CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

A good algo for a compressible NS

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

LinkBack Thread Tools Display Modes
Old   October 6, 1999, 15:49
Default A good algo for a compressible NS
Posts: n/a
Hello. I am solving the flow past n cylinders placed axis parallel. The flow is a compressible, viscous flow. Can you suggest good schemes for solving this. I will be starting with a single cylinder first. I have limited computational power.. A pentium computer with 32Mb ram. So please take that into account too.

  Reply With Quote

Old   October 7, 1999, 08:19
Default Re: A good algo for a compressible NS
Axel Rohde
Posts: n/a
I am currently solving the exact problem as part of my dissertation. Compressible viscous flow over single cylinder, both fixed and rotating. Mach number 0.5, Reynolds number 350,000 based on a diameter of 0.04m at low ambient pressure 700hPa (1013hPa is sea level).

I am using Harten's UTL1C TVD algorithm on a curvilinear grid for the inviscid part and central differences for the viscous portion of the computation. I have a Pentium processor (200Mhz) with 128MB of RAM. For a 60 by 60 mesh, the computation takes between 1 to 2 days, because of the boundary layer resolution ( delta/dia ~ Re^-0.5 ).

I would give you the source code, but I am planning to turn this into a commercial software package next year. What Mach number and Reynolds number are you looking for? I may be able to run one test for you.

I will send you a GIF image of one of my rotating cylinders.

Your biggest task will be the grid generation for multiple cylinders. Do you have a program for that?

Take care,

Axel Rohde

  Reply With Quote

Old   October 7, 1999, 11:11
Default Re: A good algo for a compressible NS
clifford Bradford
Posts: n/a
if you have limited computational resources an explicit scheme like jameson's 4 step runge kutta scheme is appropriate. you should note that he made improvements to the scheme (the artificial dissipation) since his 1981 paper that most people reference
  Reply With Quote


Thread Tools
Display Modes

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Compressible Boundary Condition in mid-filed EdiVaD FLUENT 1 March 7, 2011 05:52
easy educational compressible navier stokes implementation anywhere? Boogiwoogie Main CFD Forum 0 December 19, 2010 07:32
dynOneEqEddy for Compressible Flow deji OpenFOAM 2 November 17, 2010 06:57
Fixed grid methods for compressible viscous flow liujmljm Main CFD Forum 1 November 7, 2010 18:54
Compressible vs. Incompressible formulations Fernando Velasco Hurtado Main CFD Forum 3 January 7, 2000 17:51

All times are GMT -4. The time now is 09:13.