Fluid Flow Properties and Units

Typical SI units for the various fluid flow parameters are given in the table below.

Parameter	3DEC keyword	SI Units
Joint aperture at zero normal stress, \(u_{h0}\)	flowplane property aperture-initial	m
Joint maximum aperture, \(u_{max}\)	flowplane property aperture-maximum	m
Joint minimum (residual) aperture, \(u_{res}\)	flowplane property aperture-minimum	m
Fluid bulk modulus, \(K_w\)	block fluid property bulk	Pa
Fluid density, \(ρ_f\)	block fluid property density	kg/m3
Dynamic viscosity, \(μ\)	block fluid property viscosity	Pa · sec
Flow rate or discharge per unit width of joint \(q\)	flowplane edge apply discharge	m3/sec · m
Volumetric flow rate, \(Q\)	flowknot apply discharge	m3/sec
Fluid pressure, \(p\)	flowpknot apply pore-pressure	Pa
Joint hydraulic conductivity, \(k_H\)		m/s
Gas flow constant, \(γ\)	block fluid gas alpha
Gas flow constant, \(B\)	block fluid gas constant	s2/m2
Proppant volumetric concentration, \(c\)	flowplane vertex initialize proppant-volume
Proppant grain diameter	block fluid proppant grain-size	m
Proppant density, \(ρ_d\)	block fluid proppant density	kg/m3
Proppant pack intrinsic permeability	block fluid proppant permeability	M3
Matrix mobility coefficient, \(k\)	block zone fluid property permeability	m2/(Pa/s)
Matrix porosity, \(n\)	block zone fluid property porosity