3D Pipe Model for Fluent4.5
Can anyone help?
I am trying to generate a 3d structured mesh using Gambit. The objective is to model multiphase flow in a 3d pipe in Fluent4.5. I've tried: (1) Generating a mapped volume mesh in Gambit (not suitable for Fluent4.5) (2) Decomposing the geometry into two half cylinders and joining the meshed volumes (3) Extruding a face mesh to create a volume. None of these have worked because rotationally cyclic 3D geometries need (a) Zaxis as the centreline (b) a finite Inner Radius (which eliminates the possible use of a symmetry boundary for a half cylinder) Can anyone help recommend a way of generating a 3d cylindrical structured mesh for a simple pipe geometry to be used in Fluent4.5? Thanks. Elvin. 
Re: 3D Pipe Model for Fluent4.5
(1). I am not using the code. But I think you can first generate a 2D structured mesh and rotate it along the axis to generate a 3D structured mesh. (2). Similar to the cylindrical coordinates system. First, in the zr plane, you create a long rectangular domain and generate a structured mesh. Then, define the axis, and rotate the domain and the mesh to create the 3D structured mesh for the pipe.

Re: 3D Pipe Model for Fluent4.5
Hi,
I assume from your email address that you are from a university ? If so then for a discounted rate (800GBP) you could purchase a new mesh generation tool. If you have a regular requirement for fully structured meshes then investing in ICEM CFD (www.icemcfd.com) could save you a lot of time in the long term. You could then also use your mesh with any of the 100 supported solver formats. I hope this helps and good luck regards David 
Re: 3D Pipe Model for Fluent4.5
The best structured mesh for such a domain would be an O type mesh. You can create such a mesh in Gambit with few steps : 1) Divide the cylindericl volume in four volumes using a brick, 2) ensure that two of the volumes are "disconnected" at one interface 3) mesh each volume with wedge/hex elements.
Please see the "FAQ" available through online help of Gambit, for more details along with a sample journal file. 
Re: 3D Pipe Model for Fluent4.5
Dear Elvin
I think that you can acheive your purpose by using following commands, by 'text user interface' of Fluent 4.x. S1(setup 1) > MG(Manipulate Grid) > 3Dfrom2D S1 > MG > SWAP IJK (if necessary) S1 > MG > SWAP XYZ (if necessary) Sincerely, Jinwook 
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