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

Regarding pressure projection method for unsteady viscous compressible flow

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

LinkBack Thread Tools Display Modes
Old   July 28, 2012, 06:15
Senior Member
sbaffini's Avatar
Paolo Lampitella
Join Date: Mar 2009
Location: Italy
Posts: 698
Blog Entries: 17
Rep Power: 21
sbaffini will become famous soon enough
Do you have access to this?

Moureau, Berat, Pitsch (2007): An efficient semi-implicit compressible solver for large-eddy simulations. Journal of Computational Physics 226

There you will find useful references on the projection method for incompressible (costant and variable density) flows, plus you will see how the method is adapted to handle some acoustic features.

However, i repeat it, it is very unlikely that the pressure-velocity coupling is causing you troubles in handling shocks. Indeed, i suggest you to actually use your current method (however the PISO from the Jasak's lecture notes is probably a better option than the SIMPLE) and look for something else causing your problems.

Still, i realize from you posting the Jasak's notes, that the modifications needed by a segregated solver to handle compressible flows are new to you. So, i guess if they are also new to your senior... in that case there could really be a problem in your SIMPLE implementation.
sbaffini is offline   Reply With Quote

Old   July 28, 2012, 06:55
Senior Member
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 3,252
Rep Power: 37
FMDenaro will become famous soon enoughFMDenaro will become famous soon enough
Originally Posted by avinash87 View Post
Then will you please guide me about classical pressure projection method for the same....? My senior did the same with SIMPLE algorithm and he got the results but method failed to capture shocks with good resolution. So i have to verify that whether pressure projection method can do better or not.

a failure in capturing schock with good resolution does not necessarily depends on the failure of the algorithm for compressible flows... maybe your spatial (and temporal) discretization is simply not good enough for problem with discontinuity
FMDenaro is offline   Reply With Quote


pressure projection

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
Compressible flow through a box at low pressure nbulleid OpenFOAM 1 January 20, 2011 06:15
Fixed grid methods for compressible viscous flow liujmljm Main CFD Forum 1 November 7, 2010 18:54
Using non-premixed model on compressible flow Libing FLUENT 0 November 10, 2005 19:39
pressure gradient term in low speed flow Atit Koonsrisuk Main CFD Forum 2 January 10, 2002 11:52
Method for Stokes flow with continuous pressure gradients? Matthew Cordery Main CFD Forum 0 August 31, 1998 17:58

All times are GMT -4. The time now is 06:24.