# importing & solving 2D model of pipe mesh in CFX 12.1(axisymmetric model)

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 July 17, 2011, 08:14 importing & solving 2D model of pipe mesh in CFX 12.1(axisymmetric model) #1 New Member   mamad Join Date: Aug 2010 Posts: 15 Rep Power: 6 Hi, I work in modeling turbulence 2phase flow in a pipe,can i use 2D model for my soloution???and how can i import 2D mesh with axisymmetric condition in cfx????

 July 17, 2011, 09:08 #2 Member   Join Date: Nov 2009 Posts: 49 Rep Power: 7 Hi, Take a look on CFX help: ANSYS CFX-Solver Modeling Guide | Advice on Flow Modeling | Modeling 2D Problems And the related tutorials: Tutorial 6: Buoyant Flow in a Partitioned Cavity Tutorial 8: Supersonic Flow Over a Wing

 July 17, 2011, 19:41 #3 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 10,823 Rep Power: 85

 July 20, 2011, 09:51 #4 New Member   mamad Join Date: Aug 2010 Posts: 15 Rep Power: 6 thanks a lot...

 July 23, 2011, 16:26 #5 New Member   mamad Join Date: Aug 2010 Posts: 15 Rep Power: 6 How do I put the boundary condition of the centreline?

 July 24, 2011, 06:37 #6 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 10,823 Rep Power: 85 For 2D axisymmetric the geometry is a wedge with the point at the axis. There is no boundary condition at the centreline.

 July 24, 2011, 07:32 #7 New Member   mamad Join Date: Aug 2010 Posts: 15 Rep Power: 6 thanks a lot ghorrocks for your reply... but the geometry that i simulate is a pipe with 1m lenght and 0.01m diameter,and i mesh 2D a rectangular in XY plane with 1m lenght and 0.005m width with ANSYS MESH and i creat boundry name for top edge as wall and left edge as inlet and right edge as outlet. when i import mesh in cfx and revolve 5 deg,some new boundry as periodic1 and wall surface_body was created that periodic1 shows the high and low theta surface and wall surface_body shows the centerline and i define boundry condition for inlet,outlet,wall and symmetry for high and low theta surface,so when i want to define run,i have some error as "the wall surface_body is not set in boundry condition" do yo know the problem???

 July 24, 2011, 08:20 #8 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 10,823 Rep Power: 85 You have to generate the mesh as a 3D wedge to begin with. You started with a 2D rectangular region.

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