CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Poisson Solver in STAR?

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 13, 2019, 15:18
Post Poisson Solver in STAR?
  #1
Member
 
Pierce
Join Date: May 2019
Posts: 40
Rep Power: 7
PierceH is on a distinguished road
Are there anyways to solve a poisson equation in STAR, is there a built in solver or a way of tricking one into it using passive scalars or something similar?

I want to solve the following equation in order to resolve pressure:


laplacian(Pressure)=-rho*laplacian(0.5q.q)+grad(rho*q x omega)


If anyone has any experience with this it would be very helpful
PierceH is offline   Reply With Quote

Old   June 18, 2019, 02:17
Smile
  #2
Senior Member
 
ashokac7's Avatar
 
Ashok Chaudhari
Join Date: Aug 2016
Location: Pune, India
Posts: 260
Rep Power: 10
ashokac7 is on a distinguished road
Send a message via Skype™ to ashokac7
Quote:
Originally Posted by PierceH View Post
Are there anyways to solve a poisson equation in STAR, is there a built in solver or a way of tricking one into it using passive scalars or something similar?

I want to solve the following equation in order to resolve pressure:


laplacian(Pressure)=-rho*laplacian(0.5q.q)+grad(rho*q x omega)


If anyone has any experience with this it would be very helpful

You could do this with User Codes. Please refer Star-CCM+ user guide for this. Poisson solver is already there in CCM in Electro-Magnitic field distribution. (Maxwell's equation of electrostatics) But electric potential is as a variable. So you can't use this for variable as Pressure.

Hope this helps.
ashokac7 is offline   Reply With Quote

Old   June 18, 2019, 08:59
Default
  #3
Member
 
Pierce
Join Date: May 2019
Posts: 40
Rep Power: 7
PierceH is on a distinguished road
Quote:
Originally Posted by ashokac7 View Post
You could do this with User Codes. Please refer Star-CCM+ user guide for this. Poisson solver is already there in CCM in Electro-Magnitic field distribution. (Maxwell's equation of electrostatics) But electric potential is as a variable. So you can't use this for variable as Pressure.

Hope this helps.
Ashokac,

Thanks for the advice. My logic was to follow passive scalars where in steady flow the transient term would settle to a 0 value and you could turn off the convection term leaving you with just diffusion and a source term. However, this equation is behaving as I would expect, setting the flow to laminar and Schmidt number to one if you multiply your source term by \mu then you should conceivably obtain a Poisson solver.
PierceH is offline   Reply With Quote

Reply

Tags
passive scalar, pde, poisson equation, solve pressure

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
[ANSYS Meshing] Help with element size sandri_92 ANSYS Meshing & Geometry 14 November 14, 2018 07:54
Problem with Solver when using Star CCM+ tutuabc STAR-CCM+ 0 April 15, 2010 10:23
[Other] StarToFoam error Kart OpenFOAM Meshing & Mesh Conversion 1 February 4, 2010 04:38
Poisson solver - orthogonal grid Fuka Main CFD Forum 0 May 11, 2006 11:19
solver for Poisson eqn billboard Main CFD Forum 3 May 22, 2002 00:07


All times are GMT -4. The time now is 10:40.