nanofluid!

ok so a guy got on another forum I get on a while back and asked people if they thought of trying nanofluid and a member jumped all over him so to speak.
I PMed the guy and said I would like to know more about this stuff I am willing to see how it works for my systems. I crunch so my systems are always 100% load.

I have a cheap mobo ECS G31T-M v-1.0
With a E6600 running at the time stock speed.
The waterblock on this chip is my OLD maze4 that I made a hold down for, This system was crunching right along with core temps 32c, 32c and room temp at 23.9c again 100%load

So I got all my loop drained and put the nanofluid in and decided at the last min that the stuff looked kind of heavy so I added a little maybe 8-10 OZ. of distilled water. Boot the system back up and room temp was 25c and still stock speed with core temps the same 32c, 32c

I hurt my thumb and have not had time to mess with it at all so it has been chugging right a long in my barn. about 3 weeks go by. I decide to check on it. Well room temp was down some but didn't check it. I decided to up the FSB a little. I took it up making the chip run 2.777. One week later my I go look at it. Room temps are 28.9c my cores are 36c 36c. Still running 100%

I cant say much about if this stuff is great or not yet but I can say it helps keep my temps down when I took up the FSB. I expected it to go up 1 or 2 degrees. That is what normaly happens but it didn't.

here is a pic of my system running the pump is a D5 (you can't see it) Here is also a pic of the bottle of nanofluid.

Aquafina, Purified Drinking Water?

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Originally Posted by xoqolatl

Aquafina, Purified Drinking Water?

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LOL if aquafina looked like that I would never drink it. It was an easy 1 leter bottle.

I know for sure, this is horse milk :D

LOL you will have to tell the guy that sent it to me that. 2 of them worked for months to get the mixture write for the military applications. one of them was interested in water cooling his system and decided to try this stuff in there.

LoL, you did good on the pics, but we want to see it on a quad!!!:p:

Seriously though, I would like to see some more testing done. Does this nan fluid have a smell to it? I wonder what would happen if you diluted it some more? Does the pump seem like its working harder? Oh so many questions ;)

I am thinking about putting it on my wifes B3 quad. :) hehe don't tell her!!!!!

does it smell no. does the pump work harder no! I want to do the loop again but this time I don't want to dilute it at all. I think that hurt me some. :)

What exactly is this kind of stuff? I assume it's some kind of high-performance liquid and non conductive?

Ya ya ya, test it on the wifes b3, thats will put out some heat. Get Scott over there to help your gimp butt out bro :p:

Nanofluids

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Originally Posted by Martijn

What exactly is this kind of stuff? I assume it's some kind of high-performance liquid and non conductive?

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yes it is conductive. all Water is conductive. if someone tells you that liquid is non conductive they are lying to you. hehe yeah like Naja said. :D

there is a thread in the water section also.

here is the thread that got me interested. This is another forum I get on.

Sounds interesting. I would like to know what MartinM210 thinks of this stuff. If it has a better coefficient than water that would be a first...

owl whats the freezing temp on that stuff?

and how do i get a bottle? :D

I would like to have martin test it!

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Originally Posted by NaeKuh

owl whats the freezing temp on that stuff?

and how do i get a bottle? :D

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not sure what the exact temp is but I would guess it is not any better then water.

Pure water (PURE that is) is a very good insulator. It only conducts when there are dissolved ions in it. There's also that wonderful way to blow your year's income on a pint of goo called Fluorinert. A chemically inert, totally non conductive liquid used for cooling Crays and the like.
While keeping water that pure is utterly impractical, both are non-conductive liquids.

shouldn't the stuff pure and strait actully be more efficient(provided it is a better carrier of heat)

if it is water it is conductive no matter what anyone says.
until I see someone take a bowl full of it and through it into a 480v power box that is fully powered i will argue the point :D

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Originally Posted by just a noob

shouldn't the stuff pure and strait actully be more efficient(provided it is a better carrier of heat)

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that is what I thought. i was not happy at all then when I took the FSB up some and temp didn't move i was like cool. I think what happens is that it does no good till the nano partials heat up it is no better then water.

may be so great stuff for big OC. :)

The trouble with water is that stuff DOES dissolve in it. So even though you might start with a perfectly non conductive liquid, soon enough it will become very conductive due to the dissolved materials.
Coolant needs to be more than just a carrier of heat. Real world issues like corrosion need to be considered and mitigated.

is the freezing point of it 32*F or 0*C like water, or is it lower?

