Alexadria Engineering Journal, Volume (1), No (55), Year (2016-6) , Pages (1271-1283)

Title : ( Unaxisymmetric Stagnation-point Flow And Heat Transfer of A Viscous Fluid With Variable Viscosity On A Cylinder In Constsnt Heat Flux )

Authors: Rasool Alizadeh , Asgar Bradaran Rahimi , Reza Arjmandzadeh , Mohammad Najafi , Ahmad Alizadeh ,

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Existing solutions of the problem of axisymmetric stagnation-point flow and heat transfer on either a cylinder or flat plate are for incompressible fluid. Here, fluid with viscosity proportional to a linear function of temperature is considered in the problem of an unaxisymmetric stagnation-point flow and heat transfer of an infinite stationary cylinder with non-uniform normal transpiration and constant heat flux. The impinging free-stream is steady and with a constant strain rate . A reduction of Navier-Stokes and energy equations is obtained by use of appropriate similarity transformations. The semi-similar solution of the Navier-Stokes equations and energy equation has been obtained numerically using an implicit finite-difference scheme. All the solutions above are presented for Reynolds numbers, , ranging from 0.01 to 100 for different values of Prandtl number and viscosity-variation parameter and for selected values of transpiration rate function, , where is cylinder radius and is the reference kinematic viscosity of the fluid. Dimensionless shear-stresses corresponding to all the cases increase with the increase of Reynolds number and transpiration rate function while dimensionless shear stresses decrease with the increase of viscosity-variation parameter. The local coefficient of heat transfer (Nusselt number) increases with the increasing transpiration rate function and Prandtl number.

Keywords

, Unaxisymmetric stagnation-point flow, Heat transfer, Stationary cylinder, Temperature dependent viscosity, Numerical solution, Non-uniform
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@article{paperid:1057957,
author = {Rasool Alizadeh and Bradaran Rahimi, Asgar and Reza Arjmandzadeh and Mohammad Najafi and Ahmad Alizadeh},
title = {Unaxisymmetric Stagnation-point Flow And Heat Transfer of A Viscous Fluid With Variable Viscosity On A Cylinder In Constsnt Heat Flux},
journal = {Alexadria Engineering Journal},
year = {2016},
volume = {1},
number = {55},
month = {June},
issn = {1110-0168},
pages = {1271--1283},
numpages = {12},
keywords = {Unaxisymmetric stagnation-point flow; Heat transfer; Stationary cylinder; Temperature dependent viscosity; Numerical solution; Non-uniform transpiration},
}

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%0 Journal Article
%T Unaxisymmetric Stagnation-point Flow And Heat Transfer of A Viscous Fluid With Variable Viscosity On A Cylinder In Constsnt Heat Flux
%A Rasool Alizadeh
%A Bradaran Rahimi, Asgar
%A Reza Arjmandzadeh
%A Mohammad Najafi
%A Ahmad Alizadeh
%J Alexadria Engineering Journal
%@ 1110-0168
%D 2016

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