'Von Karman Vortex Street' Modelling

zedik · December 16, 2011, 11:11

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!

k_k · December 16, 2011, 12:01

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

zedik · December 27, 2011, 12:12

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

kid · December 29, 2011, 01:40

hi ,
Would you consider using OpenFOAM for this?
If
yes
then i could be of your help.

Regards,
kid

zedik · December 30, 2012, 13:30

hi
Yes, it would be great.

December 16, 2011, 11:11	'Von Karman Vortex Street' Modelling	#1
zedik New Member Alex Join Date: Dec 2011 Posts: 5 Rep Power: 14	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 27, 2011, 12:12		#3
zedik New Member Alex Join Date: Dec 2011 Posts: 5 Rep Power: 14	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 13:22.

December 29, 2011, 01:40	hello	#4
kid Senior Member cfdkid Join Date: Mar 2009 Posts: 133 Rep Power: 17	hi , Would you consider using OpenFOAM for this? If yes then i could be of your help. Regards, kid

December 30, 2012, 13:30		#5
zedik New Member Alex Join Date: Dec 2011 Posts: 5 Rep Power: 14	hi Yes, it would be great. Last edited by zedik; December 31, 2012 at 10:33.

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December 16, 2011, 12:01		#2
k_k Member Kailash Join Date: May 2011 Location: London, UK Posts: 45 Rep Power: 14	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