TY  - EJOU
AU  - Amir, Fithry Mohd 
AU  - Yusoff, Mohd Zamri 
AU  - Hassan, Saiful Hasmady Abu 

TI  - CHARACTERISTICS AND THERMAL PERFORMANCE OF NANOFLUID  FILM OVER HORIZONTAL MULTI-FACETED CYLINDER
T2  - Frontiers in Heat and Mass Transfer

PY  - 2022
VL  - 18
IS  - 1
SN  - 2151-8629

AB  - 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<sub>BT</sub> developed along the film thickness in phases, in which the dominant phase, the steady-state N<sub>BT</sub> phase, can be used as 
the average N<sub>BT</sub>. 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.
KW  - <i>Falling film on tube; nanofluid film
KW  -  Alumina
KW  -  Titania
KW  -  heat transfer coefficient; multi-shape
KW  -  non-circular cylinder
KW  -  multi-geometry
KW  -  volume  of fluid
KW  -  horizontal tube
KW  -  wall shear stress.</i>

DO  - 10.5098/hmt.18.27