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ubaka July 7, 2011 02:53

Modelling Propagating 2d water waves
 
Hi, im currently modelling 2d water waves propagating alomg the surface of water. Im having an issue with the wave dampening out and experiencing dispersion effects after very few wave propagations. I am usin PISO scheme with 2nd oredr aapproach for momentum. Further to this i am specify the wave inout through a velocity inlet with specified wave amplitude, wave length and celerity based around deep and shallow water criteria.

Does anybody know what the flat and wavy initialisation conditions for the open channel bc does?? When i select wavy its gives me an initial condition of the propagating wave befor i have even run the simulation. Further to thi it just amplifies the waves until the fill the whole fluid volume i set.

Any help will be grateful im kind of at a standstill with it. Thanks in advance

Niru October 18, 2012 15:51

reg waves
 
Hey Hi

I would like to model waves using fluent or CFX. Can you tell me how modelled waves?
Is there any tutorial for that?

hilllike October 18, 2012 20:56

Quote:

Originally Posted by ubaka (Post 315061)

Does anybody know what the flat and wavy initialisation conditions for the open channel bc does?? When i select wavy its gives me an initial condition of the propagating wave befor i have even run the simulation. Further to thi it just amplifies the waves until the fill the whole fluid volume i set.

Any help will be grateful im kind of at a standstill with it. Thanks in advance

Normally, for wave generation, there are a dumping zone before the open boundary, which dissipate the outgoing wave and reflected wave. In that case, Neumann boundary condition can be used.
Other researchers use a non-reflected boundary condition for open boundary without a dumping zone.
It is not difficult to find some papers on this topic, hope that can help you.
ren


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