Effects of Reynolds and Prandtl Number on Mixed Convection in an Octagonal Channel with a Heat-Generating Hollow Cylinder

Parvin, Salma; Nasrin, Rehena

doi:10.3329/jsr.v4i2.8142

Cited by 11 publications

(9 citation statements)

References 14 publications

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“…The results indicate that the average Nusselt and Sherwood numbers on the heat and contaminant sources strongly depend on the positioning of the exit opening. The same result is fund for octagonal vertical channel by Parvin and Nasrin, 2012 [8]. Sheremet and Shishkin, 2012 [9] studied the time dependent regimes of heat and mass transfer in a ventilated rectangular cavity with heat-conducting walls of finite thickness in the presence of a heat-generating element of constant temperature with account of the radiative heat transfer in the Rosseland approximation.…”

Section: Introductionmentioning

confidence: 69%

Turbulent Mixed Convection in Enclosure Containing a Circular/Square Heat Source

Bouabdallah¹,

Chati²,

Ghernaout³

et al. 2016

IJHT

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In this study, we are interested to the turbulent mixed convection in a ventilated enclosure. A heat source is placed at the middle of the enclosure that's equipped with two openings; one is located at the lower left corner and the other located in the upper right corner. The width of the opening "h" represents 1/5 of the side of the cavity. The walls of the cavity are maintained adiabatic. The temperature of the heat source Th is higher than the room temperature. The width of the heat source "D" is equal to the opening width "h" (D = h). The governing equations of turbulent mixed flow convection in the cavity are solved using finite volumes method. A model k-ε of two-equation was used for closure the equations of turbulent regimes. The Grashof number is set constant (Gr = 10 9 ) and the Reynolds number (Re) varied such that the Richardson number (Ri) takes the values : 0.01, 0.05, 0.1, 1, 2, 5, 10, 20 and 30 (Ri = Gr / Re 2 ). The effects of flow thermal, dynamic parameters, the geometry and heat source dimensions are presented and discussed.

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Section: Introductionmentioning

confidence: 69%

Turbulent Mixed Convection in Enclosure Containing a Circular/Square Heat Source

Bouabdallah¹,

Chati²,

Ghernaout³

et al. 2016

IJHT

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“…The phenomenon of heat and fluid flow for a configuration of isothermal vertical walls, controlled at different temperatures and with adiabatic horizontal walls are well explained [11]. Parvin and Nasrin [12] studied the effects of Reynolds and Prandtl number on mixed convection in an octagonal channel with a heat-generating hollow cylinder.…”

Section: Introductionmentioning

confidence: 99%

“…Parvin and Nasrin [12] studied the effects of Reynolds and Prandtl number on mixed convection in an octagonal channel with a heat-generating hollow cylinder. Most of the previous studies on natural convection in enclosures are related to either side heating or bottom heating [10][11][12][13][14][15][16]. Chowdhury et al [17] has analyzed heat generation effect on natural convection flow in closed cavities.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Natural Convection Flow in a Trapezoidal Cavity Containing a Rectangular Heated Body in Presence of External Oriented Magnetic Field

Akter

Parvin

2018

J. Sci. Res.

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The laminar natural convection flow and heat transfer inside a trapezoidal cavity filled with air and containing a rectangular block is investigated numerically. The left and right walls of the cavity are cold, the top and bottom walls are adiabatic and the rectangular body is heated uniformly. Finite Element Method of Galerkin's weighted residual scheme is used to solve the transport equations with appropriate boundary conditions. The main objective of this study is to explore the influence of pertinent parameters such as Rayleigh number ( ), Hartmann number (Ha) and orientation of the magnetic field () on the flow and heat transfer performance of the fluid while the Prandtl number ( ) is considered fixed. Results indicate that the heat transfer rate is significantly affected by increasing the mentioned parameters.

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“…The variation of the average Nusselt number, the average temperature of the fluid and the temperature at the body centre for various Richardson number had been presented. Very recently, Parvin and Nasrin (2012) investigated Reynolds and Prandtl number effects on mixed convection in an octagonal channel. Couple effects of hydromagnetic and Joule heating on natural convective flow in an obstructed cavity was rigorously analyzed by Rehena where the heat transfer rate grew up with rising Prandtl number while it devalued for increasing magnetic and Joule heating parameters.…”

Section: Introductionmentioning

confidence: 99%

Laminar Free and Forced magnetoconvection through an Octagonal Channel with a Heat Generating Circular Cylinder

Nasrin

Алим

2012

J. nav. arch. mar. engg.

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Effects of Reynolds and Prandtl Number on Mixed Convection in an Octagonal Channel with a Heat-Generating Hollow Cylinder

Cited by 11 publications

References 14 publications

Turbulent Mixed Convection in Enclosure Containing a Circular/Square Heat Source

Turbulent Mixed Convection in Enclosure Containing a Circular/Square Heat Source

Analysis of Natural Convection Flow in a Trapezoidal Cavity Containing a Rectangular Heated Body in Presence of External Oriented Magnetic Field

Laminar Free and Forced magnetoconvection through an Octagonal Channel with a Heat Generating Circular Cylinder

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