Variable fluid properties and thermal radiation effects on flow and heat transfer in micropolar fluid film past moving permeable infinite flat plate with slip velocity

The steady boundary layer flow and heat transfer of a viscous fluid on a moving flat plate in a parallel free stream with variable fluid properties are studied. Two special cases, namely, constant fluid properties and variable fluid viscosity, are considered. The transformed boundary layer equations are solved numerically by a finite-difference scheme known as Keller-box method. Numerical results for the flow and the thermal fields for both cases are obtained for various values of the free stream parameter and the Prandtl number. It is found that dual solutions exist for both cases when the fluid and the plate move in the opposite directions. Moreover, fluid with constant properties shows drag reduction characteristics compared to fluid with variable viscosity.

Download Full-text

Nusselt number evaluation for combined radiative and convective heat transfer in flow of gaseous products from combustion

Thermal Science ◽

10.2298/tsci110531083t ◽

2013 ◽

Vol 17 (4) ◽

pp. 1093-1106 ◽

Cited By ~ 1

Author(s):

Soraya Trabelsi ◽

Wissem Lakhal ◽

Ezeddine Sediki ◽

Mahmoud Moussa

Keyword(s):

Heat Transfer ◽

Radiation Effects ◽

Combustion Products ◽

Radiative Properties ◽

Inlet Temperature ◽

Gaseous Products ◽

Nusselt Numbers ◽

Coupled Heat Transfer ◽

Flow And Heat Transfer ◽

Fluid Properties

Combined convection and radiation in simultaneously developing laminar flow and heat transfer is numerically considered with a discrete-direction method. Coupled heat transfer in absorbing emitting but not scattering gases is presented in some cases of practical situations such as combustion of natural gas, propane and heavy fuel. Numerical calculations are performed to evaluate the thermal radiation effects on heat transfer through combustion products flowing inside circular ducts. The radiative properties of the flowing gases are modeled by using the absorption distribution function (ADF) model. The fluid is a mixture of carbon dioxide, water vapor, and nitrogen. The flow and energy balance equations are solved simultaneously with temperature dependent fluid properties. The bulk mean temperature variations and Nusselt numbers are shown for a uniform inlet temperature. Total, radiative and convective mean Nusselt numbers and their axial evolution for different gas mixtures produced by combustion with oxygen are explored.

Download Full-text

Influence of Hall Current on MHD Flow and Heat Transfer over a slender stretching sheet in the presence of variable fluid properties

Communications in Numerical Analysis ◽

10.5899/2016/cna-00251 ◽

2016 ◽

Vol 2016 (1) ◽

pp. 17-36 ◽

Cited By ~ 7

Author(s):

K. Vajravelu ◽

K. V. Prasad ◽

Hanumesh Vaidya

Keyword(s):

Heat Transfer ◽

Stretching Sheet ◽

Hall Current ◽

Mhd Flow ◽

Flow And Heat Transfer ◽

Variable Fluid Properties ◽

Fluid Properties

Download Full-text

Unsteady Flow and Heat Transfer of a MHD Micropolar Fluid Over a Porous Stretching Sheet in the Presence of Thermal Radiation

Journal of Mechanics ◽

10.1017/jmech.2013.33 ◽

2013 ◽

Vol 29 (3) ◽

pp. 559-568 ◽

Cited By ~ 5

Author(s):

G. C. Shit ◽

R. Haldar ◽

A. Sinha

Keyword(s):

Heat Transfer ◽

Boundary Layer ◽

Differential Equations ◽

Thermal Radiation ◽

Boundary Layer Flow ◽

Micropolar Fluid ◽

Stretching Sheet ◽

Flow And Heat Transfer ◽

Non Linear ◽

Layer Flow

AbstractA non-linear analysis has been made to study the unsteady hydromagnetic boundary layer flow and heat transfer of a micropolar fluid over a stretching sheet embedded in a porous medium. The effects of thermal radiation in the boundary layer flow over a stretching sheet have also been investigated. The system of governing partial differential equations in the boundary layer have reduced to a system of non-linear ordinary differential equations using a suitable similarity transformation. The resulting non-linear coupled ordinary differential equations are solved numerically by using an implicit finite difference scheme. The numerical results concern with the axial velocity, micro-rotation component and temperature profiles as well as local skin-friction coefficient and the rate of heat transfer at the sheet. The study reveals that the unsteady parameter S has an increasing effect on the flow and heat transfer characteristics.

Download Full-text