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Showing results 1 to 19 of 19 Search took 0.00 seconds. Search: Posts Made By: Daniele111

Forum: OpenFOAM Running, Solving & CFD September 20, 2010, 12:54

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 hi I return on this problem. I must try to... hi I return on this problem. I must try to solve it with a monoblock grid instead of a multiblock grid. The problem isn't the separation a use obstacle with high aspect ratio, and I haven't...

Forum: OpenFOAM Running, Solving & CFD July 12, 2010, 08:27

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 No. I didn't change the shape of th obstacle, I... No. I didn't change the shape of th obstacle, I divide my domain i four hex in my blockMeshDict, so near the vertex where start the step I have more cell. The cell number, two or three, aren't the...

Forum: OpenFOAM Running, Solving & CFD July 12, 2010, 08:15

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 Uhmm I don't understand your question. Sorry Uhmm I don't understand your question. Sorry

Forum: OpenFOAM Running, Solving & CFD July 12, 2010, 07:46

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 My English is very bad!:p In my previous mesh... My English is very bad!:p In my previous mesh near the slope i have only two cell. In my new cell three. Three cell with at least a vertex shared with the vertex where th obstacle changes its slope.

Forum: OpenFOAM Running, Solving & CFD July 12, 2010, 07:36

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 No because the three cell near the slope has... No because the three cell near the slope has different areas the solution is bad

Forum: OpenFOAM Running, Solving & CFD July 12, 2010, 07:24

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 I eliminate the overshooting I change mesh add a... I eliminate the overshooting I change mesh add a cell where the shape change slope

Forum: OpenFOAM Running, Solving & CFD July 9, 2010, 10:23

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 I try to use with my case the mesh of pitzDaily... I try to use with my case the mesh of pitzDaily tutorials, I only change mesh, and in this case a I haven't overshooting on step. Why on my mesh is there this overshooting?

Forum: OpenFOAM Running, Solving & CFD July 8, 2010, 18:29

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 I used a vertical step in my profile and this is... I used a vertical step in my profile and this is the wall shear stress at bottom, They seem numerical error, because if I refine the mesh on chenge of shape don't change anything.

Forum: OpenFOAM Running, Solving & CFD July 8, 2010, 14:32

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 Refined mesh. Then I'll post the simulation... Refined mesh. Then I'll post the simulation results

Forum: OpenFOAM Running, Solving & CFD July 8, 2010, 13:16

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 I use wall function, with the mesh that I post.... I use wall function, with the mesh that I post. The y+ was more or less 800, now I change the mesh and it is 150

Forum: OpenFOAM Running, Solving & CFD July 8, 2010, 12:36

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 How can do it? What is the correct range for the... How can do it? What is the correct range for the k-eps model? Thanks you

Forum: OpenFOAM Running, Solving & CFD July 8, 2010, 12:02

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 The correct data are: 2D domain along x (main... The correct data are: 2D domain along x (main flow direction) 1000 cells along y 100 cells along z 1 cells

Forum: OpenFOAM Running, Solving & CFD July 8, 2010, 10:28

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 I tried to refine the mesh but the overshooting... I tried to refine the mesh but the overshooting don't disappear. I used 5000 cell over a 500 m domain.

Forum: OpenFOAM Running, Solving & CFD July 6, 2010, 12:05

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 Yes, but if you consider the backward-facing step... Yes, but if you consider the backward-facing step the wall shear stress haven't overshooting

Forum: OpenFOAM Running, Solving & CFD July 6, 2010, 10:28

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 Yes I used it, but I have the same error, I'm... Yes I used it, but I have the same error, I'm traying to eliminate the stress overshooting but I don't understand where is th problem

Forum: OpenFOAM Running, Solving & CFD July 6, 2010, 09:58

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 Thanks If I use Gauss linear there isn't error Thanks If I use Gauss linear there isn't error

Forum: OpenFOAM Running, Solving & CFD July 6, 2010, 08:18

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 I'm trying to use this Grad scheme in my fvSchems... I'm trying to use this Grad scheme in my fvSchems gradSchemes { default Gauss upwind; } But I have this error when simulation start

Forum: OpenFOAM Running, Solving & CFD July 6, 2010, 06:40

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 No idea for this problem? No idea for this problem?

Forum: OpenFOAM Running, Solving & CFD July 3, 2010, 07:27

Replies: 31 Recirculation bubble and wall shear stress Views: 5,139 Posted By Daniele111 Recirculation bubble and wall shear stress hi I'm simulating an atmospheric boundary layer with a perturbation (an obstacle) on the bottom of domain. Downstream of the obstacle there is a Recirculation bubble, and i want to calculate the...

Showing results 1 to 19 of 19

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