Criterial equations for calculating the friction and heat exchange at a vertical porous surface with combined convection

1974 ◽  
Vol 26 (4) ◽  
pp. 412-415
Author(s):  
V. I. Dubovik
Keyword(s):  
Heat Exchange ◽  
Porous Surface ◽  
Combined Convection ◽  
Criterial Equations

Numerical Study of Magnetic Field Influence on Three-Dimensional Flow Regime and Combined-Convection Heat Exchange Within Concentric and Eccentric Rotating Cylinders

2020 ◽  
Vol 142 (11) ◽  
Author(s):  
Javad Sodagar-Abardeh ◽  
Payam Nasery ◽  
Ahmad Arabkoohsar ◽  
Mahmood Farzaneh-Gord
Keyword(s):  
Magnetic Field ◽  
Heat Exchange ◽  
Flow Regime ◽  
Axial Magnetic Field ◽  
Numerical Study ◽  
Outer Cylinder ◽  
Three Dimensional ◽  
Convection Heat ◽  
Combined Convection ◽  
Number Variation

Abstract The forced and natural flows of fluid within an annulus caused by the rotation of cylinders and temperature differences of the inner and outer walls are observed in various engineering applications. In this research, the laminar flow regime and mixed convection inside a ring-shaped horizontal concentric and eccentric space for an incompressible fluid are studied in the existence of an axial magnetic field. The present work is the first effort to investigate the influence of a magnetic field on flow and combined-convection heat exchange characteristics within an annulus with a cold outer cylinder and an inner hot cylinder. Here, the properties of the flow and heat transfer characteristics are studied using the finite volume method. Numerical procedures are mainly investigated for recognizing the influence of Hartmann number (in the range of 0 ≤ Ha ≤ 100), as the representative of the magnetic force, on velocity components, Nusselt number, streamlines, and isothermal lines. One of the notable effects is that when Ha number increases, it will reduce the vorticity of the fluid and buoyancy forces. As a result, streamlines and isothermal lines can be seen more constant as regular concentric circles. A rise in Ha number decreases the range of local Nu number variation for both cylinders. The average Nu number for the outer and inner cylinders has different trends when Ha number increases. Taking concentric cylinders as an example, this parameter for the inner and the outer cylinders increases and decreases by about 1.2 and 1.6, respectively.

Heat exchange during kinetic combustion in the turbulent boundary layer on a porous surface

1974 ◽  
Vol 6 (6) ◽  
pp. 993-999
Author(s):  
V. L. Dorot ◽  
Yu. V. Lapin ◽  
M. Kh. Strelets
Keyword(s):  
Boundary Layer ◽  
Heat Exchange ◽  
Turbulent Boundary Layer ◽  
Porous Surface

Compulsory heat exchange between the heat carrier and bread when moistening air in the baking camera

2019 ◽  
Vol 28 (1) ◽  
pp. 44-48
Author(s):  
S.A. Romanchikov ◽  
Keyword(s):  
Heat Exchange ◽  
Heat Carrier

Influence of the geometrical characteristics of the surface with spherical wells on heat exchange of water and air

2015 ◽  
Vol 2015 (3) ◽  
pp. 50-56 ◽  
Author(s):  
V.V. Dubrovskyi ◽  
◽  
O.M. Pidvysotskyi ◽  
Keyword(s):  
Heat Exchange ◽  
Geometrical Characteristics

COMBINED CONVECTION AND RADIATION HEAT TRANSFER IN NON-GRAY PARTICIPATING MEDIA IN A DIFFERENTIALLY HEATED SQUARE CAVITY

2019 ◽  
Vol 11 (6) ◽  
pp. 489-507 ◽  
Author(s):  
Shashikant Cholake ◽  
S. P. Venkateshan ◽  
Thirumalachari Sundararajan
Keyword(s):  
Heat Transfer ◽  
Radiation Heat Transfer ◽  
Radiation Heat ◽  
Square Cavity ◽  
Participating Media ◽  
Combined Convection

Numerical and Analytical Simulation of Radiative-Convective Heat Exchange in the Composite Elements of Structures and Buildings

2003 ◽  
Vol 34 (1-2) ◽  
pp. 6
Author(s):  
Yu. M. Matsevityi ◽  
A. P. Slesarenko ◽  
N. A. Safonov
Keyword(s):  
Heat Exchange ◽  
Convective Heat ◽  
Convective Heat Exchange ◽  
Analytical Simulation

Some Specific Features of the Flow and Heat Exchange of Dissociated Gas in a Circular Tube

1998 ◽  
Vol 29 (4-5) ◽  
pp. 294-299
Author(s):  
A. A. Vasil'yev ◽  
V. F. Vishnyak ◽  
I. I. Didenko ◽  
V. N. Panchenko
Keyword(s):  
Heat Exchange ◽  
Circular Tube

Influence of Secondary Vortices of Thermogravitational Convection on the Liquid Metal Heat Exchange in a Horizontal Tube in a Magnetic Field

2006 ◽  
Vol 37 (8) ◽  
pp. 691-706 ◽  
Author(s):  
L. G. Genin ◽  
Ya. I. Listratov ◽  
N. G. Razuvanov ◽  
S. A. Ryzhkova ◽  
V. G. Sviridov
Keyword(s):  
Magnetic Field ◽  
Heat Exchange ◽  
Liquid Metal ◽  
Horizontal Tube ◽  
Thermogravitational Convection ◽  
Secondary Vortices

Combined Convection of Synthetic Jet for Microelectronic Application

2020 ◽  
Author(s):  
Mohd Azmi Ismail ◽  
Roger H Zhen Yu ◽  
Muhammad Iftishah Ramdan ◽  
Yu Kok Hwa
Keyword(s):  
Synthetic Jet ◽  
Combined Convection
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