parameter in slip flow expression for K (sec2-m/kg)

shape factor, known as Kozeny constant diameter (m)

particle diameter (m)

acceleration due to gravity (m/sec2)

hydraulic head (m)

intrinsic permeability (k2)

hydraulic conductivity (m/sec)

characteristic macroscopic length (m)

number of pore layers pressure (kg/sec2-m)

q = seepage velocity (m/sec)

Q = volumetric flowrate (m /sec)

Qm = volumetric flowrate at average pressure pm (m3/sec)

r = radius

Re = Reynolds number

S = specific surface (m2)

z = coordinate (in direction of gravity) (m)

Greek Symbol fi = viscosity (kg/m-sec)

t = tortuosity

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