Flow deltaT adjustment on thin volumes #3045
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@shaomeng something still isn't right here. If you set the Z component to 'none', the resulting stream lines are close to zero length. Increasing the integration count has no visible effect (other than the computation takes a lot longer). Perhaps if a velocity component is 'none' you should not be including the associated coordinate extent in the calculation of deltaT. E.g. If the Z component of velocity is set to 'none' then the Z extent of the domain should not be used in the calculation of deltaT.
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Getting closer, but I still can't get the integration to proceed beyond a very short distance when "Z field" is none, can you? Can you explain why this is happening? |
@clyne The variables v1 and v2 have mostly tiny values centered around zero, resulting in many "sinks" or near sinks, which are areas with zero or near-zero values. When a particle enters a such area, it makes small movements in the sink but can be almost impossible to escape. With a domain size of millions, those small movements appear invisible. For this particular data set, it appears that there are more sinks than non-sinks, so most particles fall in sinks after traveling a while. |
fix #3008