XANSYS Message: 93049 [Go back to message list]
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Subject: Re: Ansys FSI nightmare
Author: Y Y Tan
Date: 2008-04-26 19:22:15Hi guys,
Thanks for everyone's support. It looks like i'm really going nowhere with this.
Anyway to think about it from a wider perspective, my objective of this test
was to check and see if Ansys could model this problem and right now, I'm
confused as to either my approach is wrong or its just that Ansys is not made
for this. So it would be very helpful if some of you could help me answer a few
questions:
1) How do we actually know if the problem is with the code or the problem is
with the modelling technique? If say I have an experimental result to compare
my simulation with and say my simulation converges, and the results do not
match, is this because of the code or because my approach is flawed?
2) Say I wanted to write a report which states that the program could not
simulate the problem, how do I actually do it, because if like you were doing
experiments, you'll definately get results to comment about but for the case
for a numerical simulation, what kinda things do you show in the results for
such cases since the model cant converge. Show pictures where the mesh becomes
distorted? Show pictures of the residual history?
Peter, I have this feeling too that it might be a dynamic problem but the author
of the literiture mention that with those b.c's oscillations would not occur.
Martin, thanks for offering your assistance, greatly appreciate it but I can't
figure out how this could be done without sending the wrong message to my
supervisor.
Christopher, I am testing my results against a published literiture, I wouldn't
really know how to fake it. I just cant think clearly now what I need to do.
C. Basciano, wow..I don't really understand how to employ this approach. I can't
just apply displacements on the solid nodes and let it drive the fluid flow
because the structure's response is highly dependent on the fluid flow. Anyway
I might have misintepreted what you meant but I guess I wont have time for this
now because i'm sure once I switch to this method, it'll encounter its own
problems as well.
Thank you for everyone's support. I need to get back to work now. Hopefully
tonight things would change for the better.
Kind regards,
Tan Yi Yong
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