Originally Posted by jaydee116

Sure, wasn't knocking your system or anything. Got to do what you got to do. :cool:
My next system may have the fill tube on the rad itself. I was thinking about installing it like you have it there and drilling a hole ontop of one of the tanks and another hole through the case and solder on a copper or brass pipe with a threaded end for cap. The pipe will stick up just far enough above the top of the case to fit the cap on.

Originally Posted by greenman100

you're getting a little rediculous.

here's a pic for you, no cap, pump not running.

Originally Posted by threeputt

I hope the guy from Asetek is not one of their engineers for Asetek's sake.

Greenman, I guess you can still edit it? On the gold myth section, there's a dash instead of period right there--> "Diamond (6-50w/cm-k, dependent on purity)"

Originally Posted by nikhsub1

It's no wonder he made the comment about needing 10x the flow, did you see those blocks? They are like flat copper on the inside, 'half moon' and 'maze'. Me thinks I should stop now.

Originally Posted by angryalpaca

Wait... Can we post that e-mail (name removed, of course) to show that even some major companies have problems with myths?

Originally Posted by HammerSandwich

I read that email with the usual dejection until I realized who'd written it. Then I said, "Oh, God!" out loud.

I'd point out his strange assumption that 2 passes through the block must add more heat to the water while 2 passes through the rad must not dump as much. Also aim him at a "heat transfer is proportional to delta-T" article.

Originally Posted by email

Thanks for your email.

Maybe I am still a bit unclear.

A radiator WILL benefit from higher flow/speed, in a closed loop system. You see, the slower the water goes, the less turbulence there is. If there is little turbulence, then the water molecules near the metal will cool down, while the water molecules near the center of the pipe/fin will not change temperature as much. As we all know, heat transfer is dependent on deltaT, and if the warmer water molecules don't ever get to the colder metal, then efficent heat reansfer will not happen.

I am rather surprised that an employee of a major waterblock company does not have a better grasp of heat transfer and thermodynamics.

You would probably benefit from the following graphic:

Note that for a given airflow, as coolant flow is increased, heat transfer is increased.

http://www.overclockers.com/articles778/thermo2.gif

from: http://www.overclockers.com/articles778


Also, if it takes a 10x increase in flow to see a change in your waterblocks, I suggest you upgrade your test equipment. Take a look here:

http://www.procooling.com/html/pro_testing.php

and you'll see the test results of various waterblocks.
Performance improves markedly across the .5--->2.0GPM range.

Thanks,
Tim

Originally Posted by email

Thanks for your email.

With regard to turbulent or laminar flow, there are huge differences in radiator designs and their response to the flow velocity of the water. As an example radiators based on cylinder shaped hairpin tubes reacts differently compared to a heater core style of radiators. Furthermore some radiators use corrugated tubing design, why the water will be mixed very well independent of flow velocity.

With regard to flow rate, if you read the document that is based upon real life tests and CFD simulations, you will see that there IS a difference, but in order to see significant changes (which of course is subjective) you would need a much larger flow. For instance moving from a L20 to a L30 or moving from 3/8" to 1/2" does not have a major impact.

I'm rather surprised about your arrogant attitude. I'm sure that our success in this field must be pure luck, as we obviously don't have a clue and thermodynamics... Thanks for learning us!

Thanks,
André

Originally Posted by greenman100

ah, but the dash is supposed to be there!

check out the source link, dependent on purity, the heat transfer coefficent changes.

Originally Posted by HammerSandwich

I read that email with the usual dejection until I realized who'd written it. Then I said, "Oh, God!" out loud.

I'd point out his strange assumption that 2 passes through the block must add more heat to the water while 2 passes through the rad must not dump as much. Also aim him at a "heat transfer is proportional to delta-T" article.

Originally Posted by email

Thanks for your email.

Maybe I am still a bit unclear.

A radiator WILL benefit from higher flow/speed, in a closed loop system. You see, the slower the water goes, the less turbulence there is. If there is little turbulence, then the water molecules near the metal will cool down, while the water molecules near the center of the pipe/fin will not change temperature as much. As we all know, heat transfer is dependent on deltaT, and if the warmer water molecules don't ever get to the colder metal, then efficent heat reansfer will not happen.

I am rather surprised that an employee of a major waterblock company does not have a better grasp of heat transfer and thermodynamics.

You would probably benefit from the following graphic:

Note that for a given airflow, as coolant flow is increased, heat transfer is increased.

http://www.overclockers.com/articles778/thermo2.gif

from: http://www.overclockers.com/articles778


Also, if it takes a 10x increase in flow to see a change in your waterblocks, I suggest you upgrade your test equipment. Take a look here:

http://www.procooling.com/html/pro_testing.php

and you'll see the test results of various waterblocks.
Performance improves markedly across the .5--->2.0GPM range.

Thanks,
Tim

Originally Posted by email

Thanks for your email.

With regard to turbulent or laminar flow, there are huge differences in radiator designs and their response to the flow velocity of the water. As an example radiators based on cylinder shaped hairpin tubes reacts differently compared to a heater core style of radiators. Furthermore some radiators use corrugated tubing design, why the water will be mixed very well independent of flow velocity.

With regard to flow rate, if you read the document that is based upon real life tests and CFD simulations, you will see that there IS a difference, but in order to see significant changes (which of course is subjective) you would need a much larger flow. For instance moving from a L20 to a L30 or moving from 3/8" to 1/2" does not have a major impact.

I'm rather surprised about your arrogant attitude. I'm sure that our success in this field must be pure luck, as we obviously don't have a clue and thermodynamics... Thanks for learning us!

Thanks,
André

Originally Posted by greenman100

you're not eyeball testing, are you?

Originally Posted by greenman100

here's what I said, note the link to the thermochill article/graph



WTF.....

Originally Posted by nikhsub1

No. I looked at Asetek's data. Suggests to me those particular blocks are rather poor designs. If you note, now they use a WW clone with impingement.

Originally Posted by threeputt

Lemon lime flavor???