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boat sink and trim

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Old   October 15, 2009, 09:25
Default boat sink and trim
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Hello everybody,

i am trying to simulate boat sink and trim...i'm not interested to define good results for the transient and i would like to know what's tipically the max number of inner iteration for such a case.
Iam using 5 iterations per time step...do you think it is sufficient to define correct sink and trim value??or may i risk not to converge?
Many thanks
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Old   October 18, 2009, 05:36
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Jaime Saelices
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I used to use a 5 or 10 iterations per timestep and solver always converge correctly. I think 5 is a good one in this case.

Do you how to create a control volume in star-ccm+?
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Old   October 18, 2009, 07:34
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Quote:
Originally Posted by jsaelices View Post
I used to use a 5 or 10 iterations per timestep and solver always converge correctly. I think 5 is a good one in this case.

Do you how to create a control volume in star-ccm+?
control volume has been created by the command : import>create block surface
I use half geometry for simmtrycal flow or whole model in such a case as manouvering where unsimmetrycal flow.
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Old   October 19, 2009, 10:03
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How do you substract from the block surface the geometry of the model. Because you have to do this in order to process symmetrical flows, haven`t you?
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Old   October 19, 2009, 12:32
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i generally build a block surface and i intersect it with my hullshape...than i will cut the block by edges from intersection
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