rayleigh benard convection for a square cavity

vnarayana · February 25, 2016, 04:36

Good morning all,
i am a mathematics research scholar , i need some results in rayleigh benard convection for a square cavity or 3d cavity just for comparison. the fluid consideration is air or water.
for air i tried the following transport properties
// Laminar kinematic viscosity
nu nu [0 2 -1 0 0 0 0] 1.000000e-03;

// Thermal expansion coefficient
beta beta [0 0 0 -1 0 0 0] 1.019368e-03;

// Reference temperature
TRef TRef [0 0 0 1 0 0 0] 290;

// Laminar Prandtl number
Pr Pr [0 0 0 0 0 0 0] 0.7; //1.0000e+01;

// Turbulent Prandtl number
Prt Prt [0 0 0 0 0 0 0] 0.9;
delta T=1
but i could not get steady state.
Can anyone help me to get steady state ?

NewKid · April 6, 2016, 23:45

Hi, your case is done? And I wonder which solver in OpenFoam is used for this convection simulation?

vnarayana · April 7, 2016, 04:08

I am doing simulation for Natural convection using buoyantBoussinesqSimpleFoam and i got some results, please tell me how to plot Residual plots, pyFoamPlotRunner.py is not working ? can we use paraview to see Residual plots ? to find Nusselt number please tell me how to find derivative with respect to x and y in paraview ?

NewKid · April 9, 2016, 04:47

Would you mind to show your results if it does not bother you? And you want to show Residual or Nusselt plots?

NewKid · April 9, 2016, 04:48

Would you mind to show your results if it does not bother you? And you want to plot Residual or Nusselt plots?

February 25, 2016, 04:36	rayleigh benard convection for a square cavity	#1
vnarayana New Member narayana vekamulla Join Date: Oct 2015 Posts: 15 Rep Power: 12	Good morning all, i am a mathematics research scholar , i need some results in rayleigh benard convection for a square cavity or 3d cavity just for comparison. the fluid consideration is air or water. for air i tried the following transport properties // Laminar kinematic viscosity nu nu [0 2 -1 0 0 0 0] 1.000000e-03; // Thermal expansion coefficient beta beta [0 0 0 -1 0 0 0] 1.019368e-03; // Reference temperature TRef TRef [0 0 0 1 0 0 0] 290; // Laminar Prandtl number Pr Pr [0 0 0 0 0 0 0] 0.7; //1.0000e+01; // Turbulent Prandtl number Prt Prt [0 0 0 0 0 0 0] 0.9; delta T=1 but i could not get steady state. Can anyone help me to get steady state ?

April 6, 2016, 23:45	Your case is done?	#2
NewKid Senior Member LT Join Date: Dec 2010 Posts: 104 Rep Power: 17	Hi, your case is done? And I wonder which solver in OpenFoam is used for this convection simulation?

April 7, 2016, 04:08	Rayleigh benard convection	#3
vnarayana New Member narayana vekamulla Join Date: Oct 2015 Posts: 15 Rep Power: 12	I am doing simulation for Natural convection using buoyantBoussinesqSimpleFoam and i got some results, please tell me how to plot Residual plots, pyFoamPlotRunner.py is not working ? can we use paraview to see Residual plots ? to find Nusselt number please tell me how to find derivative with respect to x and y in paraview ?

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April 9, 2016, 04:47		#4
NewKid Senior Member LT Join Date: Dec 2010 Posts: 104 Rep Power: 17	Would you mind to show your results if it does not bother you? And you want to show Residual or Nusselt plots?

April 9, 2016, 04:48		#5
NewKid Senior Member LT Join Date: Dec 2010 Posts: 104 Rep Power: 17	Would you mind to show your results if it does not bother you? And you want to plot Residual or Nusselt plots?