Learning Forum

[johsenlee]

Why does AEDT Icepak obtain a negative total Heatflowrate at the inlet, while it is positive at the outlet, and the absolute value at the inlet is greater than that at the outlet, which is completely abnormal

 

We noticed that the airflow from the inletVent is directed into the Region, and the ambient temperature is 20cel. At this point, isn't the heat flow rate entering the inlet non-zero?

However, the result obtained through Field summary is: -9.33766W

This indicates that his heat is flowing out of the inlet.

The heat flow rate of the outletVent should be exactly equal to 1W of Source1, but the result is 8.3381 W

Why are these data so confusing? I can't understand it. I sincerely want to ask for advice. If I don't solve this doubt, I don't think I can continue to use it.

I would be extremely grateful for any feedback or discussion. I have been troubled by this issue for a long time. Thank you very, very much

 

Ihave upload the project，you can download from: https://pan.baidu.com/s/1vHngc0lAU6IFeQqFAQRBXA?pwd=twe9

 

 

 

 

 

 

[johsenlee]

the result is：

at Inletvent，the ajacent normal is （0,0,1），which is go inside the region 。so the total HeatFlowRate ，-9.33766W，means that energy is going out，but  in fact  air is go into the region by 1m/s, not go out.

2、 where the -9.33766W  energy come from ,I don't know that。

3、why the outlet energy（8.3379W） is less than inlet  by absvalue？ 

this is cal by  aedt 2021R1，but in AEDT 2025R2，all is the same！

anyone  know why？thank you very much！