[boffin5]

Hello,

In my efforts to debug my chtmultiregion case, I finally got it to create data! Then when I went to paraView, the pressure Distibution (see attached image) has an obvious problem, with high pressure at the inlet, and low pressure at the outlet, ignoring the body in the domain.
I have been thrashing this for a couple of days, so far without luck.
It could well be that someone amongst the community has seen this problem and found a fix for it; if so, could please! share your experience with me.

[qingqingliu]

Originally Posted by boffin5

Hello,

In my efforts to debug my chtmultiregion case, I finally got it to create data! Then when I went to paraView, the pressure Distibution (see attached image) has an obvious problem, with high pressure at the inlet, and low pressure at the outlet, ignoring the body in the domain.
I have been thrashing this for a couple of days, so far without luck.
It could well be that someone amongst the community has seen this problem and found a fix for it; if so, could please! share your experience with me.

From my understanding, it is right if the inlet pressure is higher than the outlet

[boffin5]

Thanks for your response!

In a steady state simulation, although there may be slight pressure changes in the domain, I would expect it to be basically consistent, and show only the changes due to perturbations around the body, as shown in the attached.

However, in my problem case, there is a huge pressure change between the inlet and outlet, which cannot be right!

[qingqingliu]

Originally Posted by boffin5

Thanks for your response!

In a steady state simulation, although there may be slight pressure changes in the domain, I would expect it to be basically consistent, and show only the changes due to perturbations around the body, as shown in the attached.

However, in my problem case, there is a huge pressure change between the inlet and outlet, which cannot be right!

I see, it seems that the coupling boundary between the solid region and fluid region is incorrect. Did you see a velocity gradient on the solid surface?