CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Solver for compressible flow calculations

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

Like Tree1Likes
  • 1 Post By bhanuday.sharma

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 17, 2015, 07:14
Default Solver for compressible flow calculations
  #1
New Member
 
Join Date: Jun 2014
Posts: 1
Rep Power: 0
remigius is on a distinguished road
Hi,
In my work I am modeling a compressible flow in Fluent and I am wondering if I can use pressure density solver. In my model I have a time dependent flow where the Mach number could reach a value about 2. As its is a transient simulation I first try to run a model in steady state to have a good starting point for the transient analysis
  • in steady state mode I have a Ma = 0.5 at inlet (i use pressure inlet boundary condition) and I use pressure based solver for calculations. The results I got are quite reasonable so it looks like the pressure based solver works well for this setup (beside that the fluent manual suggest to use pressure based solver to Ma <=0.3).
  • Anyway, when I switch to transient calculations i expect an increase in Mach number in a model (for very short time) to values about 2. I tried to use a density based solver, but it has a huge problems with stability, convergence and results when a mach number and velocity in the domain increases.
So finally my question is: Do you have any experience from applying pressure based solver for high speed compressible flows in fluent? Can I look for reasonable results?
remigius is offline   Reply With Quote

Old   June 19, 2015, 08:00
Default
  #2
New Member
 
Join Date: Jun 2011
Posts: 22
Rep Power: 14
sescobar is on a distinguished road
Both pressure and density based solver have the capability of calculating compressible high Mach number flows. If you want further advice, please provide details on your problem set up.
sescobar is offline   Reply With Quote

Old   June 24, 2015, 02:56
Default
  #3
New Member
 
Bhanuday Sharma
Join Date: Jun 2015
Posts: 18
Rep Power: 10
bhanuday.sharma is on a distinguished road
In early days of ansys, the density based solver was designed particularly for compressible flows. but now a day both solver works fine in both compressible and in compressible flows. But inherently sometimes density based solver yields better results than pressure based
villager likes this.
bhanuday.sharma is offline   Reply With Quote

Reply

Tags
compressible flow, fluent, mach number, pressure based solver

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Solver for an incompressible, turbulent flow with heat transfer tH3f0rC3 OpenFOAM Running, Solving & CFD 9 June 17, 2019 06:12
[ANSYS Meshing] Help with element size sandri_92 ANSYS Meshing & Geometry 14 November 14, 2018 07:54
thobois class engineTopoChangerMesh error Peter_600 OpenFOAM 4 August 2, 2014 09:52
ATTENTION! Reliability problems in CFX 5.7 Joseph CFX 14 April 20, 2010 15:45
Fatal over flow in solver Nandu CFX 5 September 16, 2002 07:19


All times are GMT -4. The time now is 06:12.