CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

cylinder in 2d

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 9, 2006, 21:02
Default cylinder in 2d
  #1
juliana pesma
Guest
 
Posts: n/a
Dear all,

I am trying to model a simple pipe flow. I was wondering if a cylindrical object can be accurately modelled in 2dimensions? i.e. the cross section becomes a rectangle.

How do we account for the rounded sides? wouldn't it become like a rectangular box beam in 3d? How can i use cylindrical coordinates to rectify this problem and model a cylinder in 2d? Thanks a lot

best regards Juliana
  Reply With Quote

Old   March 10, 2006, 02:50
Default Re: cylinder in 2d
  #2
kharicha
Guest
 
Posts: n/a
Use the axisymmetric model of fluent. be carefull on the fact that the axis of symmetry of your cylinder should be the x coordinate....and the radial the y coordinate.
  Reply With Quote

Old   March 10, 2006, 04:58
Default Re: cylinder in 2d
  #3
Ravi Duggirala
Guest
 
Posts: n/a
Hi, when you are modeling a cylinder flow then the boundary conditions you might use are axisymmetric which wont make the 2D problem as rectangular box beam in 3D.

hope it clarified your doubt Regards Ravi Duggirala
  Reply With Quote

Old   March 11, 2006, 09:15
Default Re: cylinder in 2d
  #4
juliana pesma
Guest
 
Posts: n/a
hi I am sorry. 1) how do I activate the axisymmetric model in fluent? 2) if my cylinder is later modified to pipe inclined at some angle, can still use axisymmetric model?

Thanks a lot!' juliana
  Reply With Quote

Old   July 18, 2012, 17:03
Default antisymmetric cylinder
  #5
New Member
 
Join Date: Nov 2011
Posts: 4
Rep Power: 14
naderafshar is on a distinguished road
Dear all
I have a Tjunction tube that 2 phases ( air and water) get in from two inlets and mix. I want to model this in 2D but this problem is not symmetric so I could not use axisymmetric condition please help me
naderafshar is offline   Reply With Quote

Old   July 19, 2012, 05:37
Default
  #6
Senior Member
 
Marion
Join Date: Jul 2012
Location: France
Posts: 122
Rep Power: 14
Marion is on a distinguished road
Hi,
If your geometry doesn't have an axis of symmetry you cannot use the 2D axisymmetric model. Especially if you want to have the water coming from 1 side and the air coming from the other side.
You could try a standard 2D model, but then you won't be modelling pipes, as the Z direction will be infinite.
for a T-junction pipe, I am afraid 3D is your only option.
Marion.
Marion is offline   Reply With Quote

Old   May 24, 2023, 11:18
Default Simulation of unsteady laminar vortex shedding of flow past a circular cylinder
  #7
New Member
 
Muhammad Imran
Join Date: May 2023
Posts: 1
Rep Power: 0
Imran123 is on a distinguished road
Hi
I am try to simulate the unsteady laminar vortex shedding of flow past a circular cylinder but i didn't complete this
Help me

Last edited by Imran123; May 24, 2023 at 11:20. Reason: Due to incomplete question
Imran123 is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
benchmark: flow over a circular cylinder goodegg Main CFD Forum 12 January 22, 2013 12:47
Incorrect Drag and Drag Coefficient for flow over a cylinder ozzythewise Main CFD Forum 8 June 13, 2012 07:24
[blockMesh] Specifying boundary faces failes in blockMesh blaise OpenFOAM Meshing & Mesh Conversion 0 May 10, 2010 04:56
rotating cylinder using sliding mesh Tim Daly FLUENT 1 November 10, 2008 00:02
Turbulent steady flow around a circular cylinder Mirek Kabacinski FLUENT 0 July 23, 2003 19:40


All times are GMT -4. The time now is 10:53.