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Hard time on Transonic Linearized potential equation |
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July 9, 2009, 00:33 |
Hard time on Transonic Linearized potential equation
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Flávio Sousa
Join Date: Jul 2009
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Hi
I've been working on a code for the discretization of the Transonic linearized equation on a flow past a biconvex airfoil. Code:
( M˛_inf ) (1-M˛_inf - (g +1) --------------phi_x ) phi_xx + phi_yy = 0 ( U_inf ) I'm using a 2nd order discretization for 2nd derivatives, central in Y, and backward in X, and linearizing the term between brackets, recalculating it, at each iteration, using the new phi field. The 1st derivative in x is upwind. I'm having a hard time making the solution converge and it's about the 4th time I rebuild the code and debug the results step by step. So my guess is, the boundary conditions aren't well posed. There's little information freely available on the internet, and although I've found the topic on several books, they don't go into great detail. Has anyone solved this problem. Is there a trick that I'm missing? Thanks S. Last edited by Joseph S.; July 11, 2009 at 17:21. |
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