Hydrodynamics and Heat Transfer Analysis of Airflow in a Sinusoidally Curved Channel

Abstract

For heat transfer enhancement in heat exchangers, different types of channels are often tested. The performance of heat exchangers can be made better by considering geometry composed of sinusoidally curved walls. This research studies the modeling and simulation of airflow through a 2π units long sinusoidally curved wavy channel. For the purpose, two-dimensional Navier Stokes equations along with heat equations are under consideration. To simulate the fluid flow problem, the finite element-based software COM-SOL Multiphysics 5.4 is used. The parametric study for Reynolds number from Re = 100 to Re = 1000 and the period of vibration P from 0 to 5 are observed. The surface plots, streamline patterns, contours, and graphs are presented for the velocity field magnitude, temperature, and pressure against the Reynolds number as well as period of vibration. The results are compared with various literature. It is found that due to the creation of periodic contraction regions the velocity magnitude of the flow is continuously increasing with the increase of Reynolds number, on the contrary the pressure is decreasing from inlet to outlet of the channel. Also, a periodic variation in the pressure distribution along the vibrating boundaries has been found with an average increase of 500% for the high Reynolds number. A novel work was done by expressing the rotation rate per second in terms of local Reynolds number for the recirculating regions found due to the periodic oscillation of the boundaries. The average temperature near the outlet where a fixed temperature is imposed initially is decreasing with an increase in Reynolds number. The convection process is weakened due to an increase of periodic vibration of boundaries.

Magneto-Hydrodynamic Effects on Heat and Mass Transfer in Hybrid Nanofluid Flow over A Stretched Sheet with Cattaneo-Christov Model

“…A moving vertical porous plate was used in Sridevi et al, [12] investigation of the impact of thermal radiation and chemical reactions on MHD flow. The impact of fluid movements, Numerous scholars have explored and investigated the effects of chemical interactions, both Newtonian and non-Newtonian [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Using restrictions that are not isothermal and not iso-solutal.…”

Computational fluid dynamics-based investigation of the static and dynamic characteristic of hydrostatic bearing with nanolubricant: A theoretical method

“…In addition, the use of finite-element software packages allows a more intuitive analysis of properties such as temperature, velocity, and pressure fields of fluids with complex shaped. 18,19 Therefore, in this paper, the computational fluid dynamics (CFD) package Fluent is used to analyze the performance of hydrostatic bearings with nanolubricant and pure lubricant, respectively.…”