INFLUENCE OF CHEMICAL REACTION ON TRANSIENT MHD FREE CONVECTION OVER A MOVING VERTICAL PLATE

. دقف كلذكو زيكرتلا ةدايزو ةعرسلا ليلقت ىلإ يدؤت يسيطانغملا لاجملا لماعم ةدايز نأ دجو . The effect of magnetic field on the transient free convection flow of an electrically conducting fluid over an impulsively started isothermal vertical plate is numerically investigated, considering a homogeneous chemical reaction of first order. The transient, nonlinear and coupled governing equations are solved using an implicit finite-difference scheme of Crank-Nicolson type. The effects of various parameters on the transient velocity, temperature, and concentration profiles as well as heat and mass transfer rates are analyzed. The fundamental parameters of the problem are the chemical reaction parameter and the magnetic parameter. It is found that, the velocity as well as concentration decreases with increasing the chemical reaction parameter. While the velocity decreases and the concentration increases as the magnetic parameter increases.

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