Regarding LBM and physics unit

[Biwaseo]

I am new to LBM software.
I implemented steady_state_relperm of MPLBM-UT several times with my custom geometries.

I want to figure out how to change the LBM unit to physics unit, but I could not find any clue about the unit conversion.
For example, the geometry size (L) and permeability unit (L^2).

The geometry size and other parameters were set as below.

geometry:
file name: "test_fib_0.60.raw" # Name of the input geometry file
data type: uint8
geometry size:
Nx: 200
Ny: 200
Nz: 200

domain:
geom name: "test_fib_0.60" # Name of .dat file, rename from original if you'd like. Do not include the file extension.
domain size:
nx: 150
ny: 100
nz: 100
...

Fluid densities

rho_f1: 2
rho_f2: 2

For constant forces boundary condition

force_f1: 1e-4
force_f2: 1e-4
....
fluid data:
Gc: 0.9
omega_f1: 1
omega_f2: 1
# Wetting forces from Huang et al. 2007
G_ads_f1_s1: -0.4
G_ads_f1_s2: 0
G_ads_f1_s3: 0
G_ads_f1_s4: 0

Sorry for such a basic question.
Thank you in advance.