h395523899
Subscriber

Maybe I didn't make myself clear


As is shown in


The first and second schematic are my original ideas.


The pipe wall is provided with a certain thickness, and the pipe wall is provided with a porous medium or the inner wall is provided with a porous jump.


But the number of meshes in the model increases as the model gets larger.


Now my idea is to remove the wall thickness, the wall is just a shell. In this way, whether it can pass through the udf or uds is the filtering effect of the pipe wall.