flow around circular cylinder...plz help

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

 March 21, 2006, 04:17 flow around circular cylinder...plz help #1 yousef Guest   Posts: n/a Hi, i'm trying to model a 2D external incompressible flow about a circular cylinder attached with two plates at the rear separeted by a distance of 0.86 of the cylinder diameter, the plate length equals the cylinder diameter. the Re is 8x10^4 (subcritical regime), and i want to model both an unconfined and a confined flow case. the confined flow case will be for the cylinder placed between two walls, the cylinder diameter is 47mm and the wall spacing is 300mm. can you guide me of what kind of mesh is best for this problem? what wall functions shall i use? which is best for the unconfined & the confined cases, the k-e or the RSM ot LES? what recommendations you suggest? i will highly appreciate your help? my problem is steady and i use Gambit for mesh generation. Any documents or pdf files you have and can support me? thank you alot in advance for your help.

 March 21, 2006, 09:35 Re: flow around circular cylinder...plz help #2 Ralf Schmidt Guest   Posts: n/a have a look at http://www.fluent.com/software/stude...l_cylinder.htm

 March 22, 2006, 03:57 Re: flow around circular cylinder...plz help #3 yousef Guest   Posts: n/a Thanks, i had a look at that example before, but it's simple and does not include the details i want particularly constructing the boundary layer and setting the proper wall function. besides, i have a big trouble in building the mesh in Gambit because of the plates attached at the rear of the cylinder.

 March 28, 2006, 08:26 Re: flow around circular cylinder...plz help #4 ayapan Guest   Posts: n/a it seems to be a real life application. this can be done only by you and by means of practice. or u cantact fluent engineer. bye

 March 28, 2006, 11:01 Re: flow around circular cylinder...plz help #5 Anindya Guest   Posts: n/a Try to use LES if you are comfortable with it. As you are trying 2D your meshing is simple. But 2D LES also has its limitations. But still the results should be better than k-e or RSM. Probably you can get better results if you try to extrude your mesh in the third direction and make it 3D and then use LES. Anindya

 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 Julian K. CFX 1 October 3, 2011 17:51 WolfgangS. OpenFOAM Running, Solving & CFD 1 December 6, 2010 03:48 Senthilkumar Main CFD Forum 2 April 19, 2009 23:18 Srinivas FLUENT 3 March 15, 2005 20:57 ram Main CFD Forum 5 June 17, 2000 21:31

All times are GMT -4. The time now is 00:24.