Numerical study of double diffusive buoyancy forces induced natural convection in a trapezoidal enclosure partially heated from the right sidewall

Gholizadeh, Mohammad; Nikbakhti, Rasoul; Khodakhah, Javad; Ghasemi, Amirmahdi

doi:10.1016/j.aej.2016.01.029

Cited by 26 publications

(8 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was concluded that the dimensionless parameters and tilts angle affected the average and total Nusselt number at the heated wall. Gholizadeh et al (2016) performed a numerical work to study double diffusive natural convection within a partially heated trapezoidal enclosure. They used Partial Differential Equation (PDE) to generate regular grid mesh.…”

Section: Trapezoidal Enclosuresmentioning

confidence: 99%

A comprehensive review on natural convection flow and heat transfer

Rahimi

Saee

Kasaeipoor

et al. 2019

HFF

View full text Add to dashboard Cite

Purpose The purpose of this paper is to carry out a comprehensive review of some latest studies devoted to natural convection phenomenon in the enclosures because of its significant industrial applications. Design/methodology/approach Geometries of the enclosures have considerable influences on the heat transfer which will be important in energy consumption. The most useful geometries in engineering fields are treated in this literature, and their effects on the fluid flow and heat transfer are presented. Findings A great variety of geometries included with different physical and thermal boundary conditions, heat sources and fluid/nanofluid media are analyzed. Moreover, the results of different types of methods including experimental, analytical and numerical are obtained. Different natures of natural convection phenomenon including laminar, steady-state and transient, turbulent are covered. Overall, the present review enhances the insight of researchers into choosing the best geometry for thermal process. Originality/value A comprehensive review on the most practical geometries in the industrial application is performed.

show abstract

Section: Trapezoidal Enclosuresmentioning

confidence: 99%

A comprehensive review on natural convection flow and heat transfer

Rahimi

Saee

Kasaeipoor

et al. 2019

HFF

View full text Add to dashboard Cite

show abstract

“…By means of the 'Element based Finite Volume Method', Silva et al [29] has studied natural convection inside trapezoidal enclosures. Gholizadeh et al [30] has explored the natural convection inside a trapezoidal enclosure where the right inclined wall was partially heated, by means of the finite difference method. In a porous trapezoidal enclosure saturated through a power-law non-Newtonian fluid, Yazdani et al [31] has considered natural convection as well as entropy production.…”

Section: Introductionmentioning

confidence: 99%

Unsteady Natural Convection in An Initially Stratified Air-filled Trapezoidal Enclosure Heated from below

Mahafujur¹,

Bhowmick²,

Mondal³

et al. 2022

Preprint

View full text Add to dashboard Cite

Natural convection is intensively explored, especially in a valley-shaped trapezoidal enclosure, because of its broad presence in both technical settings and nature. This study deals with a trapezoidal cavity, which is initially filled with linearly stratified air. Though the side walls remain adiabatic, the bottom wall is heated, and the top wall is cooled. For the stratified fluid (air), the temperature of the fluid adjacent to the top and the bottom walls is the same as that of the walls. Natural convection in the trapezoidal cavity is simulated in two dimensions using numerical simulations, by varying Rayleigh numbers (Ra) from 100 to 108 with constant Prandtl number, Pr = 0.71, and aspect ratio, A = 0.5. According to numerical results, the development of transient flow within the enclosure owing to the predefined conditions for boundary may be categorized into three distinct stages: early, transitional, and steady or unsteady. The flow characteristics at each of the three phases and the impact of the Rayleigh number on the flow’s growth are stated in this study. In addition, heat transfer through the bottom and the top surfaces is described in this study.

show abstract

“…Fluid flows due to temperature variations, and concentration variations are known as double diffusion convection or thermosolute convection 35 . Exploration of double‐diffusive free convection in trapezoidal cavities are minimal 36–38 . Double‐diffusion natural convection in a porous medium can be observed in various fields of science and engineering, for example, geothermal and oil extraction applications, dispersion of chemical pollutants via water‐drenched soil, movement of the moisture through fibrous insulation, porous insulations, dispersion of contaminated materials in underground water reservoirs, diffusion of chemical contaminants in saturated soil, packed bed reactors, dumping of nuclear wastes, geothermal reservoirs, grain storage and drying, and in petrochemical and electrochemical procedures 39,40 …”

Section: Introductionmentioning

confidence: 99%

Double‐diffusive flow in a porous right‐angle trapezoidal enclosure with constant heat flux

Khan

Qasim

et al. 2021

Math Methods in App Sciences

View full text Add to dashboard Cite

A computation analysis is performed to study double‐diffusive natural convection in a right‐angle trapezoidal cavity packed with a porous medium. The horizontal top and bottom boundaries are insulated and impermeable. The vertical left sidewall is kept at a constant heat flux and high concentration, whereas the inclined sidewall is held at lower temperature and concentration. The dimensionless nonlinear system is solved by employing the finite difference method along the successive Under Relaxation technique. The findings are compared and validated with the existing literature for the Darcy flow driven through a single buoyancy effect (difference in density is only due to temperature variations) in a porous square enclosure. The numerical results are expressed in the form of streamlines, isotherms and iso‐concentrations, and local and average Nusselt and Sherwood numbers. It is observed that the buoyancy parameter reduces the dimensionless temperature of the cavity and increases the dimensionless concentration due to the strong impact of buoyancy. Smaller values of the Lewis number enhance heat transfer, whereas higher values reduce it. Moreover, the Rayleigh number and buoyancy parameter enhance both surface heat and concentration rates.

show abstract

Numerical study of double diffusive buoyancy forces induced natural convection in a trapezoidal enclosure partially heated from the right sidewall

Cited by 26 publications

References 47 publications

A comprehensive review on natural convection flow and heat transfer

A comprehensive review on natural convection flow and heat transfer

Unsteady Natural Convection in An Initially Stratified Air-filled Trapezoidal Enclosure Heated from below

Double‐diffusive flow in a porous right‐angle trapezoidal enclosure with constant heat flux

Contact Info

Product

Resources

About