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We investigate the problem of structures formation in accretion disc zone,resulting from the tidally interaction in close binary star system. We aim toexamine the area where the incoming flow meets the matter around secondary starand the resulting effects throughout the accretion disc. The research is basedon employment of the fluid dynamics equations in conjunction with numericalsimulations leading to the design of graphical models of accretion processes.For the simulation we propose box-framed sharing schemes. (i) The tidaltransfer of matter through the inner Lagrangian point in close binary starsdisturbs the flow in disc's zones and outer disc area. Calculations on theperturbed parameters of density and velocity reveal formation of a thickenedzone in the contact area of interacted flows. It appears to be stable for anumber of periods and is unaffected by rotation and dissipation processes. (ii)The results also show development of undulations, which grow to vorticalpatterns in the accretion disc's zone. It is confirmed that under the influenceof tidal wave the conditions of reconfiguring of accretion flow structure aregenerated.

Density distribution configuration and development of vortical patterns in accreting close binary star system