Open Access

ARTICLE

CHARACTERISTICS AND THERMAL PERFORMANCE OF NANOFLUID FILM OVER HORIZONTAL MULTI-FACETED CYLINDER

by

College of Engineering, Universiti Tenaga Nasional (UNITEN), Jalan IKRAM-UNITEN,43000, Kajang, Selangor, Malaysia
* Corresponding author. Email: fithrya@yahoo.com

Frontiers in Heat and Mass Transfer 2022, 18, 1-15. https://doi.org/10.5098/hmt.18.27

Abstract

Nanofluid film on a horizontal tube is investigated numerically on the circular and multi-faceted cylinder. The fluid flow characteristics, including film thickness, shear stress, and thermal performance, are observed and analyzed. Fluid film on the circular surface is typical in many engineering applications, but the study of nanofluid film on non-circular surface is deficient in literature. The study provides a numerical model of a multi-faceted cylinder to simulate the nanofluid film on the non-circular surfaces using a volume of fluid (VOF) method. The ratio of Brownian motion to thermophoretic diffusion, N_BT developed along the film thickness in phases, in which the dominant phase, the steady-state N_BT phase, can be used as the average N_BT. Although, in general, the heat transfer performance of Alumina and Titania is better than water, producing higher HTC and Nu on both cylinders, Water, however, displays significant improvement relative to the base thermal performance of water fluid film on the circular cylinder.

---

Keywords

---