CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Sound Speed Extimation

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

LinkBack Thread Tools Display Modes
Old   June 9, 2003, 06:06
Default Sound Speed Extimation
Posts: n/a
Hi Everybody,

I'm simulating train entrance in a tunnel using Sliding Meshes.

I'm solving EULER EQUATIONS with both SECOND ORDER discretization scheme in time and flow equations; Pressure Far Field Boundary Conditions.

I'm using COUPLED IMPLICIT SOLVER on a structured Mesh.

The Time step to Cell Dimension Ratio has been choosen so that:

Dx/Dt > c (Sound Speed)

Yet, when I post process my simulation I find that pressure waves Travel in the tunnel at 318 m/s.....

What do you think about it ??

Thanks in advance,

  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
Speed of sound Mohamed Mostafa FLUENT 3 March 18, 2011 06:39
Speed of sound (mesh movement) AliAli CFX 5 October 18, 2009 07:12
speed of sound panel in VOF model bohis FLUENT 2 February 20, 2009 11:36
Abt: the speed of sound in incompressible flows jinwon park Main CFD Forum 3 August 21, 2008 20:44
negative speed of sound Bearcat Main CFD Forum 5 August 6, 2008 12:55

All times are GMT -4. The time now is 12:27.