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Turbulence and boundary layers

Question asked by Bob Fratantonio on Dec 3, 2008
Latest reply on Dec 19, 2008 by Bill McEachern
Hey guys,
I am a new user of Floworks and I am trying to model the turbulence of a fairing on the hull of a ferry. The ferry runs at about 10 m/s (~20 knots) and generates a thick turbulent boundary layer on the face of the fairing. In my analysis so far I have not seen the presence of turbulent eddies that I expect, nor do I see a boundary layer on the fairing or the hull.

For the initial conditions I specify a constant -10 m/s flow. The initial mesh is very fine (I suspect a boundary layer thickness of about 1 inch assuming Re ~10^7). For turbulence parameters I choose turbulent only but I understand that the turbulent energy and dissipation differ in every problem, so I don't really have numbers to insert there.

My latest attempt includes specifying a boundary condition on the hull and using the flow inlet parameter to specify a 1 inch boundary layer thickness and 0 flow at the boundary. Viewing the results afterwards still shows a constant velocity profile of -10m/s and no turbulent eddies. I worry that I am setting the problem up wrong.

Can anyone please help?

Thanks much,
Bob Fratantonio

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