I know that the best way to learn LB is using Examples, But I have some problem in using OpenLB examples.
in tmp folder , there is a LOG file :
[center]Velocity in lattice units: u=0.02 Reynolds number: Re=200 Lattice resolution: N=50 Extent of the system: lx=2 Extent of the system: ly=1 Extent of the system: lz=0 Grid spacing deltaX: dx=0.02 Time step deltaT: dt=0.0004
1- I think dx= lx/N (2/50= .04) but in log file dx=0.02. N=50 is for X or Y? I think we must greater length in dt calculation.
I am confused !
Our computational domain is 50100 ? or 51101 (Zou B.C)?
2- dx is in SI system (dx = 2 cm)? or it is dimensionless?
I want to calculate Pressure drop, thus use saveAsciiData (that explained in OpenLB docs) to extract pressure data.
These values are physical or LB?
Should i use Delta_P = Delta_P [sub]LB[/sub] * dx[sup]2[/sup]/dt[sup]2[/sup] *Phro[sub]phys[/sub] ?
(thank you Timm for this!)
Thanks a lot