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How to generate a wave in Fluent?
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Hello
I want to generate a wave in Fluent.anybody knows how i should do this? i have heard this should be done with UDF writing.is this right? thanks |
Hello stranger,
Yes you should use UDF function, means write your own routine. Depends what kind of wave you need to generate. There is one of the tutorials online, I believe it is in student section... Let me check it online... OK. I found one of the links, here it is, direct link to the PDF with tutorial. http://willem.engen.nl/uni/fluent/do...ernal/wave.pdf Hope it helps. If you have some more questions shoot, I'll try to help. PS. What is a little bit strange, if you test the same routine in pure C, you will get ALMOST the same paddle displacement numerical values as those from Fluent C routine, but slightly, by a tiny bit off from the ones from original C... like 0.00001. Overall displacement plots overlap. |
generate wave
hi
this is a late answer but you can find it in this link: http://www.fluent.com/software/sf_me...orial_wave.htm and search (fluent tutorial generate wave in tank) you can find a pdf file that explain how you can solve your problem. best regards, elahe |
It's not necessary to define moving wall using UDF. Why???!!! Aren't you afraid of possible problems with your grid?!
Just define velocity components: horizontal and vertical - and water free level using UDF. I think it's simpler. If you need I can send you my UDF file. Also, don't forget about wave reflection from outlet boundary because of using pressure-outlet boundary conditions. |
Hi WSWGg,
thank you for your attention, do you mean i should patch water level in the first and introduce a periodic horizental velocity to fluent? do i undrestant right? if not please explain it for me a little more, can i get your udf file,too? my email address : ekakavand@yahoo.com all the best, elahe |
Of course, you should patch water level in the first!
Ok, I'll do this, I'll send you my UDF, but after January 1st, ok? I've got a little problems at the moment. |
Thank you so much WSWGg,
I await to receive your file. all the best, elahe |
Hi,
i am also try to simulate wave by introducing velocity inlet (linear theory) and its work fine with me. now i want to simulate (wave carry with mean current) but in this case i don't know how to set the boundary conditions. any help would be highly appreciate |
Hi WSWGg,
Can you please send the UDF to me also. i want to define the velocity at the inlet using a UDF. my email: call_madhu@yahoo.com thanks in advance |
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hi WSWGg i hope to be solved your problem, could you please send me your udf or fluent file that you said about it. all the best elahe |
Arampath and Ekakavand, check your e-mails, I've just sent my UDF file, like had promised.
Novice, excuse me, but I don't understand you post. You simulated wave using linear wave theory making boundary conditions on velocity components on enter border, am I right? So, what's the problem? |
Hi
can anyone help me to write a UDF for the creation of a sinusoidal wave at the end of a model square tank(model basin)(2-D)? thanks. |
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can you send me your email? my email is here... you can see it. best elahe |
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hello paka i have used udf(DEFINE-CG) for writing udf in the tutorial wave generation in a tank,but i dont know what to write vel?i dont know how to define vel for this waves?. thanks for your advance. |
Wave and breakwaters
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i am trying to simulate the turbulent waves and scouring in front of breakwaters... the wave simulation works fine with the laminar flow option but when i switch to turbulent flow (k-e or k-o) the solution always diverges and i get no wave profile... any help with that will be appriciated. and WSWG if i could get your UDF also it'd do me great help as i am new to UDFs. my email is gsoydinc@parkinsaat.com Thnx. gok |
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I am trying to model waves on water surface inside a pipe flowing with air and water. I have already simulated the stratified flow, but do not know how to generate a wave using a UDF coz I have no prior experience in writing a UDF. I want to generate a wave and then observe it with different phase velocities. Can you please send me your UDF so that I can learn from it. Thanks, Pranab |
There are many Thesis online wich have UDFs regarding wave profiles.
With just a quick search: http://theses.library.uwa.edu.au/adt...ic/02whole.pdf The wave theory chosen for the UDF of thesis above is Stokes 2nd Order. If you want another one like Linear just change the equations |
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Thanks for your reply. Will try your suggestion. |
can u send me the udf file please (nevertheless i am using CFX) but just for interest of introducing some perturbation into my stratified flows
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Hi WSWGg,
Can you send me your UDFs file? By the way, how can I plot wave elevation coresponding to time in FLuent S/W? Thanks for your help. Best regard |
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