Abstract
The Kozeny-Carman equation was modified by considering the time dependency of contact angle between the capillary wall and the liquid surface in order to describe more precisely the infiltration rate of liquid into a porous body. The validity of the derived rate equation was proved in comparison with the experimentally measured rates of infiltration of water and some metal infiltrants into the sintered porous glass and metals respectively. The infiltration rate was not influenced considerably by the change of the contact angle during the infiltration, and the use of the average or constant value of contact angle was proper for the computation of the infiltration rate.
