Investigation of Forced Convection Enhancement and Entropy Generation of Nanofluid Flow through a Corrugated Minichannel Filled with a Porous Media

Abstract

Corrugating channel wall is considered to be an efficient procedure for achieving improved heat transfer. Further enhancement can be obtained through the utilization of nanofluids and porous media with high thermal conductivity. This paper presents the effect of geometrical parameters for the determination of an appropriate configuration. Furthermore, the optimization of forced convective heat transfer and fluid/nanofluid flow through a sinusoidal wavy-channel inside a porous medium is performed through the optimization of entropy generation. The fluid flow in porous media is considered to be laminar and Darcy–Brinkman–Forchheimer model has been utilized. The obtained results were compared with the corresponding numerical data in order to ensure the accuracy and reliability of the numerical procedure. As a result, increasing the Darcy number leads to the increased portion of thermal entropy generation as well as the decreased portion of frictional entropy generation in all configurations. Moreover, configuration with wavelength of 10 mm, amplitude of 0.5 mm and phase shift of 60° was selected as an optimum geometry for further investigations on the addition of nanoparticles. Additionally, increasing trend of average Nusselt number and friction factor, besides the decreasing trend of performance evaluation criteria (PEC) index, were inferred by increasing the volume fraction of the nanofluid (Al2O3 and CuO).

Constructal Optimization of Rectangular Microchannel Heat Sink with Porous Medium for Entropy Generation Minimization

“…On the other hand, inserting PM in the fluid region is equivalent to increase the thermal conductivity of the region. Hence, PM is extensively used in heat convection [53,54]. Bhattacharya et al [55] analyzed the pressure drop and thermal performance of hybrid HS with PM and solid fins.…”

Entropy Generation Analysis of Hybrid Nanomaterial through Porous Space with Variable Characteristics

“…Latest developments in flow through a porous medium with constant porosity and permeability and can be cited through refs. [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. However little information is available for variable characteristics of porous space [ 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ]…”

An experimental study of forced convective heat transfer for fully developed Al2O3–water nanofluid in an annulus tube

“…Furthermore, they can be applied for energy applications, such as heat sink, environmental modification, and energy storage. The heat transfer performance could be remarkably improved by using nanofluids 2‐9 . In this regard, several experimental and simulation works have been done to evaluate the nanofluid flow and heat transfer 10‐18 .…”