A two-dimensional hydrodynamic model of liquid flow in the tank for ribbon
impellers operating in a laminar regime is proposed. It is assumed that the
re is no velocity distribution in the tank in the peripheral direction. The
impeller region is treated as a special region where relationships between
the impeller ribbon and liquid are taken into account. As a result of comp
uter simulations. a numerical solution of the system of motion equations an
d continuity equations was obtained. The model solution can be used to calc
ulate the distribution of three velocity components in the tank, power dema
nd, axial forces and primary and secondary circulation in the tank. Periphe
ral and axial velocity distributions, power demand and axial forces acting
upon the impeller ribbon were also determined in the study. They revealed s
atisfactory agreement with theoretical values.