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Originally Posted by D_A

The trouble with water is that stuff DOES dissolve in it. So even though you might start with a perfectly non conductive liquid, soon enough it will become very conductive due to the dissolved materials.
Coolant needs to be more than just a carrier of heat. Real world issues like corrosion need to be considered and mitigated.

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thats one reason I didn't post for so long after putting it in, I started this before my thumb

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Originally Posted by just a noob

is the freezing point of it 32*F or 0*C like water, or is it lower?

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freezes like water. that was one of my big concerns!!!

One project at a time, eh? ;)

At the scale of things around here testing needs to be comprehensive. Even if it's great for the first 30 days, if it then eats the gear ... not so good after all. You understand that, obviously. (sarcasm level 0%, in case anyone was wondering)

wonder if the stuff is like a liquid ceramic

not really it is more like antifreeze. not heavy but yeah kind of has a heavy era about it.
I diluted it some with the water because I thought it would be heavy. I now wish I wouldn't have.

Just run mercury in your loop :p: Gotta admit it would probably work real good until it amalgamated with all the metals other than steel/iron...

Nah, ya ain't workin' it hard till you need liquid sodium for your cooling loop.

edit: I'm pretty sure that stuff is DEFINITELY conductive.

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Originally Posted by D_A

edit: I'm pretty sure that stuff is DEFINITELY conductive.

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it is no more so then water. I thought the same thing was was not worried about trying it. after playing with it I see it is not any more so then water.

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Originally Posted by littleowl

yes it is conductive. all Water is conductive. if someone tells you that liquid is non conductive they are lying to you. hehe yeah like Naja said. :D

there is a thread in the water section also.

here is the thread that got me interested. This is another forum I get on.

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Actually water is NOT conductive. The impurities it picks up are what make it conductive. I use pure distilled water to clean electronic PCB's all the time.

this is a note I got from the guy that sent this stuff to me.

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There will be no issues with the nanofluid leaking. If it leaks with nanofluid that means it was leaking with water. It won't mess up any seals. It is no different from pumping water because the concentration is low enough to not affect the density...pumping liquid metal..ie..mercury..would destroy any pump. Nanofluids increase the convective heat transfer coefficient, which increases the amount of heat removed from the chip without affecting the temperatures - meaning you can put more heat into the chip because the nanofluid can get rid of it.

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Uhhhh ... liquid sodium is what they use for coolant in nuclear reactors. It is literally liquid metal. It's MUCH more conductive than water.

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Originally Posted by gillbot

Actually water is NOT conductive. The impurities it picks up are what make it conductive. I use pure distilled water to clean electronic PCB's all the time.

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and like I said open up a full 480V panel board and through a bottle all over it.
even if it is the stuff that is in it that is conductive, I am sure you will not do it because you know you will fry. :) That makes it conductive. I get tired of that stupid argument.

It's fact, not stupidity. What sounds like a petty distinction to you is profoundly important to industrial chemists.

If there is nothing in it, it is NOT conductive.

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Originally Posted by littleowl

and like I said open up a full 480V panel board and through a bottle all over it.
even if it is the stuff that is in it that is conductive, I am sure you will not do it because you know you will fry. :) That makes it conductive. I get tired of that stupid argument.

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Bit grumpy this morning are we :p:

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Originally Posted by [XC] mysticmerlin

Bit grumpy this morning are we :p:

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no just get tired of the water is not conductive but everything in it is. all though it is almost completely imposable to get the stuff out of it so it is non conductive.
Well without thousands of dollars to do it.:shakes::shakes:

so does anyone have the balls to through it into a 480v panel box. :D

does conductivity REALLY matter? I've seen quite a few fried computers because the "non-conductive" coolant they used was actually conducting. I dont think its THAT much of an issue! BACK TO THE NANOLIQUID! i want results!

