Net water flow under the influence of pressure

AvKv volume flow per unit area and time (cmycmys) the hydrauhe water eonductivity (cni /dyne/s) the differenee in the chemical potential for water the partial molar volume of water (mol/cm ) osmotic coefficient mole fraction of water gas constant absolute temperature 

It is assumed that the concentration of the solute in the membrane is related to the concentration of the solute in the bulk phase by the partition coefficient y and it is further assumed that y is the same for both sides of the membrane. The filtration permeability coefficient, P[, in cm/s can be calculated from the experimentally determined and the difference in the concentration of the impermeable solute in the two compartments. 

Where Z) and are the diffusion coefficient (cm s) and viscosity (poise) of water in these channels. 

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