The influence of MHD and heat generation/absorption in a Newtonian flow field manifested with a Cattaneo–Christov heat flux model

2019 ◽  
Vol 94 (8) ◽  
pp. 085217 ◽  
Author(s):  
Usman Ali ◽  
Khalil Ur Rehman ◽  
M Y Malik
Keyword(s):  
Heat Flux ◽  
Flow Field ◽  
Heat Generation ◽  
Newtonian Flow ◽  
Flux Model ◽  
Heat Flux Model

Non-Fourier thermal analysis on transport of heat and momentum in viscoelastic fluid over convectively heat surface in the presence of thermal memory effects

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Saima Batool ◽  
Muhammad Nawaz ◽  
Mohammed Kbiri Alaoui
Keyword(s):  
Heat Flux ◽  
Relaxation Time ◽  
Heat Generation ◽  
Thermal Relaxation ◽  
Maxwell Fluid ◽  
Literature Survey ◽  
Hybrid Nanofluid ◽  
Content Type ◽  
Flux Model ◽  
Heat Flux Model

PurposeThis study presents a mathematical approach and model that can be useful to investigate the thermal performance of fluids with microstructures via hybrid nanoparticles in conventional fluid. It has been found from the extensive literature survey that no study has been conducted to investigate buoyancy effects on the flow of Maxwell fluid comprised of hybrid microstructures and heat generation aspects through the non-Fourier heat flux model.Design/methodology/approachNon-Fourier heat flux model and non-Newtonian stress–strain rheology with momentum and thermal relaxation phenomena are used to model the transport of heat and momentum in viscoelastic fluid over convectively heated surface. The role of suspension of mono and hybrid nanostructures on an increase in the thermal efficiency of fluid is being used as a medium for transportation of heat energy. The governing mathematical problems with thermo-physical correlations are solved via shooting method.FindingsIt is noted from the simulations that rate of heat transfer is much faster in hybrid nanofluid as compare to simple nanofluid with the increasing heat-generation coefficient. Additionally, an increment in the thermal relaxation time leads to decrement in the reduced skin friction coefficient; however, strong behavior of Nusselt number is shown when thermal relaxation time becomes larger for hybrid nanofluid as well as simple nanofluid.Originality/valueAccording to the literature survey, no investigation has been made on buoyancy effects of Maxwell fluid flow with hybrid microstructures and heat generation aspects through non-Fourier heat flux model. The authors confirm that this work is original, and it has neither been published elsewhere nor is it currently under consideration for publication elsewhere.

scholarly journals Finite difference solution of convective flow of Upper-Convected Maxwell fluid over a horizontal wedge with suction and heat generation using Cattaneo-Christov heat flux model

2019 ◽  
pp. 270-270
Author(s):  
Muhammad Asmadi ◽  
Ruhaila Kasmani ◽  
Zailan Siri ◽  
Sivanandam Sivasankaran
Keyword(s):  
Differential Equation ◽  
Ordinary Differential Equation ◽  
Heat Flux ◽  
Finite Difference ◽  
Heat Generation ◽  
Wedge Angle ◽  
Maxwell Fluid ◽  
Local Similarity ◽  
Flux Model ◽  
Heat Flux Model

Boundary layer flow of Upper-Convected Maxwell fluid over a wedge with suction and heat generation/absorption is presented in this paper by considering the Cattaneo-Christov heat flux model. The governed equations are transformed into a set of the ordinary differential equation using similarity transformations. A third-order finite difference method for the ordinary differential equation is used to find the local similarity solutions of the problems. The effects of the wedge angle parameter, viscoelastic fluid parameter, thermal relaxation time parameter, and heat generation/absorption parameter are presented in this study.

Research on Heat Flux Distribution in Deep Grinding

2008 ◽  
Author(s):  
D. H. Zhu ◽  
B. Z. Li ◽  
J. G. Yang
Keyword(s):  
Heat Flux ◽  
Flux Distribution ◽  
Theoretical Expression ◽  
Uniform Heat Flux ◽  
Heat Transfer Mechanism ◽  
Heat Flux Distribution ◽  
Workpiece Surface ◽  
Quadratic Curve ◽  
Flux Model ◽  
Heat Flux Model

This paper studies the heat transfer mechanism in deep grinding process, especially the heat flux to the workpiece. On the basis of triangle moving heat source, a quadratic curve heat flux model in the grinding zone was developed to determine the heat flux distribution and to estimate the surface temperature of workpiece. From the calculated theoretical expression of heat flux to the workpiece, the quadratic curve heat flux can be understood as the superposition of square law heat flux, triangular heat flux and uniform heat flux in the grinding zone. Then four heat flux models using the determined amount of heat flux were applied to estimate the workpiece surface temperatures which were compared with that measured by the embedded thermocouple. It has been found that the quadratic curve heat flux distribution seems to give the best match with measured and theoretical temperature, although square law heat flux model is good enough to predict the temperature.

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