Thanks you MEM!!!!!! That is what I am saying LOL

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Originally Posted by littleowl

and like I said open up a full 480V panel board and through a bottle all over it.
even if it is the stuff that is in it that is conductive, I am sure you will not do it because you know you will fry. :) That makes it conductive. I get tired of that stupid argument.

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Originally Posted by littleowl

no just get tired of the water is not conductive but everything in it is. all though it is almost completely imposable to get the stuff out of it so it is non conductive.
Well without thousands of dollars to do it.:shakes::shakes:

so does anyone have the balls to through it into a 480v panel box. :D

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Been there, done that, Nothing happened. We had a water leak at one of my industrial facilities of PURIFIED water used in the manufacture of food items. This water is as clean as clean can get. Someone had to go into a flooded MCC and kill the main before it blew. Guess who got the call and guess who is still here and alive because NOTHING HAPPENED.

PURE Water is NOT conductive. I have taken many electrical/electronic components and submerged them in pure distilled water then dried them out to clean them, They still work fine. Call it splitting hairs if you want but the fact remains, my statement is 100% true.

Everything conducts given enough voltage and current. What do you think lightning is? It's air conducting electricity. It's not doing it particularly efficiently (hence the sound and light show), but it IS conducting. If you get good quality distilled water, you can run things like 12v fans and stuff in it easily without shorting the fans out, hence it's not a conductor (at least while it's relatively pure). Yeah, with something like a 480v source things might change, but for all intents and purposes it's an insulator.

Eller

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Originally Posted by gillbot

Been there, done that, Nothing happened. We had a water leak at one of my industrial facilities of PURIFIED water used in the manufacture of food items. This water is as clean as clean can get. Someone had to go into a flooded MCC and kill the main before it blew. Guess who got the call and guess who is still here and alive because NOTHING HAPPENED.

PURE Water is NOT conductive. I have taken many electrical/electronic components and submerged them in pure distilled water then dried them out to clean them, They still work fine. Call it splitting hairs if you want but the fact remains, my statement is 100% true.

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not to sound mean but those panel boxes are sealed with a rubber seal. We have it happen at work all the time also. As long as the rubber has not dry rotted then the water never made it in.




:D we should never have a dead component when we have water leaks :shakes:

yes everything is conductive, so why is everyone so worried about it all of a sudden???

What's in this nanofluid ? what makes it so special?
I guess 'nanoparticles' :confused:
What kind of 'nanoparticles' . Any more info on that?
There must be a technical explanation why it works better than H20

There is not really any testing that has been done yet.
he will sent me a message later on and I will post it up as he answers his questions. because he is not a member here. :(

Yes it has nanoparticles in it. They are so small and light that they flow with the water. As the water heats up they heat up and hold more heat. As they pass through the rad they get cooled back down just like your H2O does. They are so small that the heat blows right out of them. leaving them cool again to pick up more heat.
So in turn you move more heat faster then H2O. But I want Mcoffey or Martin to do some heavy heavy testing on it to see what it can withstand. :) Like I said I have not done much with it but what I am seeing really amazed me. I know it is not much.

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Originally Posted by littleowl

not to sound mean but those panel boxes are sealed with a rubber seal. We have it happen at work all the time also. As long as the rubber has not dry rotted then the water never made it in.




:D we should never have a dead component when we have water leaks :shakes:

yes everything is conductive, so why is everyone so worried about it all of a sudden???

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Trust me, they are not sealed at all. This plant was built in the 60's. :rofl: :ROTF:

Plus, this is the old style siemens gear and they didn't use any gaskets at all. I can assure you the water was in the gear, I worked in there for weeks testing and cleaning after that mess. It was nearly knee deep when I got in there to kill power but not one MCC tripped offline. :up:

well sorry for being optimistic but our plant was built way back then also and the boxes have been sealed since the early 30's. I don't be leave what I don't see I guess :D

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Originally Posted by gillbot

Trust me, they are not sealed at all. This plant was built in the 60's. :rofl: :ROTF:

Plus, this is the old style siemens gear and they didn't use any gaskets at all. I can assure you the water was in the gear, I worked in there for weeks testing and cleaning after that mess. It was nearly knee deep when I got in there to kill power but not one MCC tripped offline. :up:

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Well to be quite honest with you, if the gear didnt get wet, then it wouldnt trip. Im an electrician & have worked in many food processing plants. I dont want to argue here, but if the room flooded with purified water, it will pick up contaminants from the floor & thus be conductive. Ever seen a 480v switch go up in flames? I have twice in my life & its not pretty.

ps. i dont want to argue & nor does owl. done deal with me........

