A droplet train model proposed by Foulser et al. (Transport in Porous
Media 6 (1991), 223) is modified with addition of capillary resistance
. It is shown that linear transport equations for this model can be re
presented in the Onsager form, where the generalized thermodynamic for
ces are pressure gradients of corresponding phases. In particular, the
onset of capillary interactions give rise to the nonzero and equal cr
oss term coefficients.