Hi all, I am struggelling with one simulation I want to do. In this four rod geometry, only the upper layer seems to move at high velocity, while you would think that also in the center of the volume there is more movement. [afbeelding] I think the MRIZone should also be placed higher (touching …

Hi @achristiaens , I copied the project and mad a few alterations to numerics, convergence seems to be much tighter now. One simulation is running longer to try get force and area average convergence (see plots in post processor). [image] Stirred bioreactor - marine impeller by achristiaens…

Hi @achristiaens and thanks for reaching out to us! You have plenty of models inside your projects. Would you tell us the names you are referring to - makes it a lot easier! Edit: What we need to fix first is your mesh because you have way to many illegal cells and the mesh does not look very good…

Hi Jousef, thanks in advance to look at my model! The first printscreen I added was from simulation “Turbulent (WITH CellZone) fourrod agarose” based on “Hex-dominant parametric fourrof + agarose (WITH cellzone)”. The second prinscreen I added was from simulation “Turbulent (WITH CellZone) agaros…

Hi An-Sofie ( @achristiaens )! The second one you posted looks good but we could further improve the mesh and see if this will have an impact on the results as it is too coarse for now I assume. For the other case I would like to know from you which part of the geometry you want to be the MRF zone? T…

Hello @jousefm ! Indeed, I picked a coarser mesh for now just to see if it works and I will refine the mesh soon. For the first picture, the fluid that is mixed is in the bottom part so this is where the MRF zone should be. [afbeelding]

Hi @achristiaens ! Neat project you have here. I agree with what Jousef has spotted and namely your ,mesh does have a lot of illegal cells that would effectively not be usable in the following geometries: Hex-dominant parametric 2 Hex-dominant parametric marine_3D-printed + agarose (WITH cellzone) …

Hi @jousefm and @Get_Barried , I could fix the illegal cells in “Hex-dominant parametric marine_3D-printed + agarose (WITH cellzone)” following this Illegal cells inspection and Treatment . However, this does not work for the two four rod meshes. I think the problem there is in my CAD-design: [afb…

Hi @achristiaens , looks like there is some double skin geometry going on that is causing the illegal cells: [28] here I have hidden the outer walls to show the second outer wall. this causes this odd behaviour in the mesh: [05] Hope this helps, Darren

Hi Darren, I have solved the problem with the mesh now. It was a mistake in my CAD-design. [afbeelding] Now my result looks like this: [afbeelding] However I would expect some higher speeds in the middle. Also the convergence plot does not look too good: [afbeelding] So I think there is a mi…

Wow, great! I will take a look at what you exactly did tonight. Thank you for the tips, I will keep you updated on the progress!

Hello, I (we) am (are) getting there. Now I have some more questions about the postprocessing. First of all, I want to calculate the volume average speed U. I know this must be possible (based on this explanation: [Result Control] Calculation methods on specific entities and their differences ) but …

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