Stability of mixed-convection boundary-layer flow on a porous wedge

Abstract

A theoretical analysis is presented of the stability characteristics of laminar forced–free mixed-convection boundary-layer flow past an isothermal wedge with uniform suction or injection. The nonsimilar boundary-layer equations for the basic steady flow are solved numerically with a difference-differential scheme in combination with an iterative method for solving the resulting ordinary differential equations. The disturbance equations are then solved numerically on the basis of linear stability theory. The neutral stability curves and the disturbance amplitude of the velocity component and of the temperature are presented graphically for values of the buoyancy parameter ζ, the pressure-gradient parameter m, and the suction/injection parameter X. The results indicate the important role of the suction/injection parameter on the characteristics of both basic flow and disturbance flow. PACS No.: 47.20.–k