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Showing results 1 to 6 of 6 Search took 0.00 seconds. Search: Posts Made By: nuovodna

Forum: OpenFOAM October 4, 2010, 08:18

Replies: 15 Convection-diffusion in 1D : wrong solution for a large Delta x Views: 3,810 Posted By nuovodna expected results Hi Santiago, i read your bug report and my results correspond to your alert on fvm::div assembling. This problem is described here Finite Volume Method for Convection-Diffusion Problems ...

Forum: OpenFOAM October 4, 2010, 05:53

Replies: 15 Convection-diffusion in 1D : wrong solution for a large Delta x Views: 3,810 Posted By nuovodna one dimensional convection-diffusion results Hi Santiago, these are my results. Equation: fvm::div(v,U) == fvm::laplacian(d,U) with d= 0.001 v = 1 U(0) = 0

Forum: OpenFOAM July 2, 2010, 05:45

Replies: 15 Convection-diffusion in 1D : wrong solution for a large Delta x Views: 3,810 Posted By nuovodna I printed the noU values in this way ... I printed the noU values in this way fvScalarMatrix noUEqn ( fvm::div(v,noU) == fvm::laplacian(d1,noU) ); solve(noUEqn);

Forum: OpenFOAM June 18, 2010, 05:47

Replies: 15 Convection-diffusion in 1D : wrong solution for a large Delta x Views: 3,810 Posted By nuovodna I invert the matrix manually and it returns the... I invert the matrix manually and it returns the same negative value. Perhaps, the effect of boundary is dominant

Forum: OpenFOAM June 7, 2010, 09:45

Replies: 15 Convection-diffusion in 1D : wrong solution for a large Delta x Views: 3,810 Posted By nuovodna If i use UPWIND scheme on div, I have this noU... If i use UPWIND scheme on div, I have this noU cell values: -3.41333e-07 -2.38933e-06 -1.26293e-05 -6.38293e-05 -0.000319829 -0.00159983 -0.00799983

Forum: OpenFOAM June 4, 2010, 09:09

Replies: 15 Convection-diffusion in 1D : wrong solution for a large Delta x Views: 3,810 Posted By nuovodna Convection-diffusion in 1D : wrong solution for a large Delta x Hi, i wrote a solver to solve a convection-diffusion equation on a 1D mesh fvScalarMatrix noUEqn ( fvm::div(v,noU) ==...

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