Dear All.
I’m trying to get the dimensionless velocity for boussinesqThermal2d case. As i know, the u_{dl} should be indipendent on the dx/dt after i make the following conversion:
u_{dl} = u_{lu} * converter.getDeltaX()/converter.getDeltaT();
However, by changing the ratio dx/dt i get always different dimensionless velocities.
Follow the numerical test i did.
A)
Reynolds number: Re=31.6228
Raynleigh number: Ra=1000
Prandlt number: Pr=1
Lattice resolution: N=40
Extent of the system: lx=1
Extent of the system: ly=1
Extent of the system: lz=0
dx dt Umax u_{dl}
0.025 0.025 1. 0.000929873
0.025 0.0125 0.5 9.10072e-05
0.025 0.0025 0.1 3.79048e-07
0.025 0.00125 0.05 3.02016e-08
0.025 0.00025 0.01 6.1997e-11
0.025 0.000125 0.005 4.01658e-12
B)
Reynolds number: Re=10
Raynleigh number: Ra=100
Prandlt number: Pr=1
Lattice resolution: N=40
Extent of the system: lx=1
Extent of the system: ly=1
Extent of the system: lz=0
dx dt Umax u_{dl}
0.025 0.025 1. 0.000984419
0.025 0.0125 0.5 0.000105448
0.025 0.0025 0.1 6.19545e-07
0.025 0.00125 0.05 5.98946e-08
0.025 0.00025 0.01 1.70106e-10
0.025 0.000125 0.005 1.1771e-11
0.025 0.000025 0.001 2.06E-014
Let me know if someone may help me.
Thanks,
Stefano