Natural convection flow of second-grade fluid along a vertical heated surface with variable heat flux

The present analysis is concerned to examine the enhancement of heat transfer in natural convection flow of nanofluid through a vertical wavy plate assumed at variable heat flux. The rate of heat transfer in nanofluid flow as compared to pure water can be increased due to increase the density of nanofluid which depends on the density and concentration of nanoparticles. For this analysis, Tiwari and Das model is used by considering two nanoparticles i. e. Al2O3 and Cu are suspended in a base fluid (water). A very efficient implicit finite difference technique converges quadratically is applied on the concerning PDE for numerical solution. The effects of pertinent parameters namely, volume fraction parameter of nanoparticle, wavy surface amplitude, Prandtl number and exponent of variable heat flux on streamlines, isothermal lines, local skin friction coefficient and local Nusselt number are shown through graphs. In this analysis, a maximum heat transfer rate is noted in Cu-water nanofluid through a vertical wavy surface as compared to Al2O3-water and pure water.

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Natural convection flow of a second grade fluid in an infinite vertical cylinder

Scientific Reports ◽

10.1038/s41598-020-64533-z ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Maria Javaid ◽

M. Imran ◽

M. A. Imran ◽

I. Khan ◽

K. S. Nisar

Keyword(s):

Natural Convection ◽

Vertical Cylinder ◽

Second Grade ◽

Convection Flow ◽

Second Grade Fluid ◽

Natural Convection Flow ◽

Grade Fluid

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Natural convection flow of second grade fluid with thermal radiation and damped thermal flux between vertical channels

Alexandria Engineering Journal ◽

10.1016/j.aej.2019.09.014 ◽

2019 ◽

Vol 58 (4) ◽

pp. 1119-1125 ◽

Cited By ~ 3

Author(s):

Zaib Un Nisa ◽

Nehad Ali Shah ◽

Iskander Tlili ◽

Saif Ullah ◽

Mudassar Nazar

Keyword(s):

Natural Convection ◽

Thermal Radiation ◽

Thermal Flux ◽

Second Grade ◽

Convection Flow ◽

Second Grade Fluid ◽

Natural Convection Flow ◽

Grade Fluid

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Modeling and simulation of natural convection flow along a rough surface of sinusoidal nature with variable heat flux: Using Keller box scheme

Thermal Science ◽

10.2298/tsci170929106g ◽

2019 ◽

Vol 23 (6 Part A) ◽

pp. 3391-3400

Author(s):

Abuzar Ghaffari ◽

Tariq Javed ◽

Irfan Mustafa ◽

Fotini Labropulu

Keyword(s):

Heat Flux ◽

Nusselt Number ◽

Natural Convection ◽

Skin Friction Coefficient ◽

Convection Flow ◽

Natural Convection Flow ◽

Local Skin ◽

Variable Heat ◽

Variable Heat Flux ◽

Local Skin Friction

In this study, natural convection flow along a vertical wavy surface has been investigated with variable heat flux. The governing equations are transformed into dimensionless PDE by using the non-dimensional variables and then solved numerically by using an implicit finite difference scheme known as Keller Box method. The effects of the parameters amplitude of the wavy surface, ?, exponent of the variable heat flux, m, and Prandtl number on the local skin friction coefficient and local Nusselt number are shown graphically. It is found that for the negative value of exponent of the variable heat flux, m, the local skin friction coefficient increases and Nusselt number decreases but the opposite behavior is observed for the positive values of m. The comparison of limiting case with the previous study is shown through table and it is found that the solution obtained is in excellent agreement with the previous studies.

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