Przepływ cieczy lepkiej w szczelinie między powierzchniami obrotowymi: nieruchomą i drgającą skrętnie

Laminar flow of an incompressible viscous fluid is considered in a slot between two parallel surfaces of revolution having vertical axis of symmetry: the upper one is fixed and the lower one – torsionally oscillating. The linearized equations of motion of the viscous fluid flow for axial symmetry are written in the intrinsic curvilinear orthogonal coordinate system linked with the lower surface. As a result, the formulae defining the velocity components and pressure have been obtained.