[Shabirmean]

Hi,

I am new to CFD and I am hoping to use OpenFOAM for my research.

I am trying to solve for the height fields of waves in shallow waters.

I am trying to do it using the shallowWaterFoam solver. Can someone explain to me what the example given for this in OpenFOAM does???

When I run it and check the magnitude of U in paraview, I see there a initial trigger at the inlet and then after the simulation period the entire mesh has a uniform constant velocity....

What is happening? what does initial conditions and boundary conditions mean?

Is it an example to show how the height fields change over the running time when a small trigger is placed at the inlet when the simulation starts??

Please help...

[Shabirmean]

Any replies on this???

Originally Posted by Shabirmean

Hi,

I am new to CFD and I am hoping to use OpenFOAM for my research.

I am trying to solve for the height fields of waves in shallow waters.

I am trying to do it using the shallowWaterFoam solver. Can someone explain to me what the example given for this in OpenFOAM does???

When I run it and check the magnitude of U in paraview, I see there a initial trigger at the inlet and then after the simulation period the entire mesh has a uniform constant velocity....

What is happening? what does initial conditions and boundary conditions mean?

Is it an example to show how the height fields change over the running time when a small trigger is placed at the inlet when the simulation starts??

Please help...

[wyldckat]

Quick answer:

• http://openfoamwiki.net/index.php/FA...iphase_results -> http://openfoamwiki.net/index.php/Ho...iphase_results
• http://www.cfd-online.com/Forums/par...-analysis.html
• OpenFOAM: Interesting cases of bad meshes and bad initial conditions

[ngj]

Furthermore, the shallow water equations can be considered as the lowest order Boussinesq approximation, which means that you will have extremely poor dispersive properties, unless all waves are very long compared to the water depth.

Therefore, shallowWaterFoam does not sound like a suitable tool for the modelling of the propagation of waves in a depth integrated model formulation. There is, however, to my knowledge not any higher order Boussinesq implementation available for OpenFoam at the present state.

Kind regards,

Niels