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Originally Posted by D_A

Uhhhh ... liquid sodium is what they use for coolant in nuclear reactors. It is literally liquid metal. It's MUCH more conductive than water.

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Most liquid metal coolants have the huge problem of needing to stay hot, if the reactor gets SCRAM'd and the rest of the loop cools off it solidifies and needs to be heated, sodium, or lead, or many metallic liquid coolants won't work as the computer won't survive the temperatures, mercury is safe if there is proper ventilation, there is a fountain in france or some european country that runs with mercury...

I know liquid sodium is what we would consider 'hot'. Sorry, I forgot the metallurgist humour alert tags.

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Originally Posted by [XC] Hicks121

Well to be quite honest with you, if the gear didnt get wet, then it wouldnt trip. Im an electrician & have worked in many food processing plants. I dont want to argue here, but if the room flooded with purified water, it will pick up contaminants from the floor & thus be conductive. Ever seen a 480v switch go up in flames? I have twice in my life & its not pretty.

ps. i dont want to argue & nor does owl. done deal with me........

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I'm not arguing, I don't really care if anyone believes me or not. I know the water will pick up contaminants which is why I had to get in there and kill it. Yes, some of the gear was completely submerged.

I have seen many pieces of gear go up in flames with voltages as high as 1,000Kv. The voltage isn't the problem, it's the available short circuit fault current.

I'm an industrial electrician with experience in food processing plants, petro-chemical, power generation, mining/ore processing, instrument installation/service/calibration and defence manufacturing.
The difference in conductivity is used to measure the dissolved mineral content in a water stream. More dissolved minerals means more conductive in a predictable manner. Similarly less dissolved mineral means less conductive down to where pure H2O has zero conductivity. The required voltage (current is NOT a factor as that's the FLOW of electricity. Once current is flowing it's already ionized.) to break water into ions (H+ and O-) and conduct is 80volts per millimetre distance. Air is much higher.
edit: put another way, pure water has a resistivity of 18.2 MegaOhms per centimetre.

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Originally Posted by D_A

I'm an industrial electrician with experience in food processing plants, petro-chemical, power generation, mining/ore processing, instrument installation/service/calibration and defence manufacturing.
The difference in conductivity is used to measure the dissolved mineral content in a water stream. More dissolved minerals means more conductive in a predictable manner. Similarly less dissolved mineral means less conductive down to where pure H2O has zero conductivity. The required voltage (current is NOT a factor as that's the FLOW of electricity. Once current is flowing it's already ionized.) to break water into ions (H+ and O-) and conduct is 80volts per millimetre distance. Air is much higher.
edit: put another way, pure water has a resistivity of 18.2 MegaOhms per centimetre.

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I was referring to the bucket blowing up and causing damage. The damage is caused by the available fault current, not the voltage itself.

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Originally Posted by D_A

pure water has a resistivity of 18.2 MegaOhms per centimetre.

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I remember using a 12V fuel pump as a water pump, that thing was always fully submerged, and it had multiple exposed contacts, none of the water electrolysis -ed and most people have done the thing where you take a car battery and run wires from it into saltwater, and it makes the bubbles...
[just a personal experience added to what everyone else said]

Now, back to nanofluid! :science:

Yes ... the nanofluid. How is that working out?

link to where can buy?

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Originally Posted by tiro_uspsss

link to where can buy?

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I do not know of anyplace to buy it as of yet. The guy I got it from has created a name and is trying to get on here to reply to people and explain more. :)

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Originally Posted by littleowl

I do not know of anyplace to buy it as of yet. The guy I got it from has created a name and is trying to get on here to reply to people and explain more. :)

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sweeeet :up:

He may have a ready market here.

