[waves2Foam] Looking for equations of turbulence model and very high pressures (p_rgh)

Nick_civ · March 13, 2014, 04:22

Hi Niels,

1) I am trying to find where the equations of your turbulence model (as described in your article) are. I have run several cases and I can see breaking wave or run up but you have set laminar in the turbulence properties file. I suppose that your turbulence model is included inside the code and I am trying to find where. Can you help me?
2) I get very high pressures (p_rgh) when I use snappyhexMesh and the p_rgh animation (Paraview) is like the alpha one. It must be mentioned that I have changed the sea level (it is not zero) because the stl file must have positive coordinates. You can try it with the test attached to my previous posts (#1 post here). Do you have any idea about that?

Thank you in advance.

Kind regards,
Nick

ngj · March 13, 2014, 12:08

Hi Nick,

Ad. 1.: The turbulence model is not part of waves2Foam. I do not have any immediate plans of releasing it.

Ad. 2.: The pressure does exactly as it is supposed to do. p_rgh is the pressure in excess of the hydrostatic component, which is 0 for z = 0 m, i.e. placing the sea level high means that the hydrostatic pressure is large and negative, why p_rgh has to be large and positive.

Kind regards,

Niels

March 13, 2014, 04:22	Looking for equations of turbulence model and very high pressures (p_rgh)	#1
Nick_civ New Member Nick Krgs Join Date: Jan 2014 Posts: 13 Rep Power: 12	Hi Niels, 1) I am trying to find where the equations of your turbulence model (as described in your article) are. I have run several cases and I can see breaking wave or run up but you have set laminar in the turbulence properties file. I suppose that your turbulence model is included inside the code and I am trying to find where. Can you help me? 2) I get very high pressures (p_rgh) when I use snappyhexMesh and the p_rgh animation (Paraview) is like the alpha one. It must be mentioned that I have changed the sea level (it is not zero) because the stl file must have positive coordinates. You can try it with the test attached to my previous posts (#1 post here). Do you have any idea about that? Thank you in advance. Kind regards, Nick Last edited by wyldckat; November 4, 2018 at 14:07. Reason: changed reference to post #720

March 13, 2014, 12:08		#2
ngj Senior Member Niels Gjoel Jacobsen Join Date: Mar 2009 Location: Copenhagen, Denmark Posts: 1,900 Rep Power: 37	Hi Nick, Ad. 1.: The turbulence model is not part of waves2Foam. I do not have any immediate plans of releasing it. Ad. 2.: The pressure does exactly as it is supposed to do. p_rgh is the pressure in excess of the hydrostatic component, which is 0 for z = 0 m, i.e. placing the sea level high means that the hydrostatic pressure is large and negative, why p_rgh has to be large and positive. Kind regards, Niels __________________ Please note that I do not use the Friend-feature, so do not be offended, if I do not accept a request.