# cylinder in 2d

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

 March 9, 2006, 21:02 cylinder in 2d #1 juliana pesma Guest   Posts: n/a Sponsored Links 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

 March 10, 2006, 02:50 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.

 March 10, 2006, 04:58 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

 March 11, 2006, 09:15 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

 July 18, 2012, 16:03 antisymmetric cylinder #5 New Member   Join Date: Nov 2011 Posts: 3 Rep Power: 7 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

 July 19, 2012, 04:37 #6 Senior Member   Marion Join Date: Jul 2012 Location: France Posts: 122 Rep Power: 8 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.

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post goodegg Main CFD Forum 12 January 22, 2013 12:47 ozzythewise Main CFD Forum 8 June 13, 2012 06:24 blaise OpenFOAM Meshing & Mesh Conversion 0 May 10, 2010 03:56 Tim Daly FLUENT 1 November 10, 2008 00:02 Mirek Kabacinski FLUENT 0 July 23, 2003 18:40