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Strange issue with laminar flow level set method
Posted May 23, 2014, 10:48 a.m. EDT Fluid & Heat, Computational Fluid Dynamics (CFD), Studies & Solvers Version 4.3 1 Reply
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Hi, I recently started using the laminar flow level set method to simulate the motion of water in a partially filled channel as air flows above it. The simulation runs well when the distance scales are large (50 m model width for example) running for a full 15 seconds time range or longer, but when I drop this to smaller scales (such as 5m) the simulation just blows up a few seconds in (or less) with water appearing from the outlet boundary for no reason. Anyone know what could be causing such an error?
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1 Reply Last Post May 30, 2014, 7:05 p.m. EDT
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Posted:
10 years ago
I wanted to point out that I was able to get past this issue by increasing the length of the runup slope. Problems of the nature I described seem to occur when the zero contour of the level set (the middle one) passes through the outlet. By increasing the length of the slope (and thus its height) I was able to complete the simulation without this problem occurring.