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Old   January 21, 2009, 16:22
Default Re: about boat simulation
  #21
hasim
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well

i believe that i can saw you more than 200 cases than cfd codes can not handle!!!!!!!! if you read the star cd forum you will understand the case of dfbi with turbolence wave, the people of star advertizing the dbfi but they do not tell the people that the code can not solve in turbolence!!!!!!!! so you can not take hydrodynamic forces.....

now what do you believe?

and i can tell you for sure many other cases

a friend here tell me that a code with general moving objects... that can solve with great accurancy... but the true is that it is a FDM software.... so the accurancy is not very good. if you create the examble with the gmo sheer in low 3d and put the double mesh size, the results are 200% different.....

so???? how can i be sure that the codes are working????

and i can tell you more than 200 exambles....
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Old   January 22, 2009, 07:31
Default Re: about boat simulation
  #22
Stefano
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hello hasim, I'm reading all the posts here in the Main Discussion forum and I see there are many different opinions. I regulary use FLOW-3D for nautical simulations and I can confirm you the accuracy spoke in FLOW-3D posts. Many considerations reported here on FLOW-3D mesh are on more wrong, and it will be interesting to discuss on it.

We also regulary do test-case simulations to the societies that would like to test FLOW-3D in their fields, so, what I can tell you, is to write me by email and if your society is interested in evaluating a cfd code for ship simulation we'll gladly do a test for you and for free on a your ship.

best regards
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Old   January 22, 2009, 17:39
Default Re: about boat simulation
  #23
hasim
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hello stefano

yes the real thing is that we have a big conversation on cfd and naval industry,

can you tell us for sure why do you believe that the code can run with accureatly? how did you test it and some case study?

also can you apply us your opinion about the FDM and accurancy? i have work with flow 3d but i never understand why the mesh is so bad!!!! many times i try to see that but i couldn't.... can you send me a pre file of a ship to test it? i have a company near me that has a x64 version 9.2 of flow 3d and we can see there the accurancy.

also what are the main advans and disadvan that flow 3d has vs to star and other codes?????

thanks a lot hasim
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