Numerical investigation of the unsteady solid-particle flow of a tangent hyperbolic fluid with variable thermal conductivity and convective boundary

An analysis is carried out to investigate the influence of variable thermal conductivity and partial velocity slip on hydromagnetic two-dimensional boundary layer flow of a nanofluid with Cu nanoparticles over a stretching sheet with convective boundary condition. Using similarity transformation, the governing boundary layer equations along with the appropriate boundary conditions are transformed to a set of ordinary differential equations. Employing Runge-kutta fourth-order method along with shooting technique, the resultant system of equations is solved. The influence of various pertinent parameters such as nanofluid volume fraction parameter, the magnetic parameter, radiation parameter, thermal conductivity parameter, velocity slip parameter, Biot number, and suction or injection parameter on the velocity of the flow field and heat transfer characteristics is computed numerically and illustrated graphically. The present results are compared with the existing results for the case of regular fluid and found an excellent agreement.

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Numerical investigation of CO2 emission and thermal stability of a convective and radiative stockpile of reactive material in a cylindrical pipe of variable thermal conductivity

10.1063/1.4898446 ◽

2014 ◽

Cited By ~ 6

Author(s):

Ramoshweu Solomon Lebelo

Keyword(s):

Thermal Conductivity ◽

Thermal Stability ◽

Numerical Investigation ◽

Co2 Emission ◽

Variable Thermal Conductivity ◽

Cylindrical Pipe ◽

Reactive Material ◽

Thermal Stability Of

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Mathematical model for thermal and entropy analysis of thermal solar collectors by using Maxwell nanofluids with slip conditions, thermal radiation and variable thermal conductivity

Open Physics ◽

10.1515/phys-2018-0020 ◽

2018 ◽

Vol 16 (1) ◽

pp. 123-136 ◽

Cited By ~ 13

Author(s):

Asim Aziz ◽

Wasim Jamshed ◽

Taha Aziz

Keyword(s):

Thermal Conductivity ◽

Mathematical Model ◽

Thermal Radiation ◽

Entropy Generation ◽

Mathematical Formulation ◽

Variable Thermal Conductivity ◽

Skin Friction Coefficient ◽

Working Fluid ◽

Convective Boundary ◽

Unsteady Stretching Surface

Abstract In the present research a simplified mathematical model for the solar thermal collectors is considered in the form of non-uniform unsteady stretching surface. The non-Newtonian Maxwell nanofluid model is utilized for the working fluid along with slip and convective boundary conditions and comprehensive analysis of entropy generation in the system is also observed. The effect of thermal radiation and variable thermal conductivity are also included in the present model. The mathematical formulation is carried out through a boundary layer approach and the numerical computations are carried out for Cu-water and TiO2-water nanofluids. Results are presented for the velocity, temperature and entropy generation profiles, skin friction coefficient and Nusselt number. The discussion is concluded on the effect of various governing parameters on the motion, temperature variation, entropy generation, velocity gradient and the rate of heat transfer at the boundary.

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