Do you have interfering parts in your simulation?
What happens if you use an odd the shelf porous?
What are your porous settings?
It is a simple model though, you can easily model it in 5 minutes.
For this model yes, and I have tried the another one that doesn't. Based on experience I don't think Solid Inteference effect the result
much when we don't tick "Heat Conduction in Solid". In some case even in training booklet it recommended use to do abit of overlap. Correct me if I am wrong
For porous media, I have tried customize one, training book one and predefined one. They all leads to inconservative mass flow.
Need to augment the argument...
Actually mass inconversation happens near porous media. The tunnel inlet and outlet are fine.
Unfortunatel the mass flow around the porous media is what I need for whole system studies.
shawn, for simple cases, interferences sometimes don't cause issues. when you have more complicated cases, they can. often meshing and solving problems.
what was the result of using off the shelf porous?
does it happen on every model?
does mesh have any influence on the problem?
i agree the model is simple to build but going through the above will help you narrow down the problem and report back here to get more help or report to your reseller if you think there is a bug
should note that i did a porous problem awhile ago where i did this same test and from what i remember the massflow rates were correct.