CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

Density Ratio

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 20, 2005, 07:16
Default Density Ratio
  #1
Compressibility
Guest
 
Posts: n/a
hello,

in a high speed compressible flow where there may be shocks forming, what size density ratios might i get?

would these density ratios be bigger than i would get in a low speed combustion system?

thanks
  Reply With Quote

Old   August 20, 2005, 18:29
Default Re: Density Ratio
  #2
Jim_Park
Guest
 
Posts: n/a
Get an aerodynamcis or fluids book from your library, go to the supersonic chapters, and find some of the simple flows that can be solved analytically - with your electronic calculator (or slide rule).

Put some numbers in and calculate the density ratio (also pressure and temperature ratios) across a shock. And you can calculate the shock location. Now you have your answer - and the first test case for your code!
  Reply With Quote

Old   August 21, 2005, 18:24
Default Re: Density Ratio
  #3
Compressibility
Guest
 
Posts: n/a
your answer is not overly helpful for a beginner in the subject ...
  Reply With Quote

Old   August 21, 2005, 19:27
Default Re: Density Ratio
  #4
Ahmed
Guest
 
Posts: n/a
I disagree with you, Jim Park gave you the most correct answer, do your home work and learn the basics
  Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
pressure eq. "converges" after few time steps maddalena OpenFOAM Running, Solving & CFD 69 July 21, 2011 08:42
Discrete scheme for VOF method in Large Density Ratio waynezw0618 OpenFOAM Running, Solving & CFD 0 August 11, 2008 10:46
Problem on high density ratio in Level Set method Kai Yan Main CFD Forum 10 December 25, 2007 07:12
REAL GAS UDF brian FLUENT 6 September 11, 2006 09:23
Warning 097- AB Siemens 6 November 15, 2004 05:41


All times are GMT -4. The time now is 07:31.