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

Conservative form of N-S equation for incompressible flow and sharp interface

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 5, 2013, 03:50
Default Conservative form of N-S equation for incompressible flow and sharp interface
  #1
New Member
 
SM Yeon
Join Date: Jun 2011
Posts: 9
Rep Power: 6
doctorWho is on a distinguished road
I have some questions. I am learning CFD.

I heard that in single-phase flow, non-conservative form of N-S equations gives inaccurate results. Could you explain why?

I heard that in two-phase flow with sharp interface, conservative form of N-S equations won't work due to numerical instability near interface. is the instability caused by ill-posedness of matrix in Poisson equation? Could you explain in detail?

If conservative form of N-S equation does not work in two-phase flow with sharp interface, then is it possible to mix conservative and non-conservative form of N-S equations in a way that conservative form deals with deep flow and non-conservative form deals with near sharp interface? If possible, could you show me some literatures?

Thanks in advance.
doctorWho is offline   Reply With Quote

Old   November 5, 2013, 06:53
Default
  #2
Senior Member
 
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 2,254
Rep Power: 28
FMDenaro will become famous soon enoughFMDenaro will become famous soon enough
Quote:
Originally Posted by doctorWho View Post
I have some questions. I am learning CFD.

I heard that in single-phase flow, non-conservative form of N-S equations gives inaccurate results. Could you explain why?

I heard that in two-phase flow with sharp interface, conservative form of N-S equations won't work due to numerical instability near interface. is the instability caused by ill-posedness of matrix in Poisson equation? Could you explain in detail?

If conservative form of N-S equation does not work in two-phase flow with sharp interface, then is it possible to mix conservative and non-conservative form of N-S equations in a way that conservative form deals with deep flow and non-conservative form deals with near sharp interface? If possible, could you show me some literatures?

Thanks in advance.
Hi,
just check for some previous discussions about this issue, you will find many details
FMDenaro is offline   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
Using MULES to solve transport equation with sharp interface derkermit OpenFOAM Programming & Development 3 February 27, 2014 07:37
how to set BC for flow at a sharp open-channel junction? ntchuyen OpenFOAM Pre-Processing 3 July 18, 2013 06:57
no sharp interface Andy Chen FLOW-3D 1 December 20, 2009 04:46
Flow near sharp corners Harish Main CFD Forum 4 February 21, 2007 22:55
Question on 3D potential flow Adrin Gharakhani Main CFD Forum 13 June 21, 1999 05:18


All times are GMT -4. The time now is 18:50.