I want to see mcoffey or someone do some hard testing of it before he would start selling it.
I am also waiting to see what 123bob has to say about it. :) he also has a nice bottle of aquafena (sp?) :rofl:

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Originally Posted by littleowl

I want to see mcoffey or someone do some hard testing of it before he would start selling it.
I am also waiting to see what 123bob has to say about it. :) he also has a nice bottle of aquafena (sp?) :rofl:

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this is really nice, we can start buying it

you never know xtclocker. It may not be worth buying! We need to get some heavy testing done to see. :D

I'd definitely consider buying some provided that it:
1) Gives a definite improvement in temps over distilled water (obviously mileage will vary depending on where the heat limitations are in each particular loop)
2) Has enough anti-microbial properties that you don't need to add anything else to the loop
3) Will last a decent amount of time (9-12+ months) without needing to be flushed and changed
4) Can be flushed down the drain or disposed of in some similarly easy manner.

Eller

I can now answer some of the nanofluids questions..

We have had some on the shelf for almost 6 months. My partner has had a bottle of it at his house in his shed for almost as long. We have notice no microbial growth at all. The DI water will also help with the growth. We will look into the amount of the chemical needed to inhibit any microbial growth and see if that is less than what we have mixed.
With all the samples we have sent out we are hoping to get a good idea of what the capabilities are versus regular water. Of course this will depend on system as a whole..ie..if your radiator is too small, then it will peak out.
I really don't see any reason that it would have to be changed at all. The nanofluids can't break down or decompose. As long as the system is closed and leak free it should be good for quite some time.
As for being poured down the drain. The MSDS sheet received with the concentrated nanofluids say not to pour it down the drain. We will have to look into what concentration is safe for disposal.

Hopefully, littleowl will get some results soon, as will some of the other places. I currently have it in my system now without any problems, but I do not push the computer...that is why we wanted to send it off to people/labs more capable of that.
I am going to work on a graph to post based on some pump flow rates. It should show what kind of enhancement littleowl might expect due to his diluting the mixture. I will try to get that in the next few days

relttem,

I have the bottle you sent. It will go in my main rig this weekend. We did not have any guidance as to how to use it. So that I'm clear and you get good data;

1. Do I use it 100% concentration, just as you sent it?

2. I suppose we do not want to put in any additives like antimicrobial stuff? Just the pure fluid, for out test, right?

3. Toxicity. I'm not planning on drinking the stuff, but what if the cat likes it? I need to know a little more here. I'm not afraid of it, with all the other chemical stuff I use, but I want to know how bad it might be. (I.e. If I decided to do shots of the stuff, what do I tell the folks at the hospital???:rofl:) You've said not to pour it down the drain. What would be the proper disposal method?

I'll collect "before" load and idle and ambients, then "after" load and idle and ambients. Anything else you want to see?

Thanks and Regards,
Bob

yes, we sent you our optimum concentration, so do NOT dilute it. I'd drain your water out and pour that straight in and follow the rest of the cooler's instructions - no air bubbles etc. I am pretty sure your cat won't like it. You can handle it, get it on your hands etc, but don't bathe in it or drink it - as you said. Pretend you are handling anitfreeze or dishsoap. When you are done wash your hands.
what we want to see is a comparison. So, if you could run your current set-up thru some tests and mark down what your temps/MHz are etc and then run thru the same tests with the nanofluid. Over-clock if you can. I bumped my FSB up, ran some bench marks and temp readings..then did the same with the nanofluid. Anything like that would be great.

We appreciate it.

thanks

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Originally Posted by littleowl

I want to see mcoffey or someone do some hard testing of it before he would start selling it.
I am also waiting to see what 123bob has to say about it. :) he also has a nice bottle of aquafena (sp?) :rofl:

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I can perform the tests if mcoffey is busy or booked on block tests. I have a similar setup to mcoffey and Martin, I just don't have the experience under my belt they do.

OK relttem. Will do.

Don't forget to tell anyone else testing this on other forums to carefully measure ambients as well as the run temps. Our test data won't mean much without it.

