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

Pressure Poisson Equation: is NASA-VOF2D or RIPPLE correct?

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

LinkBack Thread Tools Display Modes
Old   December 9, 2010, 01:26
Question Pressure Poisson Equation: is NASA-VOF2D or RIPPLE correct?
New Member
James Zhong
Join Date: Mar 2009
Posts: 25
Rep Power: 10
James is on a distinguished road
Hi everyone,

In NASA-VOF2D, the Pressure Poisson Equation is given by:
(dt/rho) div(grad(p(n+1))) = div(u_tilde)
Here rho is treated as constant.

In RIPPLE, the Pressure Poisson Equation takes the form of:
div(grad(p(n+1))/rho) = div(u_tilde)/dt
Here the variation of density in the free surface region is considered. So which formulation is correct (or better)? Thanks!

James is offline   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
Calculation of the Governing Equations Mihail CFX 7 September 7, 2014 06:27
Strcture of pressure correction equation in PISO stable over time ? sebi Main CFD Forum 1 October 26, 2010 22:19
FFT solver for Poisson equation mranji1 Main CFD Forum 1 November 16, 2009 02:12
Two-Phase Buoyant Flow Issue Miguel Baritto CFX 4 August 31, 2006 12:02
FEM pressure poisson equation (Implicit) cfd-beginner Main CFD Forum 0 August 9, 2005 13:32

All times are GMT -4. The time now is 18:01.