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boundary conditions for 2D flow around a circle |
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April 21, 2010, 03:26 |
boundary conditions for 2D flow around a circle
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abcdef123
Join Date: Dec 2009
Posts: 17
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Can anyone tell me (or point me to a reference) about the boundary conditions for 2D flow around a circle. I think I use a velocity inlet on the left, outlet on the right, and free stream on the top and bottom? My problem I think is how to specify the free stream boundary conditions for velocity and pressure (using the SIMPLER method).
For the circle I use wall boundary conditions, zero gradient pressure and wall functions for velocity. For the inlet I am setting the velocity and allowing the pressure to be solved. For the outlet I am setting the pressure to zero and apply a zero gradient to the velocity. Is this correct? My reason for this is in trying to solve stability issues, where my code becomes unstable after a Re number of about 500. Any help is appreciated, thank you in advance. |
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