Effect of uniform suction on the laminar flow over a flat plate in a nonuniform approaching flow أثر الامتصاص السطحي على السريان في الطبقة الجدارية فوق سطح مستو في مجال سريان غير منتظم

Abstract

Solution for the twodimensional boundarylayer equations of a flat plate in a nonuniform incompressible flow with uniform boundary layer suction were obtained using a momentum integral technique Numerical results were obtained for both linear and parabolic shear flows It was found that the decrease in momentum thickness and increase in wall shear stress due to suction in the case of approach flow with positive shear is larger than the corresponding changes in the case of uniform approach flow The opposite is true in the case of approach flow with negative shear Similarly the effect of suction increases in the case of approach flow with positive shear derivative as compared to the corresponding effect in the case of uniform approach flow The opposite is true for approach flow with negative shear derivative

يستخدم هذا البحث طريقة "تكامل كمية الحركة" لدراسة أثر الامتصاص السطحي على السريان في الطبقة الجدارية فوق لوح مستوي في مجال سريان حر غير منتظم وقد تم الحصول على نتائج عددية حالتي السريان الخطي والسريان على هيئة قطع مكافئ وتمت مقارنتها بحالة السريان المنتظم