CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   Main CFD Forum (http://www.cfd-online.com/Forums/main/)
-   -   problem about direct solver for sparse matrix (http://www.cfd-online.com/Forums/main/11994-problem-about-direct-solver-sparse-matrix.html)

ztdep August 11, 2006 12:16

problem about direct solver for sparse matrix
 
Hi: I just compiled sucessfully a free avalable sparse direct solver under linux OS, I validate my procedure by a simple 2-D heat conduction problem in a square domain with all its four BC=2, so the exact solution is the terperature filed=2 in the square domain! But i have the following problem, when i use the same number of grid points in the x and y direction , i have the exact solution ,but when i set different number of gridpoints in the x and y direction 100by 50, or 5by10, the solution has a large discrepancy between the exact value! the package use a multi frontal method with pivot method! Regards


All times are GMT -4. The time now is 11:43.