Numerical investigation of double-diffusive mixed convection in horizontal annulus partially filled with a porous medium

Moderres, Mourad; Abboudi, Saïd; Ihdene, Malika; Aberkane, Sofiane; Ghezal, Abderrahmane

doi:10.1108/hff-10-2015-0434

Cited by 8 publications

(6 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The behavior of the fluid flow driven by a combination of temperature and solute concentration gradients is called double-diffusive convection (Gireesha et al , 2017; Rahman et al , 2017; Moderres et al , 2017; Akbar et al , 2016; Chen et al , 2013). In recent period, double-diffusive convection may appear in a wide range of scientific fields such as biology, oceanology, astrophysics, geology, chemical processes, crystal-growth techniques and the situations in which both the concentration gradient and temperature gradients are in the vertical direction (Subhashini et al , 2011; Mahdy, 2010; Nield and Kuznetsov, 2011).…”

Section: Introductionmentioning

confidence: 99%

Effects of dissolved solute on unsteady double-diffusive mixed convective flow of a Buongiorno’s two-component nonhomogeneous nanofluid

Kashani

Dinarvand

Pop

et al. 2019

HFF

View full text Add to dashboard Cite

Purpose The purpose of this paper is to numerically study the unsteady double-diffusive mixed convective stagnation-point flow of a water-based nanofluid accompanied with one salt past a vertical flat plate. The effects of Brownian motion and thermophoresis parameters are also introduced through Buongiorno’s two-component nonhomogeneous equilibrium model in the governing equations. Design/methodology/approach In the present explanation of double-diffusive mixed convective model, there are four boundary layers entitled: velocity, thermal, solutal concentration and nanoparticle concentration. The resulting basic equations are solved numerically via an efficient Runge–Kutta fourth-order method with shooting technique after the governing nonlinear partial differential equations are converted into a system of nonlinear ordinary differential equations by the use of similarity transformations. Findings To avail the physical insight of problem, the effects of the mixed convection parameter, unsteadiness parameter and salt/nanoparticle parameters on the boundary layers behavior are investigated. Moreover, four possible types of diffusion problems entitled: double-diffusive nanofluid (DDNF), double-diffusive regular fluid (DDRF), mono-diffusive nanofluid (MDNF) and mono-diffusive regular fluid (MDRF) are considered to analyze and compare them in concepts of heat and mass transfer. Originality/value The results demonstrate that, for a regular fluid, without nanoparticle and salt (MDRF), the dimensionless heat transfer rate is smaller than other diffusion cases. As we include nanoparticle and salt (DDNF), the rate of heat transfer increases due to an increase in thermal conductivity and rate of diffusion of salt. Moreover, it is observed that the highest heat transfer rate is obtained for the situation that the thermophoretic effect of nanoparticles is negligible. Besides, the heat transfer rate enhances with the increase in the regular double-diffusive buoyancy parameter of salt.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of dissolved solute on unsteady double-diffusive mixed convective flow of a Buongiorno’s two-component nonhomogeneous nanofluid

Kashani

Dinarvand

Pop

et al. 2019

HFF

View full text Add to dashboard Cite

show abstract

“…This fact is called thermosolutal or double-diffusive convection. The occurrence of the double-diffusion process materializes in the field of geology, oceanography, biology, chemical processes and astrophysics, as well as in the discipline of engineering such as crystal manufacturing, metal solidification processes and natural gas storage tanks (Huppert and Turner, 1981; Pandit and Hansda, 2022; Omara et al , 2022; Moderres et al , 2017). Kumar and Murthy (2010) explored thermosolutal convection in a non-Darcian porous corrugated chamber.…”

Section: Introductionmentioning

confidence: 99%

On the analysis of thermosolutal mixed convection in differentially heated and soluted geometries beyond rectangular

Hansda

Pandit

2023

HFF

View full text Add to dashboard Cite

Purpose This paper aims to study the impact of convexity and concavity of the vertical borders on double-diffusive mixed convection. In addition, the study of entropy generation is performed. This numerical study has been carried out for different patterns of wavy edges to reveal their effects on heat and mass transfer phenomena. Design/methodology/approach Four different flow features are treated by varying the directions of convexity and concavity of the vertical walls. A uniform temperature, as well as concentration distributions, are introduced to the left border while keeping a cold temperature and low concentration for the right border. The horizontal boundaries are in adiabatic condition. The upper border of the chamber is moving in the right direction with an equal speed. The governing Navies–Stokes equations are designed to describe energy and species transport phenomena, and these equations are solved by compact scheme. Findings The investigated results are analyzed for various parameters, namely, Prandtl number, Richardson number, thermal Grashof number, Lewis number, Buoyancy ratio and amplitude of the wavy walls. It is observed that the thermal and solutal transfer performance becomes effective with lower Richardson numbers. The results reveal that the concavity and convexity of the side borders of the cabinet can control the thermosolutal performance. It is also observed that among all wavy chambers, Case-4 records maximum thermosolutal transfer rate, while Case-3 attains minimum thermosolutal transfer rate. Originality/value This work is an example of solar thermal power conversion, power collection systems, systems of energy deficiency, etc.

show abstract

“…The annulus geometry was studied in a few cases. Moderres et al [20], investigated numerically double-diffusive convection within a tri-dimensional in a horizontal annulus partially filled with a fluid-saturated porous medium. In their study, the average Nusselt and Sherwood numbers were presented as a function of the Lewis number, thermal Grashof number, and buoyancy ratio.…”

Section: Introductionmentioning

confidence: 99%

Double-diffusive natural convection in a cavity with an inner cylinder wrapped by a porous layer

Moderres¹,

Benmalek

Sofiane

et al. 2022

THERM SCI

Self Cite

View full text Add to dashboard Cite

This paper reports a numerical study of double-diffusive natural convection through an annular space delimited by a square cylinder on the outside and a cylindrical cylinder on the inside covered by a porous layer. The Darcy-Brinkmann-Forchheimer is used for modeling flow in both fluid and porous areas. The annular space is partially or completely filled with an isotropic porous medium. A finite volume method, using the Patankar-Spalding technique is used for solving the discretization of the dimensionless equations governing the problem. The effects of simultaneously applied thermal and solutal buoyancy forces on heat and mass transfer are shown in the results for a large range of buoyancy ratios N, Rayleigh number, and thermal conductivity. Streamlines, isotherms, and iso-concentrations are presented to analyze the flow structure transition from mass species dominated to thermal dominated flow. Results show that the buoyancy ratio can change the flow pattern and the increased thermal conductivity ratio can improve heat and mass transfer. A good agreement was obtained between the present results and those published were found.

show abstract

Numerical investigation of double-diffusive mixed convection in horizontal annulus partially filled with a porous medium

Cited by 8 publications

References 45 publications

Effects of dissolved solute on unsteady double-diffusive mixed convective flow of a Buongiorno’s two-component nonhomogeneous nanofluid

Effects of dissolved solute on unsteady double-diffusive mixed convective flow of a Buongiorno’s two-component nonhomogeneous nanofluid

On the analysis of thermosolutal mixed convection in differentially heated and soluted geometries beyond rectangular

Double-diffusive natural convection in a cavity with an inner cylinder wrapped by a porous layer

Contact Info

Product

Resources

About