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

low speed compressible flow

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 15, 2005, 03:17
Default low speed compressible flow
  #1
lily
Guest
 
Posts: n/a
Hi:

I am a beginner of CFX and i want to run a simulation of two phase flow. In the help document of CFX there is such a sentence that "Multiphase flows allow low speed compressibility effects to be modeled and you can mix compressible and incompressible fluids in one simulation."

But, in general, low speed flow can be regard as incompressible flow and compressible flow just mean high speed flow. So I want to know, in CFX ,low speed compressibility flow can simulate how fast velocity?

Thank you!
  Reply With Quote

Old   November 16, 2005, 01:02
Default Re: low speed compressible flow
  #2
Nepal
Guest
 
Posts: n/a
Hi Lily Compressible or incompressible is not determined by velocity only ( most will say mach>0.3 is compressible). The major item is about DESITY. For example, if there's a hot solid (say 1000 degC) stay still in still air, but you can imagine there'll be very large density variation around it due to hot air, so it's a compressible flow.
  Reply With Quote

Old   November 16, 2005, 05:15
Default Re: low speed compressible flow
  #3
kk
Guest
 
Posts: n/a
Nepal:

Thank you for your explaine, But i still have some puzzle that whether i can simulate high speed flow with mixture model.
  Reply With Quote

Reply

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
Can OpenFOAM generate flow at the speed of light? Michel_sharp OpenFOAM 6 October 24, 2009 04:09
How to set Boundary in comepute low speed flow zuo FLUENT 3 June 4, 2009 16:44
Low Reynolds, compressible flow andre burdet Main CFD Forum 0 February 21, 2001 11:13
Solving unsteady compressible low speed flow atit Main CFD Forum 8 July 31, 2000 13:19
compressible channel flow.. R.D.Prabhu Main CFD Forum 0 July 17, 1998 17:23


All times are GMT -4. The time now is 16:55.