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

[engineer23]

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).

 

[ank_gl]

turbulent boundary layer has enhanced mixing, & hence enhanced heat transfer coefficient.

Take a look at the plot

 

[oswaler]

I would first commend you for using a CFD model to simulate the behavior of a computer chip in a duct. This is a valuable tool for understanding the thermal characteristics of electronic devices.

Regarding the results, it is not surprising to see a higher maximum temperature in the laminar case compared to the turbulent case. In laminar flow, the fluid moves in smooth, orderly layers, which allows for efficient heat transfer from the chip to the surrounding fluid. In turbulent flow, the fluid moves in unpredictable patterns, which can create areas of low heat transfer and thus result in a lower maximum temperature.

Furthermore, the average temperature being similar in both cases suggests that the overall heat transfer is similar. However, it is important to note that the maximum temperature is a critical factor for the performance and reliability of a computer chip. Therefore, the lower maximum temperature in the turbulent case may actually be more desirable as it indicates better cooling and potentially longer lifespan of the chip.

In conclusion, the results of your CFD model seem reasonable and highlight the importance of considering both maximum and average temperatures when analyzing the thermal behavior of electronic devices. Further investigation and refinement of the model may provide more insights into the heat transfer processes involved in this system.