I'll plan on testing a matrix of test points.

@Stock clock - before and after - load and idle

@My max crunching overclock - Before and after - load and idle.

I should have results late Sunday, with the weekend schedule I have. I'll post them here.

Regards,
Bob

See that is my problem I cant control the ambient temp at all. :(

this is exciting! :)

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Originally Posted by littleowl

See that is my problem I cant control the ambient temp at all. :(

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I don't think you need to control it, just be accurate in recording and measuring it when you test. If you test at the same point, we can adjust the data to account for variation in ambient.

Bob

Just thought of something, I might add.
When using a nanofluid, wouldn't it be like super conductive?
So I'm scared because if you get a leak, and the computer's on, it would like.....fry everything.:shrug:

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Originally Posted by littleowl

See that is my problem I cant control the ambient temp at all. :(

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You don't need to control it, you just need accurate measurements of the ambient temperature. If we were to compile all the results, they'd most likely be reduced to deltaT (the difference between CCPU temp and ambient or liquid temperature).

Eller

nanofluid;
Is that what us old guys get when we get too excited?:rofl:

I wish I had a loop to test this stuff out in because it sounds very promising to me.

I have a loop (and holidays soon, so I'd have time), but I don't have the knowledge or the testing equipment (by testing equipment, I mean good thermometers both in-line and for ambient) (or the patience, for that matter :p:) to do a proper test with it.

Eller

it is no more conductive than DI/distilled water..on that note, if you dilute it you need to use either distilled or DI water. You don't need to worry about it spilling anymore than water. If it leaks..shut down, and wipe it up.
Ambient is important to keep track of, but if you are in an air-conditioned/heated room it should be pretty constant..as long as your system isn't by a vent. You want to make sure the same apps are running etc. I restarted after each benchmark to clear everything. My MSI boards has an applet that will automatically step up the FSB and test for stability. The problem I ran into was I maxed out the FSB and ran into hardware issues before I had any problems with heat. Based on what we did for our research project this should work like a charm. We will see soon enough..I hope

What we think will happen is that plain water will reach its max heat removal earlier than the nanofluid, thus not allowing you to push the chip as much.

thanks

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Originally Posted by karl_eller

You don't need to control it, you just need accurate measurements of the ambient temperature. If we were to compile all the results, they'd most likely be reduced to deltaT (the difference between CCPU temp and ambient or liquid temperature).

Eller

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Correct, if tests and measurements are valid, you will see a linear rise or fall of the liquid temp, core temps, etcetera as the ambient temperature flucuates. Well, as long as core load, voltage, fan speed and flow rate remain constant.

sub'd... Can't wait to see some results :up:

relttem - Does the introduction of particulate make the water abrasive at all, or more technically do you know the shape of the particulate added?

My concern is really that the added particulate may have sharp edges which while even being microscopic can eat away at the pump housing, impeller, or any water blocks.

Holy double post Batman! :eek:

Good question though.

The concentration of the nanoparticles is not enough to have that kind of adverse effect. So, you won't have anything of that sort happen. You have to remember that these are 10^-9 in size. We had to use SEM/TEM to actually see them. I am not sure your basic micro-scope would even be able to see them..micro is 10^-6.

That answer the question?

I'm sure the particles are no larger in size than the disolved minerals in tap water (probably a lot smaller). Obviously tap water is a no-no for WC, but that has more to do with mineral buildup, reduced thermal conductivity, etc. As long as these particles don't "build up", I wouldn't think that component wear would be an issue...

They are so small that they are *almost* neutrally buoyant. They will settle over time if left unmixed, but a simple shaking will mix them back up. So, if your pump is always going they won't settle, and even if you turn the pump off for a period of time turning it back on will mix them back. We were looking at them under the SEM and TEM to see if there was any agglomeration.

I am just curious to see what the test-people find out

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Originally Posted by relttem

The concentration of the nanoparticles is not enough to have that kind of adverse effect. So, you won't have anything of that sort happen. You have to remember that these are 10^-9 in size. We had to use SEM/TEM to actually see them. I am not sure your basic micro-scope would even be able to see them..micro is 10^-6.

