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-   -   grid manipulation and applying boundary conditions (http://www.cfd-online.com/Forums/fluent/27849-grid-manipulation-applying-boundary-conditions.html)

 Chetan Kadakia August 20, 2000 23:03

grid manipulation and applying boundary conditions

I am a new Fluent user. I have imported a mesh from ANSYS into Fluent. But I the mesh has only two zones: exterior and interior. The 2-D mesh is a cirle in a square. I need to apply boundary conditions to each wall of the square, and to the boundary of the circle. I need to simulate flow over a cylinder in 2-D where I have a top and bottom wall, a flow entrance and exit. How do I manipulate my grid, to obtain surfaces and zones that will allow me to place these boundary conditions.

 Rüdiger Schwarze August 22, 2000 02:58

Re: grid manipulation and applying boundary condit

The boundaries of Your problem (inlet, outlet, walls) are grouped together in the exterior zone. You have to split this zone (grid/seperate/faces) and to change the boundary zone types (define/boundary conditions).

 Chetan Kadakia August 22, 2000 04:07

Re: grid manipulation and applying boundary condit

Yes, but how do I proceed from grid/separate/faces? Do I need to learn how to apply marks and separate that way? I am having trouble from the point you recommended.

 Rüdiger Schwarze August 22, 2000 04:51

Re: grid manipulation and applying boundary condit

Yes, I think so! Try the feature "mark" in order to separate the square and the circle. You can apply marks via adapt/region. Then divide up the different zones of the square using "angle"

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