Forces on Moving Boundaries #139
Replies: 2 comments
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Hi, I'am currently working on a school project where I compare different propeller. I managed to simulate the turbulences around the propeller by taking the pre made electric ducted fan setup and removing the strator. However I have no idea how to simulate the thrust of the diffrent propellers can you help me with this problem. Thanks in advanced |
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I don't think this is possible with boundary forces directly. Better infer thrust force from generated flux (from velocity field) through an area behind the propeller. |
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Hi,
first up thanks for the impressive software! I want to figure out, wether I can use FluidX3D to estimate the thrust of a propeller. I know, the current LBM implementation has issues with highly turbulent flow and needs very fine discretisation to avoid stairstepping, but I wanted to try what happens if I just crank up the mesh to sub mm size in water. However, as soon as I use moving boundaries for my propeller objects, the forces are always reported to 0. Force calculation for static objects works reasonable, but as soon as I add velocity during voxelisation it just reports 0. Is this intended behaviour or am I doing something wrong?
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