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April 20, 2008, 09:15 |
(non)-reflecting boundary conditions???
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#1 |
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Hi
I am using a NS-code which is implicit to solve a turbomachinery application. I have problems with the initialisation of my testcase which is a linear fade f (rho, rho*c1,rho*c2,...) between GRID-INFLOW and -OUTFLOW conditions. The problems occur in the ghost-cells of the grid inflow. Even though the MACH-level of the initialisation is quite good ( I know this because I know the solution) the Mach-number rises in the ghost-cells (grid inflow) to Ma > 2. Has anybody an idea how I can fix that? Or why that may happen? I thoguht the "right" velocity-distribution should help to get the exact solution much faster... Moreover I have heart something about (non-)reflecting boundary-conditions but I have no imagination what it is and when I have to use them? Could you help me to understand it? Do you know any good paper which explains the problem? Thx |
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April 20, 2008, 12:03 |
Re: (non)-reflecting boundary conditions???
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#2 |
Guest
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Few References:
Poinsot and Lele (1992) - Journal of Computational Physics Giovli (1991) - Journal of Computational Physics Rudy and Strikwerda(1980) - Journal of Computational Physics |
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