# Could it be possible to do LES on a prototype geometry

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

 March 2, 2006, 15:48 I have a tank with dimensions #1 Senior Member   Xiaofeng Liu Join Date: Mar 2009 Location: State College, PA, USA Posts: 118 Rep Power: 8 I have a tank with dimensions of 20m long, 5m wide and 3m deep. Is it possible to do a LES simulation on it? I know it would be extremely expensive and will take a very very long time. I have access to supercomputer resource. But still I have no idea wether this would be crazy. I know many of you have experience on LES. Any information will be good. __________________ Xiaofeng Liu, Ph.D., P.E., Assistant Professor Department of Civil and Environmental Engineering Penn State University 223B Sackett Building University Park, PA 16802 Web: http://water.engr.psu.edu/liu/

 March 2, 2006, 16:01 Whats in the tank? #2 Senior Member   Eugene de Villiers Join Date: Mar 2009 Posts: 725 Rep Power: 12 Whats in the tank?

 March 2, 2006, 16:12 What's the Reynolds number? #3 Member   Pierre Le Fur Join Date: Mar 2009 Location: UK Posts: 60 Rep Power: 8 What's the Reynolds number?

 March 2, 2006, 16:12 For test, only water is consid #4 Senior Member   Xiaofeng Liu Join Date: Mar 2009 Location: State College, PA, USA Posts: 118 Rep Power: 8 For test, only water is considered. If it's feasible, some particles will be added into it. I am interested in the density current. __________________ Xiaofeng Liu, Ph.D., P.E., Assistant Professor Department of Civil and Environmental Engineering Penn State University 223B Sackett Building University Park, PA 16802 Web: http://water.engr.psu.edu/liu/

 March 2, 2006, 16:18 Considering the dimensions, Re #5 Senior Member   Xiaofeng Liu Join Date: Mar 2009 Location: State College, PA, USA Posts: 118 Rep Power: 8 Considering the dimensions, Reynolds number should be very big. The inlet velocity is in the order of 0.02m/s. So Re=0.02*20/1E-6=4E+5. __________________ Xiaofeng Liu, Ph.D., P.E., Assistant Professor Department of Civil and Environmental Engineering Penn State University 223B Sackett Building University Park, PA 16802 Web: http://water.engr.psu.edu/liu/

 March 2, 2006, 18:50 I doubt very much your largest #6 Senior Member   Eugene de Villiers Join Date: Mar 2009 Posts: 725 Rep Power: 12 I doubt very much your largest length scale will be 20m in a 20x5x3 tank. Even so, I have done LES (DES actually) of a complete automobiles at 140km/h with OpenFOAM. Thats a Re of ~40*5/1.4e-5 = 14e6. So go ahead, I don't think you will need a supercomputer though.

 March 2, 2006, 22:08 That's a good news. I will g #7 Senior Member   Xiaofeng Liu Join Date: Mar 2009 Location: State College, PA, USA Posts: 118 Rep Power: 8 That's a good news. I will go ahead to give it a try. __________________ Xiaofeng Liu, Ph.D., P.E., Assistant Professor Department of Civil and Environmental Engineering Penn State University 223B Sackett Building University Park, PA 16802 Web: http://water.engr.psu.edu/liu/

 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 ivanyao OpenFOAM Paraview & paraFoam 3 December 20, 2007 23:58 Arjun FLUENT 6 August 20, 2007 04:15 Naveed. FLUENT 0 April 13, 2006 05:19 CFX 4.4 users CFX 0 February 1, 2005 05:57

All times are GMT -4. The time now is 08:14.