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2D unstructured mesher in F90

Posted August 9, 2012 at 08:23 by truffaldino
This is 2D unstructured mesher.

tri_mesh.f90 is a mesher and the rest are input files

Example 1: Cavity flow driven by upper cavity wall

file: cavity_bc.txt

Example 2: flow past NACA 0012 airfoil

files: NACA0012_bc.txt - airfoil
wt_bc.txt - wind tunnel
wake_bc.txt -wake

Description of the program is placed in the header of tri_mesh.f90
Attached Files
File Type: f tri_mesh.f (100.5 KB, 88 views)
File Type: txt cavity_bc.txt (65 Bytes, 48 views)
File Type: txt NACA0012_bc.txt (16.6 KB, 68 views)
File Type: txt wt_bc.txt (184 Bytes, 54 views)
File Type: txt wake_bc.txt (5.5 KB, 69 views)
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Old

Flux computation in unstructured grids

Posted July 16, 2010 at 10:49 by praveen (CFD, Numerical Analysis, Scientific Computing)
Consider finite volume scheme on unstructured grids for the Euler equations.

Let n=(n_x,n_y,n_z) be normal to a cell face and whose magnitude is equal to face area. Let Q be the conserved vector. The finite volume update equation using forward Euler time discretization is

Q^{n+1}_j = Q^n_j - \Delta t \sum_{k \in N(j)} F(Q_j^n, Q_k^n, n_{jk})

Here n_{jk} is a normal vector pointing from current cell "j" into the neighbouring cell...
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