Simultaneous heat and mass transfer in unsteady free convection from two-dimensional and axisymmetric bodies

摘要: The unsteady laminar free convection boundary layer flows around two-dimensional and axisymmetric bodies placed in an ambient fluid of infinite extent have been studied when the flow is driven by thermal buoyancy forces from species diffusion. unsteadiness field caused both temperature concentration at wall which vary arbitrarily with time. coupled nonlinear partial differential equations three independent variables governing solved numerically using implicit finite-difference scheme combination quasilinearization technique. Computations performed for a circular cylinder sphere. skin friction, heat transfer mass are strongly dependent on variation Also friction increase or decrease as diffusion assist oppose, respectively, force, whereas rate higher small values ratio parameters than large values. local rates maximum stagnation point they progressively angular position point.