Hello all,

i need to simulate some inlet geometries designed as different diffusors. The water flow stream will then impinge on a stack of plates, which will be 300um thick and also with a 300um spacing between them. In order to check these inlet geometries and flow distribution on the flow channels i will first need to do only stationary flow simulation without any heat transferring, just flow. In addition, i will be in very laminar flow range about reynolds numbers of ~50 to 200.

So in case of meshing: Right now i have manually set planes to get exactly two fluid cells in between of two solid material plates. As SW FS is solving with cartesian cuboid cells, i thought initially it is better to have better have "pure" cells as partial cells if possible. Please see img_001 for the meshing and img_008 for the results. As for the diffusor this question does not appear, but for the channels and at the inlet into the channels i only have complete fluid cells. As for example in:

https://forum.solidworks.com/message/324294?q=Meshing%20on%20boundary%20layers%20between%20fluid/solid%20and%20treatment%20of%20partial%20cells

Bill McEachern says it is not even possible to "resolve a wall with out partial cells". I know that SW FS is treating partial cells with different control volumes from referred by CAD model, but how is this exactly handled? Is he right in his statement that for example also in heat transfer mechanisms there NEEDs to be partial cells? Maybe right now for this simulation it does not even matter, but what if i want use "my" method of meshing for heat transfer - does this affect the results and in what range?

Thanks in advance for your answers!