CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Running, Solving & CFD

How to implement a cavitation model

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 20, 2006, 09:15
Default Hi again....well, I've alread
  #1
New Member
 
Alessio V
Join Date: Mar 2009
Posts: 7
Rep Power: 8
adamsview is on a distinguished road
Hi again....well, I've already opened a topic asking about something to solve fluxes with high gradients on pressure that generate cavitation inside of the fluid. No answers have came...so i guess it is not actually possible with OpenFOAM. I know it could be really difficult, but.... where to start to add (to simpleFoam solver) equations to solve cavitation cases? I'm not really an improved c++ programmer...so i need some help (on how OpenFOAM code is structured). Is there a guide more readable than Doxygen one?? Thank you again....
adamsview is offline   Reply With Quote

Old   April 20, 2006, 13:30
Default My experience with openFOAM is
  #2
New Member
 
Inanc Senocak
Join Date: Mar 2009
Location: Los Alamos, NM, USA
Posts: 4
Rep Power: 8
senocak is on a distinguished road
My experience with openFOAM is all about going through 1-2 tutorials. But I worked on cavitation modeling with pressure-based solvers (SIMPLE, PISO), that's why I think it should be doable in openFOAM too. However, implementing a cavitation model is much more involved than picking up a model and just putting it in your code. Once the cavitation model is there, your problem is no more incompressible. The cavitating region is compressible and the rest remains incompressible. So you have to address this change of characteristics in your pressure-based algorithm. One way of doing is to use an all-speed formulation of SIMPLE or PISO.

I have couple of articles explaining how to do this in both SIMPLE and PISO. Send me an email if you are interested in having them.
senocak is offline   Reply With Quote

Old   April 23, 2006, 06:40
Default Hi, search the forum for 'c
  #3
Senior Member
 
Markus Hartinger
Join Date: Mar 2009
Posts: 102
Rep Power: 8
hartinger is on a distinguished road
Hi,

search the forum for 'cavitation' and you will find a few threads discussing that.
I am using cavitatingFoam, which is a single fluid, barotropic approach and very stable implementation. The code hasn't been released yet. I suggest you write a mail to Henry Weller.

regards
Markus
hartinger is offline   Reply With Quote

Old   April 28, 2006, 19:17
Default Hi Alessio: I am publishin
  #4
Member
 
Join Date: Mar 2009
Posts: 43
Rep Power: 8
vatant is on a distinguished road
Hi Alessio:
I am publishing a paper on cavitation modeling using compressible flow calculation using Foam. So, it can be done. Actually, Foam's procedure can help capture transient effects very well. Dr.Senocak, have reviewed your papers based on volume fraction method using pressure based methods. My methods are based on compressible pressure correction technique as well, although its more eulerian.
vatant is offline   Reply With Quote

Old   April 28, 2006, 23:45
Default I haven't reviewed his papers.
  #5
New Member
 
Inanc Senocak
Join Date: Mar 2009
Location: Los Alamos, NM, USA
Posts: 4
Rep Power: 8
senocak is on a distinguished road
I haven't reviewed his papers. Why would you say that? I'd appreciate if you edit and delete that part from your post.

I apologize for posting this non-technical response.
senocak is offline   Reply With Quote

Old   April 29, 2006, 15:56
Default Dr.Senocak, I am sorry. I l
  #6
Member
 
Join Date: Mar 2009
Posts: 43
Rep Power: 8
vatant is on a distinguished road
Dr.Senocak,
I am sorry. I left out "I" before the reworked "rather than reviewed". Apologize,I wanted to say, I have worked on your papers and have used similar pressure correction techniques. Sorry for the miswording.

Vatant
vatant is offline   Reply With Quote

Old   August 17, 2007, 09:49
Default Hello Dr. Senocak, Have you
  #7
sek
Member
 
Sung-Eun Kim
Join Date: Mar 2009
Posts: 76
Rep Power: 8
sek is on a distinguished road
Hello Dr. Senocak,

Have you tried your cavitation model in OpenFOAM? I've been trying presure-density coupling similar to your approach. I was curious about whether solving pressure directly - instead of pressure-correction - would make it difficult to do proper pressure-density coupling. Comments?
sek is offline   Reply With Quote

Reply

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
implement of Spalart-Allmaras model K S Chang Main CFD Forum 1 August 21, 2010 16:59
Turbulence Model Modification and Implement qtian OpenFOAM Running, Solving & CFD 1 January 25, 2009 07:53
about the mixture model and cavitation model lius FLUENT 2 January 11, 2006 05:55
How to implement swirling phenomenon to model FAN OPticdesigner Main CFD Forum 3 January 9, 2006 08:16
FDS - how to implement your FORTRAN model???? ana Main CFD Forum 0 July 1, 2005 10:06


All times are GMT -4. The time now is 18:45.