A Numerical Study on Magneto-Hydrodynamic Mixed Convection Flow

2014 ◽  
Author(s):  
C. Bozkaya
Keyword(s):  
Mixed Convection ◽  
Numerical Study ◽  
Convection Flow ◽  
Mixed Convection Flow

Numerical Study of Combined Radiation and Turbulent Mixed Convection Heat Transfer in a Compartment Containing Participating Media

2015 ◽  
Vol 31 (4) ◽  
pp. 467-480 ◽  
Author(s):  
A. Asghari ◽  
S. A. Gandjalikhan Nassab ◽  
A. B. Ansari
Keyword(s):  
Mixed Convection ◽  
Stokes Equations ◽  
Numerical Study ◽  
Fluid Dynamic ◽  
Convection Heat Transfer ◽  
Simple Algorithm ◽  
Convection Flow ◽  
Algebraic Equations ◽  
Mixed Convection Flow ◽  
Participating Media

AbstractThe effect of radiation on turbulent mixed convection flow, generated by two plane wall jets with different temperatures inside a cavity was studied numerically. The medium is treated as a gray, absorbing, emitting and scattering. The two-dimensional Reynolds-average Navier-Stokes equations, coupled with the energy equation are solved by using the computational fluid dynamic (CFD) techniques, while the AKN low-Reynolds-number model is employed for computation of turbulence fluctuations. The Boussinesq approximation is used to calculate the buoyancy term, and the radiation part of the problem is solved by numerical solution of the radiative transfer equation (RTE) with the well known discrete ordinate method (DOM). The governing equations are discretized by the finite volume technique into algebraic equations and solved with the SIMPLE algorithm. The effects of radiation conduction parameter, scattering albedo, optical thickness and Richardson number on the thermal behavior of the system are carried out. Results show that the gas radiation has a significant effect on the temperature distribution inside the turbulent mixed convection flow.

scholarly journals Numerical study of magneto-hydrodynamic (MHD) mixed convection flow in a lid-driven triangular cavity

2015 ◽  
Vol 12 (1) ◽  
pp. 21-32
Author(s):  
Mohammed Nasir Uddin ◽  
Aki Farhana ◽  
Md. Abdul Alim
Keyword(s):  
Rayleigh Number ◽  
Prandtl Number ◽  
Mixed Convection ◽  
Hartmann Number ◽  
Numerical Study ◽  
Bulk Temperature ◽  
Convection Flow ◽  
Mixed Convection Flow ◽  
Coupled Equations ◽  
Wide Range

In the present paper, the effect of magneto-hydrodynamic (MHD) on mixed convection flow within a lid-driven triangular cavity has been numerically investigated. The bottom wall of the cavity is considered as heated. Besides, the left and the inclined wall of the triangular cavity are assumed to be cool and adiabatic. The cooled wall of the cavity is moving up in the vertical direction. The developed mathematical model is governed by the coupled equations of continuity, momentum and energy to determine the fluid flow and heat transfer characteristics in the cavity as a function of Rayleigh number, Hartmann number and the cavity aspect ratio. The present numerical procedure adopted in this investigation yields consistent performance over a wide range of parameters Rayleigh number Ra (103-104), Prandtl number Pr (0.7 - 3) and Hartmann number Ha (5 - 50). The numerical results are presented in terms of stream functions, temperature profile and Nussult numbers. It is found that the streamlines, isotherms, average Nusselt number, average fluid bulk temperature and dimensionless temperature in the cavity strongly depend on the Rayleigh number, Hartmann number and Prandtl number.

Numerical Study of Mixed Convection Flow in an Impinging Jet CVD Reactor for Atmospheric Pressure Deposition of Thin Films

2004 ◽  
Vol 126 (5) ◽  
pp. 764-775 ◽  
Author(s):  
S. P. Vanka ◽  
Gang Luo ◽  
Nick G. Glumac
Keyword(s):  
Thin Films ◽  
Mixed Convection ◽  
Atmospheric Pressure ◽  
Flow Reactor ◽  
Numerical Study ◽  
Impinging Jet ◽  
Convection Flow ◽  
Moderate Pressure ◽  
Operating Pressure ◽  
Mixed Convection Flow

A systematic numerical study has been conducted of the mixed convection flow in a novel impinging jet chemical vapor deposition (CVD) reactor for deposition of thin films at atmospheric pressure. The geometry resembles that of a pancake reactor but the inflow gases enter through a small nozzle to provide high inlet momentum. A finite-volume-based computational procedure is used to integrate the governing flow, energy, and scalar transport equations with high accuracy. The effects of the temperature dependent properties are fully accounted for. The effects of operating pressure, wafer rotation rate, and inlet flow rate of the carrier gas are investigated. The main benefit of the new geometry is the suppression of the buoyancy-driven flow even at atmospheric pressures due to the lower mixed convection parameter. We show that the new geometry can produce thin films of high radial uniformity and also with high growth rate. Comparisons are also made with a conventional stagnation flow reactor for which it is shown that beyond a moderate pressure (∼0.1 atm), the flow is dominated by natural convection, and the reactor is unsuitable for practical use.

Numerical study of mixed convection flow in a lid-driven cavity with sinusoidal heating on sidewalls using nanofluid

2012 ◽  
Vol 51 (6) ◽  
pp. 893-911 ◽  
Author(s):  
A.A. Abbasian Arani ◽  
S. Mazrouei Sebdani ◽  
M. Mahmoodi ◽  
A. Ardeshiri ◽  
M. Aliakbari
Keyword(s):  
Mixed Convection ◽  
Numerical Study ◽  
Convection Flow ◽  
Mixed Convection Flow ◽  
Driven Cavity

scholarly journals A 3D numerical simulation of a mixed convection flow in a building integrated photovoltaic thermal (BIPV/T) front

2021 ◽  
Vol 321 ◽  
pp. 03011
Author(s):  
Malika Boufkri ◽  
Btissam Abourida ◽  
Smaine Kouidri ◽  
Mohamed Sannad ◽  
Lahoucine Belarche
Keyword(s):  
Heat Transfer ◽  
Mixed Convection ◽  
Numerical Study ◽  
Three Dimensional ◽  
Solar Panel ◽  
Convection Flow ◽  
Mixed Convection Flow ◽  
Thermal Front ◽  
Left Wall ◽  
Building Integrated Photovoltaic

In the present paper, a numerical study of mixed convection flow of a three-dimensional building integrated photovoltaic thermal front (BIPV/T) has been investigated. The configuration consists of a cubical system heated by a solar panel partition. The left wall has an inlet damper at the bottom allowing the cold air flotation in a gap between the solar panel and the opposite vertical insulated wall. The finite volume method is used to analyze the dynamic, thermal fields and the heat transfer flow of the system. The results revealed that the heat transfer rate is affected by Reynolds and Nusselt number’s variations.

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