A New Measurement Method of Liquid Transport Properties
Liquid transport properties, such as suction pressure, permeability and apparent moisture diffusivity, were measured for wide range of degree of liquid saturation within wet material to be dried. Wet sample was pressurized-by N2 gas and drained water through membrane filter was measured continuously by a micro processor system. Suction pressure was determined from the equilibrium data. Permeability and difusivity were estimated from the transient change of the drained water volume, by using a linearized transport equation in each small increment of pressure.
Obtained data of both permeability and apparent moisture diffusivity show a strong dependence of saturation.
Validity of the present method is confirmed by comparing with the previous steady state drying method.
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