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

m.salemi · July 17, 2011, 08:14

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????

Abou ali · July 17, 2011, 09:08

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

ghorrocks · July 17, 2011, 19:41

http://www.cfd-online.com/Wiki/Ansys..._simulation.3F

m.salemi · July 20, 2011, 09:51

thanks a lot...

m.salemi · July 23, 2011, 16:26

How do I put the boundary condition of the centreline?

ghorrocks · July 24, 2011, 06:37

For 2D axisymmetric the geometry is a wedge with the point at the axis. There is no boundary condition at the centreline.

m.salemi · July 24, 2011, 07:32

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???

ghorrocks · July 24, 2011, 08:20

You have to generate the mesh as a 3D wedge to begin with. You started with a 2D rectangular region.

July 17, 2011, 08:14	importing & solving 2D model of pipe mesh in CFX 12.1(axisymmetric model)	#1
m.salemi New Member mamad Join Date: Aug 2010 Posts: 15 Rep Power: 15	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????

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July 17, 2011, 09:08		#2
Abou ali Member Join Date: Nov 2009 Posts: 49 Rep Power: 16	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
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	http://www.cfd-online.com/Wiki/Ansys..._simulation.3F

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

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

July 24, 2011, 06:37		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	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
m.salemi New Member mamad Join Date: Aug 2010 Posts: 15 Rep Power: 15	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
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	You have to generate the mesh as a 3D wedge to begin with. You started with a 2D rectangular region.