On 11/26/2013 07:22 AM, Bogdan Costescu wrote: > One of the pics shows a bubbling liquid surface, we've seen recently > similar pics. From what I remember from past discussions on this very > list, the bubbles are bad for heat transfer - it's OK to have them at > or very near to the surface, but not down below. Has the physics > changed behind my back ?
<queue non-physicist comment, 99% chance of being wrong> I have heard (a long time ago, admittedly) from little overclocking birdies that in poorly-designed or tightly-packed arrangements, putting an aquarium bubbler or some such hacky bubbling mechanism allows you to avoid the hotspots in the oil you would otherwise suffer from around your main heating components (passively cooled bridges in home setups are known issues here). Overall bubbles don't help heat dissipation (and may hurt it as suggested), but if your problem isn't the overall temp of the tank but instead making sure the temp is fairly average throughout, bubbles may help. I've kept my mouth shut on the matter so far because I have no proper training in the area to ground this suggestion on. <dequeue> Going back to my storage hole now. ellis -- Ph.D. Candidate Department of Computer Science and Engineering The Pennsylvania State University www.ellisv3.com _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
