# 'Von Karman Vortex Street' Modelling

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 December 16, 2011, 12:11 'Von Karman Vortex Street' Modelling #1 New Member   Alex Join Date: Dec 2011 Posts: 5 Rep Power: 7 Sponsored Links Hello! Could you please give me an advise. I would like to solve this problem numerically by myself ('Von Karman Vortex Street' modelling). Where is it possible to find a most clear explanation how to do it? What is a boundary conditions and etc. I need an explanation/description sufficient to write the program on any programming language. Ideally I want to obtain a movie like this: http://www.youtube.com/watch?v=0z_hF...ature=youtu.be Thank you in advance!

 December 16, 2011, 13:01 #2 Member   Kailash Join Date: May 2011 Location: London, UK Posts: 45 Rep Power: 8 You have to try and program a Incompressible N-S solver. You can find source codes of simple 2D incompressible NS solvers developed for lid driven cavity problem in many standard text books. The numerical algorithm, boundary conditions, visualisation etc can be also found. That can be easily extended to your problem of interest. Here is an example for such solvers, http://www-math.mit.edu/cse/codes/mi...vierstokes.pdf

 December 27, 2011, 13:12 #3 New Member   Alex Join Date: Dec 2011 Posts: 5 Rep Power: 7 Thank you! I am trying to cope with this code. It's written in the beginning of chapter 4: 'The general approach of the code is described in Section 6.7 in the book Computational Science and Engineering [4]' I tried to find this one. Do you know, which method was used? It seems to be well known method for professionals, but I am a beginner. Where I can find more explanations how it has been done? I mean these three stages: 1. Treat nonlinear terms. 2. Implicit viscosity 3. Pressure correction. There are separate equations for -(U^2)x - (UV)y and 1/Re * (Uxx + Uyy), Nonlinear terms are treated explicitly and the viscosity terms are treated implicitly and etc.. I see what's going on (in the paper) but I don't know why and how. I need a general explanation for this (exactly for this appr., which is in this paper) approach/scheme. Could you please write where is it possible to find? Thank you in advance! PS: I FOUND AN ANSWER, THIS IS A PRESSURE-CORRECTION SCHEME, BUT I CAN'T DELETE THIS POST Last edited by zedik; December 27, 2011 at 14:22.

 December 29, 2011, 02:40 hello #4 Senior Member   cfdkid Join Date: Mar 2009 Posts: 133 Rep Power: 10 hi , Would you consider using OpenFOAM for this? If yes then i could be of your help. Regards, kid

 December 30, 2012, 14:30 #5 New Member   Alex Join Date: Dec 2011 Posts: 5 Rep Power: 7 hi Yes, it would be great. Last edited by zedik; December 31, 2012 at 11:33.

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