That answer the question?

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Would the size have a polishing effect in that case then? Darn particulate :/

no..to have a polishing agent it has to be more dense. If we made it concentrated enough it would make your pump work harder and slowly erode things, but our density is basically the same as water. So, you won't see anything like that happen.

Abrasion is not about density though.

Just have to wait for some test results I suppose.

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Originally Posted by STEvil

Abrasion is not about density though.

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there are not enough nanoparticles in the fluid for it to be abrasive. Thus, the density of the water is unchanged...how about that? If we put a lot of nanoparticles in the fluid, the density would change and the fluid would be more abrasive..sort of like puting one grain of sand in a cup of water versus 100,000 grains.

The one grain of sand would still be abrasive, but the nano-particles might be light enough to get out of the way of the impeller blades from the thin film of water that is traveling with the impeller [I'm figuring surface tension has something to do with it... just thinking of how it seems it might work... you know?]

one grain of sand in a cup of water would be abrasive...true..but, it would be many magnitudes of order less abrasive than 100,000 grains of sand in a cup of water...so, if water's abrasive measurement is 100..our nanofluid mixture abrasive measurement is barely higher ~100.00001. We ran our nanofluids over a painted, heated flat copper plate at Reynolds numbers up to 500,000. The Reynolds number gives the ratio of inertia (velocity and density) and viscous (viscosity) forces. We ran different concentrations at different speeds and noticed no abrasive effects on the painted plate. Now, the laser we were using for PIV and PLIF burned the paint. If water is chewing up your impeller then the nanofluids will too. Being almost neutrally buoyant the nanoparticles are going to follow the stream lines going thru the pump - basically just following the flow. If it were abrasive it wouldn't follow the streamline; they at actually drag along the surface - thus the abrasion. A phenomena called 'the boundary layer' is developing around the impeller blades as they spin. The stream lines follow the boundary layer thickness with the nanoparticles following the streamlines. Make sense? - it is hard to explain without drawing it.

wow cool stuff really looking forward to some results!!
sub'd

BTW reynolds number of 500000!! How long and what temps was the plate at? because that some pretty fast moving water haha.

yeah, that water was flying thru the test section. When it was wide open it was actually scary. It was a 5hp pump - If I remember correctly it could pump 50gpm. The test section was 2x2 inches, with a 9-3/8inch plate. I think we were measuring halfway down. It pumped so fast that we had cavitation, and it put so much heat into the fluid that we had to put the fluid thru a cooling section to prevent it from boiling (and to keep the temperature of the fluid constant). There were a few times we forgot to turn that on, so I know how hot that water can get. We pressurized the loop to kill the cavitation.

Hello relttem, this is safe to use with acrylic based materials?

acrylic based materials?..like what? We would have to test the ph, but I am pretty sure that it is neutral. It is a lot of water, and if I remember correctly water doesn't bother acrylic paint after it dries. I would have to have more information on what you are doing with it.

I think he's referring to the acrylic used for the clear tops in a lot of water cooling components, like the CPU blocks etc.

our test loop in the lab was made out of clear PVC and a GE untra clear Polymer..we didn't have any problems with those..and, we sent the samples out in Aquafina 1litre bottles.

We got the stuff out to another person on here and to a guy at Tom's Hardware on Friday..results should be soon..

You couldn't have picked someone better than Tom's Hardware? :p: They haven't exactly been the most accurate reviewers in the past while :p:

Eller

Three people on here, a guy at Tom's, and a guy at Anandtech have samples. We got kicked off the MaximimumPC forum and they deleted our thread..it was sort of funny, but I recommend you NOT mention nanofluid on their forum. I am hoping soon for the review. I know the Tom's guy said it might be a week or two. Anandtech has had it for a few months..I have no idea what is going on there. And, the three guys here pretty have only recently got it with Littleowl reporting back...

Why was the thread on MaximumPC deleted? Any particular reason?

Eller

they thought we were full of :banana::banana::banana::banana::banana:...those were their exact words as a matter of fact

I would have thought that sort of judgement should have waited till after a proper assessment of the product.