Experimental Investigations of Steady Flow in a Tube With Circumferential Wall Cavity

The problem of an axisymmetrical laminar flow past a square cavity was treated experimentally. The cavity flow patterns obtained in flow visualization were of a special interest. Some geometrical features of dividing streamline like coordinates of separate and reattachment points as well as the coordinates of the vortex center were measured for a range of Re numbers and compared with the numerical results obtained by Stevenson. The detected flow patterns were also related to the global pressure-flow characteristic. Two zones of laminar flow characterized by the different nonlinear corrections to Darcy's law were distinguished