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No solution after switching from creeping to laminar flow regime
Posted 29 apr 2019, 14:14 GMT-4 Computational Fluid Dynamics (CFD), Microfluidics, Studies & Solvers Version 5.3 5 Replies
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I have a problem, where I cannot find a solution to. My problem I want to solve, is a narrow channel (µm range), where in same parts species are generated (transport of diluted species). The flow is then stopped, the species accumulate in the channel and are then flushed away by restarting the flow. So, as my Re number is roughly 1.2 I decided to start with a creeping flow regime to make thinks easier. After a while it works with my geometry well. But now, when I switch to laminar flow (as the Re has to be << 1 for the creeping flow, I want to use laminar flow to have a more realistic model) the solver does not find any solution. I tried all kind of different solver conditions and tried to find the answer here in the forum, but the solver does not convergate and find no solution. I uploaded the file. Hope some of you can help me out here, as I really do not know what the problem is.
Thanks a lot