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

fsi

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 3, 2007, 14:45
Default fsi
  #1
ALFIN
Guest
 
Posts: n/a
hi

i heard about star CD recently and i would like to know whether can i model FLUID structure interation and to find the stress and deflection of the structure using this software along with the fluid properties

thanks

ALFIN
  Reply With Quote

Old   July 4, 2007, 00:14
Default Re: fsi
  #2
Mike
Guest
 
Posts: n/a
hi...you should be able to do this with ES-FSI.
  Reply With Quote

Old   July 4, 2007, 05:45
Default Re: fsi
  #3
Peter
Guest
 
Posts: n/a
Alfin,

Star has an interface with Abaqus for example. For high end / difficult applications like this start by calling CD-adapco.

On the subject of es-tools. Only es.ice is worth paying a license fee for. This last I knew about es.fsi was about six months ago. es.fsi is a collection of subroutines, no GUI, that you have to hack and play with before compiling for each job. This position may have changed, but adapco wants to see a return on investment before it spends more money on the this or any other tool.

Also es.fsi has limited functionality. It reads the super element format of the FEA stiffness matrix. It works for simple small displacement linear problems, but not much else. This is very clear when you see the es.fsi presentation that all CD and / or adapco salesmen have.

Another issue with es.fsi is that because of its unfinished nature, it is difficult to use, therefore it is sold only after a consultancy project first. so you give your first job to adapco at $5K per week minimum, then you pay for training, then you pay for the license, then you ... With es.fsi you are going to need deep pockets and long arms for this project.

Yes, Star can handle FSI problems, and handle them in various ways. It actually gives good results as well. Just call both the FEA and CFD vendors to get a balanced picture first.

Regards

  Reply With Quote

Old   July 4, 2007, 07:20
Default Re: fsi
  #4
Dave
Guest
 
Posts: n/a
Hi Alfin,

The good news is that yes, you can do FSI with STAR-CD. The bad news is that nobody (including all other CAE vendors) has come up with a "one-size-fits-all" solution for FSI; depending on your case you may be able to do it all in STAR, or need to couple to an FEA code (like abaqus), couple with a 6DOF solver, etc. There's a good article that outlines the various methods, giving examples, here: http://www.cd-adapco.com/press_room/...tructures.html

  Reply With Quote

Old   July 7, 2007, 13:58
Default Re: fsi
  #5
Luca
Guest
 
Posts: n/a
Can you be more precise and give a little more detail of what you're going to do? I had no problem in setting up a FSI problem for aeroelasticity analysis of aircrafts inside FLUENT. Maybe I can help you a little and give you some suggestions. Luca
  Reply With Quote

Old   July 8, 2007, 07:05
Default Re: fsi
  #6
hayate
Guest
 
Posts: n/a
hello

the company i work for (defence sector) is trying since last summer to find the best solution for FSI , we try everything... star cd with abaqus , fluent with abaqus , star with nastran (neinastran) ... about 5 or 6 codes cupling. the only thing that i understand is 1) for real FSI on tanks and pipes only dytran can give you the best results 2) the compination of abaqus with fluent is a full disaster... and of course now abaqus is a part of dassault and fluent ansys so if someone buy this solution in the near future it will not works..... 3) the only code that really is worth is ansys cfx -ansys mechanical every other solution... just too risk to put money on it , if someone buy star with fluent is also too risk due to the seperate companies policy, star with abaqus...too expensive nearly 200 000 euros .... now we are going to test a software named smartcoupling from smartcae.it to see the star cd with neinastran... we will see about that...

best regards
  Reply With Quote

Old   July 8, 2007, 08:07
Default Re: fsi
  #7
Peter
Guest
 
Posts: n/a
Dear Hayate,

In the days when Fluent had an exclusive arrangement with Fluent, MSC was getting cosy with CD-adapco. For obvious reasons. Some projects were talked about and development work to make the codes talk to each other on a better level involved CD London. This was back in 2005.

Once Ansys bought out Fluent, the Fluent / Abaqus arrangement quickly went to out of fashion. Abaqus then chased CD-adapco for a working agreement. CD-adapco was happy to chased by all relevant and potential partners. It is clearly in the interest of CD-adapco to make non binding partnerships with as many FEA vendors as possible. I would expect Star-CD to talk to MSC products, Abaqus and Permas as a minimum. Permas because adapco is (or at least was) the US reseller of Permas.

Therefore linking Star to various FEA codes for FSI should be pretty much deliverable and therefore supportable in 2007.

What I cannot understand without further information is the €200K price. This is very high.

Regards
  Reply With Quote

Old   July 8, 2007, 10:58
Default Re: fsi
  #8
hayate
Guest
 
Posts: n/a
hello again

well i also believe that cd adapco should stay along and make agreements with as many fea vendos as they can because now they have the opportunity to take eveyone that do not want to use a standar company like ansys (mechanical and cfx/fluent) or abaqus with something else....

i know the people in italy that create the smartcoupling software for FSI http://www.smartcae.com/prod_com/30/ and as they told me their software is working with several codes .

unfortunatelly i never wor with pernas so i have no idea about that software , is it realy good? worth to see that?

about the price of the fluent abaqus .... my friend ... 100 000 euros for abaqus and 85 000 eyros for fluent...

best regards hayate

  Reply With Quote

Reply

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



All times are GMT -4. The time now is 08:36.