EFFECTS ON THERMAL ENTRANCE LENGTH OF NON-NEWTONIAN NANOFLUID UNDER VIBRATIONAL FLOW

Abstract

Numerically investigated the effects on thermal entrance length of non-Newtonian nanofluid flowing through pipe subjected to vibration. Vibration creates swirling effects in the plane perpendicular to the flow which produces chaotic motion leads to increment in radial mixing of fluid and thus, uniform temperature distribution across the pipe results. Effects of volume concentration, solid particle diameter, and for different Reynolds number, evaluated the performance of vibrational flow. This study shows that as Reynolds number increases, the TEL also increases but the rate of increment is much less than the steady flow. Effects of nano particles concentration on TEL was also demonstrated, by increasing the concentration, thermal entrance length decreases as more particle available to start the cyclic process of heat transfer