A computational model comprised of two particles connected with aid of a liquid interlayer served as a basis for investigation in capillary pressure value in the liquid and in basic parameters of particles influencing this value. Both water absorbed from the environment, and liquid components of dispersive compositions can form this interlayer. Interaction between variously shaped and sized particles was investigated. The offered computational model assisted with numerical methods can be used to explore how capillary pressure and parameters of both dispersive and liquid components influence values of capillary adhesion force between particles in powder-like compositions.