Learning Forum

[860854801]

In my model, the heat source distribution is highly non‑uniform. The clp function in Icepak does not work well (the manual also mentions this limitation). To deal with the non‑uniform heat source, I have divided the original heat source region into many smaller parts, about 60 blocks. The simulation results look reasonable and match my expectations physically.

However, I’m facing a performance problem:

When assigning losses to each block, during the preprocessing step after meshing and before solving, I noticed that some time is spent generating the wall-shadow, about 15 min. Please see the attached picture. If I do not apply these losses to the rectangular blocks, this preprocessing step becomes much faster.

Could you explain why adding losses to these blocks makes the wall-shadow generation so time-consuming? And is there any way to speed up this process when losses are applied?