• CRITICAL ANALYSIS OF ON THE FLOW RATE AND SKIN FRICTION OF AN INCOMPRESSIBLE FLUID OF SECOND ORDER TYPE WITH RESPECT TO THE FREQUENCY OF EXCITATION WHEN THE BOUNDARY IS SUBJECTED TO PERIODICAL DISTURBANCES

Abstract

The influence of various parameters on the flow rate and skin friction is examined in this paper, when the bounding surface is subjected to sinusoidal disturbances. It is noticed that, as the angle of inclination is increased, the flow rate decreases initially and thereafter the effect is found to be reverse. However, the phenomenon is found to be periodic as the frequency of excitation is increased. It is seen that, for a constant angle of inclination, skin friction is periodic in nature. Such a pattern is attributed due to the sinusoidal movement of the fluid bed. Further, when the frequency of excitation is held constant as the angle of inclination is increased, the skin friction increases. An interesting observation is that, in the absence of angle of inclination, and irrespective of frequency of excitation, the skin friction is found to be absent. It is seen that, increase the concentration of the fluid contributes to the decrease in the flow rate. However, the effect seems to remain same, even when the frequency of excitation is held constant and the fluid concentration is increased. Further, when the concentration of the fluid medium is held constant, and increase in the frequency of excitation   the skin friction  decreases. In general it is seen that, increase in the porosity of the bounding the flow rate  increases.  Also, when the frequency of excitation is held constant, increase in the fluid concentration increases the flow rate.