DEVELOPING PULSATING SMALL-AMPLITUDE LAMINAR FLOW IN A RECTANGULAR CHANNEL

The method of numerical simulation of the hydrodynamics of a developing steady-state pulsating small-amplitude laminar flow of an incompressible Newtonian liquid in a rectangular microchannel is presented based on the boundary-layer theory. The simulation was carried out for flow with Re = 100-2000. Distributions of the coefficients of hydraulic resistance and of skin friction of flow along the channel length are obtained. Conclusions are drawn on the length of the initial hydrodynamic segment and on the changes in the amplitude and phase of vibrations of the hydraulic resistance and skin friction coefficients and of longitudinal velocity. The distribution of the shear stress, as well as of its amplitude and phase over the channel perimeter, has been determined.