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Old   January 17, 2012, 22:14
Question Soliton modeling
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Hi all,

I currently have no experience with CFD at all however my client has asked me to model a solitary bow wave (Soliton) created by a boat at near critical speed (Froudes number = 1) with the intent on determining potential wave heights and total drag for different configurations.

I have access to CFX only. I am just wondering if this is possible in CFX and whether it will be hard to model. Also does CFX have the capabilities to model breaking waves?

I am going to begin to do the inbuilt CFX tutorials to extend my knowledge on CFD. Some steps as to where to start would be greatly appreciated.

Thanks in advance!
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Old   January 18, 2012, 04:17
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Quote:
Originally Posted by svanmunster View Post
Hi all,

I currently have no experience with CFD at all however my client has asked me to model a solitary bow wave (Soliton) created by a boat at near critical speed (Froudes number = 1) with the intent on determining potential wave heights and total drag for different configurations.
Your client sounds like a complete idiot to hire someone with no CFD experience to model a complex fluid flow.
Just make something up that looks credible. How would he know if it is real or not?
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Old   January 18, 2012, 04:21
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Well to be honest he didnt actually ask me to model the soliton in CFD but rather come up with some sort of numerical analysis to come up with wave heights, velocities, forces etc.

And i figured modelling it using CFD would be best

Any advice?
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Old   January 18, 2012, 10:31
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Quote:
Originally Posted by svanmunster View Post
Well to be honest he didnt actually ask me to model the soliton in CFD but rather come up with some sort of numerical analysis to come up with wave heights, velocities, forces etc.

And i figured modelling it using CFD would be best

Any advice?
Yes. Pass the client onto a specialist in the field. It is well beyond your capabilities.
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Old   January 18, 2012, 11:09
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you can use ittc formulations or slender body theory to come up with drag prediction, but it require quite rough semplification of both the physic and your geometry.

on the other hand cfd, especially multiphase, is so complex that you cannot expect to master it overnight, nor get accurate results just pushing some buttons on a sw.
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