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March 20, 2007, 08:39 |
Hi all,
I am new to OF so m
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#1 |
New Member
gianfilippo coppola
Join Date: Mar 2009
Posts: 14
Rep Power: 17 |
Hi all,
I am new to OF so my question may be stupid, anyway, I am trying to simulate an axisymmetric opposed jet configuration, where each jet has a circular flange flat with the exit section. I am using icoFoam from FoamX and blockMesh to generate the mesh. Below is the blockMeshDict file: arguments "/$HOME/OpenFOAM/$HOME-1.3/run/tutorials/icoFoam/counterflow" off; convertToMeters 0.001; vertices ( (-14.5852 0 0) (-0.297656 0 0) (-0.297656 1.19063 -0.051984) (-14.5852 1.19063 -0.051984) (0.297656 0 0) (0.297656 1.19063 -0.051984) (14.5852 0 0) (14.5852 1.19063 -0.051984) (0.297656 100 -4.366094) (-0.297656 100 -4.366094) (-0.297656 1.19063 0.051984) (-14.5852 1.19063 0.051984) (0.297656 1.19063 0.051984) (14.5852 1.19063 0.051984) (0.297656 100 4.366094) (-0.297656 100 4.366094) ); blocks ( hex (0 1 2 3 0 1 10 11) (39 20 1) simpleGrading (0.04 0.3 1) hex (1 4 5 2 1 4 12 10) (10 20 1) simpleGrading (1 0.3 1) hex (4 6 7 5 4 6 13 12) (39 20 1) simpleGrading (25 0.3 1) hex (2 5 8 9 10 12 14 15) (10 395 1) simpleGrading (1 25 1) ); edges ( ); patches ( empty axis ( (0 1 1 0) (1 4 4 1) (4 6 6 4) ) wedge back ( (0 1 2 3) (0 1 10 11) (1 4 5 2) (1 4 12 10) ) wedge front ( (4 6 7 5) (4 6 13 12) (2 5 8 9) (10 12 14 15) ) patch lx_inlet ( (0 0 11 3) ) patch rx_inlet ( (6 6 7 13) ) wall top_flange ( (2 3 11 10) (9 2 10 15) ) wall btm_flange ( (7 5 12 13) (5 8 14 12) ) patch outlet ( (8 9 15 14) ) ); mergePatchPairs ( ); The axis of symmetry is along X, the radius along Y and the one cell thickness along Z. The mesh is quite corse and I do get the 'Severe skewness' warning, but I still expect the solution to be qualitatively correct. When I run the simulation, the result seem to be much like the flow between 2D flanged jets, as the velocity between the flanges seem to be constant along the radius. I also used another file, which gives the same result, but the FRONT and BACK (wedge) palnes are parallel for the flanges and at an angle for the jets. I am very likely doing some very stupid mistake, and would appreciate if you could help. Regards, Gianfilippo |
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March 22, 2007, 17:57 |
Hi all,
I am trying to simu
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#2 |
New Member
gianfilippo coppola
Join Date: Mar 2009
Posts: 14
Rep Power: 17 |
Hi all,
I am trying to simulate an axisymmetric opposed jet configuration, where each jet has a circular flange at its exit section. I am using icoFoam from FoamX and blockMesh to generate the mesh. The axis of symmetry is along X, the radius along Y and the one cell thickness along Z. I am getting the right Vx profile, but a Vy=0 and Vz non zero. Can someone comment on this, please ? Thanks Gianfilippo |
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