Averaged equation of liquid flow in a porous body consisting of rod bundles

An attempt has been made to use a model of a porous body to investigate the hydrodynamic properties and heat exchange in the rod systems (cores of reagents, interpipe space of heat exchangers). The problem of a stationary flow of a viscous fluid in the lattice made of flat thin laminae is discussed. The equations are obtained by the way of geometrical averaging the Navier-Stokes equations. The solution obtained is extended to cover the general case of a three-dimensional flow in the regular rod lattices. The volumetric resistance forces, viscous interaction forces and inertia forces are analyzed. To solve the system obtained, one should know the empiric resistance factors in case of lateral and transverse flowing around the rod lattices, the average viscosity for a given volume with due regard for the turbulent component and the momentum factors