Is a CFD Model Accurate in Predicting Temperature of a Computer Chip in a Duct?

AI Thread Summary
The CFD model indicates that the maximum temperature for the laminar case is 440 K, while the turbulent case is 395 K, which raises questions about the expected temperature behavior. The average temperature for both cases is approximately 310 K. Enhanced mixing in the turbulent boundary layer contributes to a higher heat transfer coefficient, which may explain the lower maximum temperature in the turbulent case. This outcome contrasts with the assumption that turbulent flow would yield higher temperatures. The findings suggest that the model's predictions align with fluid dynamics principles, emphasizing the role of flow characteristics in heat transfer.
engineer23
Messages
68
Reaction score
0
I am running a CFD model with a computer chip measuring .06 x .05 x .005 m immersed in a rectangular duct measuring .3 x .1 x .02 m. The flow has velocity of about 2.5 m/s. The maximum temp. for the laminar case is about 440 K, while the max temp. for the turbulent case is 395 K. Does this sound right? I would have guessed the turbulent case would have a higher temp.
Both cases have about the same average temperature (~310 K).
 
Engineering news on Phys.org
turbulent boundary layer has enhanced mixing, & hence enhanced heat transfer coefficient.

Take a look at the plot
 

Attachments

  • New Bitmap Image.JPG
    New Bitmap Image.JPG
    14 KB · Views: 445
Hi all, I have a question. So from the derivation of the Isentropic process relationship PV^gamma = constant, there is a step dW = PdV, which can only be said for quasi-equilibrium (or reversible) processes. As such I believe PV^gamma = constant (and the family of equations) should not be applicable to just adiabatic processes? Ie, it should be applicable only for adiabatic + reversible = isentropic processes? However, I've seen couple of online notes/books, and...
Thread 'How can I find the cleanout for my building drain?'
I am a long distance truck driver, but I recently completed a plumbing program with Stratford Career Institute. In the chapter of my textbook Repairing DWV Systems, the author says that if there is a clog in the building drain, one can clear out the clog by using a snake augur or maybe some other type of tool into the cleanout for the building drain. The author said that the cleanout for the building drain is usually near the stack. I live in a duplex townhouse. Just out of curiosity, I...
I have an engine that uses a dry sump oiling system. The oil collection pan has three AN fittings to use for scavenging. Two of the fittings are approximately on the same level, the third is about 1/2 to 3/4 inch higher than the other two. The system ran for years with no problem using a three stage pump (one pressure and two scavenge stages). The two scavenge stages were connected at times to any two of the three AN fittings on the tank. Recently I tried an upgrade to a four stage pump...
Back
Top