# Setting Fluent Problem

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

 June 2, 2006, 06:05 Setting Fluent Problem #1 Himanshu Sharma Guest   Posts: n/a Hi , i am doing a project and the first step is benchmarking: for this we have to find drag coefficient C_d for Re=100 over cylinder of diameter 10 mm, i have created the mesh, and after solving after 100-200 iteration where convergence crtiera is met, the results are quite different from the experimental result can someone pls explain it. Or how do i set up conditions in Fluent for the above problem of cylinder

 June 2, 2006, 12:30 Re: Setting Fluent Problem #2 Jason Guest   Posts: n/a 100-200 iterations for convergence? Sounds like you're using the default values of 1e-3. You can't just go by the residuals. You need to monitor fundamental quantities (like Drag, max pressure, min pressure) to make sure they are converged. These can be found under Solve->Monitors. You can decrease the limit for the residual convergence by going to Solve->Monitors->Residuals. Other things to watch out for: Make sure you've set your reference values (Report->Reference Values). Check the quality of your mesh in Gambit (or whatever meshing program you use) to make sure that you're skewness is low. And make sure that you're refined enough around the sphere (several cells within the boundary layer... do planar cuts through the geometry in Fluent and look at the BL). Hope this helps, and good luck, Jason

 June 5, 2006, 07:47 Re: Setting Fluent Problem #3 Richard Guest   Posts: n/a one question: is it laminar or turbulent flow? have you used a steady solver? my blog: http://richard001.blogspot.com/

 June 5, 2006, 07:50 Re: Setting Fluent Problem #4 Himanshu Sharma Guest   Posts: n/a its laminar and unsteadt model, if possible can u look at the meshing, is it good or bad i am just a beginer http://www.home.iitk.ac.in/~himan

 June 5, 2006, 08:02 Re: Setting Fluent Problem #5 Richard Guest   Posts: n/a I can not open your webpage sorry. however, you can just send me it by email. my blog: http://richard001.blogspot.com/

 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 josip76 FLUENT 0 May 26, 2011 20:08 MikeTichondrius ANSYS Meshing & Geometry 1 February 9, 2011 14:31 winnawinna FLUENT 0 December 29, 2010 00:32 hbinma FLUENT 3 July 6, 2008 10:49 Yurong FLUENT 3 January 15, 2006 11:57

All times are GMT -4. The time now is 09:14.