CFD Online Logo CFD Online URL
Home > Forums > CFX

How to implement subroutine to modify domain type?

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

LinkBack Thread Tools Display Modes
Old   December 5, 2007, 00:17
Default How to implement subroutine to modify domain type?
Posts: n/a
Dear all,

Let me describe my intention:

1) I have 3 domains set up for a Transient simulation.

2) The first 10 seconds, the domains are Fluid-Solid-Fluid, so there will be no flow across since the Solid domain is blocking the channel.

3) In the next 10 seconds, the domains become Fluid-Fluid-Fluid, so the middle domain acts as an opening valve that enables flow through the domains.

4) In the beginning, the domains are connected using Fluid-Solid, and Solid-Fluid interfaces; but the interfaces will change into Fluid-Fluid connection after 10 seconds, and vice versa.

Procedures 2~4 shall be repeated multiple times.

My question is:

=> How to implement subroutine to modify domain and interface types while the solver is running to solve a transient problem?

Thank you, and hope to hear from you all soon.


  Reply With Quote

Old   December 5, 2007, 10:17
Default Re: How to implement subroutine to modify domain t
Posts: n/a
Dear Chin,

That is not possible, nor the recommended approach for this type of problem.

Perhaps, you could setup the problem as 3 fluid domains, create a very large momentum source in the mid-domain, and change that source as a function of time (CEL expressions).

This approach should work assuming your flow is not tangential to the domain interfaces because this approach does not account for the turbulent wall shear formulation.

Hope this helps, Opaque

  Reply With Quote

Old   December 5, 2007, 17:21
Default Re: How to implement subroutine to modify domain t
Posts: n/a
Thank you Opaque,

I think your idea brightened me a lot..

I will try out your method, and will also try to make the middle domain to be "porous medium", and change the porosity accordingly..

Many thanks again.. Cheers!
  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
Using starToFoam clo OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 33 September 26, 2012 04:04
Domain Imbalance HMR CFX 3 March 6, 2011 21:10
rhoSimpleFoam claco OpenFOAM 7 April 20, 2010 04:32
Flow Around a Cylinder ronaldo OpenFOAM 5 September 18, 2009 08:13
reconstructParMesh not working with an axisymetric case francesco OpenFOAM Bugs 4 May 8, 2009 05:49

All times are GMT -4. The time now is 02:32.