ABSTRACT
In this chapter, the heat transfer coefficient and pressure drop characteristics of Al2O3-water nanofluid inside the longitudinal fin tube are numerically examined by ANSYS FLUENT. In this work, two types of longitudinal fin shape have been taken: one is rectangular shape, and the other is trapezoidal shape. Studies have been carried out at different solid volume fractions of nanofluid ranging from 0% to 3%, with Reynolds number varying from 10,000 to 20,000. The effect of fin, the Reynolds number, and the solid volume fraction of nanofluid on the heat transfer coefficient is discussed. The geometry of the tube with longitudinal fin and its meshing are created in ANSYS WORKBENCH and ANSYS Mesh package, respectively. The SIMPLE approach is used with pressure velocity coupling. Its results showed that the heat transfer coefficient and pressure drop increase with an increase of the solid volume fraction and Reynolds number. Moreover, the results obtained from the smooth straight tube are compared with that of the longitudinal fin tube. A higher heat transfer coefficient is observed in the longitudinal fin tube than in the smooth straight tube.
