November 28, 2019 at 9:28 pmAgriCFDSubscriber
Currently I try to simulate a mower with to fast rotating (3000rpm) knifes. There is an overlap of the rotational movement of the knifes, so have to work with an overset mesh.
If I simulate a slower rotational Speed (<300), the calculation works fine. But when I try to calculate the high speed rotation I get a Floating point exeption, because of divergence in the turbulence variables, after 1-10 timesteps, depending on the used mesh and time step size. I've tried a wide range of cell sizes and time step sizes (1e-3 to 1e-06), but nothing works. Further I tried the most of the turbulence models that are working with overset meshes, but the result is always the same.
The attached screenshot Shows a cutcell background mesh, I also tried tetra- and polyhedral meshes. I even tried very Basic geometries like Rotation boxes and even in that case the calculations Interrupt.
Are there any limitations on overset meshes that I'm not aware of?
November 28, 2019 at 9:29 pmAgriCFDSubscriber
sadly attaching of the screenshot is not possible in the moment
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