scholarly journals 2D FLOW OF CASSON FLUID WITH NON-UNIFORM HEAT SOURCE/SINK AND JOULE HEATING

2018 ◽  
Vol 12 ◽  
Author(s):  
Emran Khoshrouye Ghiasi ◽  
Reza Saleh
Keyword(s):  
Heat Source ◽  
Joule Heating ◽  
Casson Fluid ◽  
Uniform Heat ◽  
2D Flow ◽  
Source Sink

Non-Uniform Heat Source or Sink Effect on the Flow of 3D Casson Fluid in the Presence of Soret and Thermal Radiation

2015 ◽  
Vol 20 ◽  
pp. 112-129 ◽  
Author(s):  
Chalavadi Sulochana ◽  
Samrat S. Payad ◽  
Naramgari Sandeep
Keyword(s):  
Differential Equations ◽  
Heat Source ◽  
Thermal Radiation ◽  
Three Dimensional ◽  
Casson Fluid ◽  
Shooting Technique ◽  
Uniform Heat ◽  
Sink Effect ◽  
Flow Heat ◽  
Source Sink

This study deals with the three-dimensional magnetohydrodynamic Casson fluid flow, heat and mass transfer over a stretching surface in the presence of non-uniform heat source/sink, thermal radiation and Soret effects. The governing partial differential equations are transformed to nonlinear ordinary differential equations by using similarity transformation, which are then solved numerically using Runge-Kutta based shooting technique. We obtained good accuracy of the present results by comparing with the exited literature. The influence of dimensionless parameters on velocity, temperature and concentration profiles along with the friction factor, local Nusselt and Sherwood numbers are discussed with the help of graphs and tables. It is found that the positive values of non-uniform heat source/sink parameters acts like heat generators and helps to develop the temperature profiles of the flow.

scholarly journals Casson fluid flow over a vertical cone with non-uniform heat source/sink and high order chemical reaction

2015 ◽  
Vol 12 (2) ◽  
pp. 125-136 ◽  
Author(s):  
D. Mythili ◽  
R. Sivaraj ◽  
M. M. Rashidi ◽  
Z. Yang
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Heat Source ◽  
Chemical Reaction ◽  
Casson Fluid ◽  
High Order ◽  
Vertical Cone ◽  
Uniform Heat ◽  
Order Chemical Reaction ◽  
Source Sink

The present investigation deals with the study of unsteady, free convective Casson fluid flow over a vertical cone saturated with porous medium in the presence of non-uniform heat source/sink, high order chemical reaction and cross diffusion effects. The numerical computation for the governing equations has been performed using an implicit finite difference method of Crank-Nicolson type. The influence of various physical parameters on velocity, temperature and concentration distributions is illustrated graphically and the physical aspects are discussed in detail. Results indicate that temperature dependent heat source/sink plays a vital role on controlling the heat transfer however the surface-dependent heat source/sink also has notable influence on the heat transfer characteristics. It is to be noted that high order chemical reaction has the tendency to dilute the influence of chemical reaction parameter on the species concentration.

Second law analysis of MHD natural convection slip flow of Casson fluid through an inclined microchannel

2020 ◽  
Vol 16 (6) ◽  
pp. 1435-1455 ◽  
Author(s):  
B.J. Gireesha ◽  
A. Roja
Keyword(s):  
Heat Source ◽  
Viscous Dissipation ◽  
Entropy Generation ◽  
Joule Heating ◽  
Internal Heat ◽  
Internal Heat Source ◽  
Casson Fluid ◽  
Content Type ◽  
Flow Through ◽  
Source Sink

PurposeMicrofluidics is one of the interesting areas of the research in thermal and engineering fields due to its wide range of applications in a variety of heat transport problems such as micromixers, micropumps, cooling systems for microelectromechanical systems (MEMS) micro heat exchangers, etc. Lower cost with better thermal performance is the main objective of these devices. Therefore, in this study, the entropy generation in an electrically conducting Casson fluid flow through an inclined microchannel with hydraulic slip and the convective condition hves been numerically investigated. Aspects of viscous dissipation, natural convection, joule heating, magnetic field and uniform heat source/sink are usedDesign/methodology/approachSuitable non-dimensional variables are used to reduce the non-linear system of ordinary differential equations, and then this system is solved numerically using Runge-Kutta-Fehlberg fourth fifth order method along with shooting technique. The obtained numerical solutions of the fluid velocity and temperature are used to characterize the entropy generation and Bejan number. Also, the Nusselt number and skin friction coefficient for various values of parameters are examined in detail through graphs. The obtained present results are compared with the existing one which is perfectly found to be in good agreement.FindingsIt is established that the production of the entropy can be improved with the aspects of joule heating, viscous dissipation and internal heat source/sink. The entropy generation enhances for increasing values of Casson Parameter (β) and Biot number (Bi). Furthermore, it is interestingly noticed that the enhancement of Reynolds number and uniform heat source/sink shows the dual behaviour of the entropy generation due to significant influence of the viscous forces in the region close to the channel walls. It was observed that increasing behaviour of the heat transfer rate for enhancement values of the Eckert number and heat source/sink ratio parameter and the drag force are retarded with higher estimations of Reynolds number.Originality/valueEntropy generation analysis on MHD Casson fluid flow through an inclined microchannel with the aspects of convective, Joule heating, viscous dissipation, magnetism, hydraulic slip and internal heat source/sink has been numerically investigated.

Second law analysis on Hall effect of natural convection flow through vertical channel in the presence of uniform heat source/sink

2020 ◽  
Vol 30 (10) ◽  
pp. 4403-4423
Author(s):  
A. Roja ◽  
B.J. Gireesha
Keyword(s):  
Heat Flux ◽  
Heat Source ◽  
Viscous Dissipation ◽  
Joule Heating ◽  
Radiative Heat ◽  
Vertical Channel ◽  
Radiative Heat Flux ◽  
Content Type ◽  
Uniform Heat ◽  
Source Sink

Purpose Microfluidics is one of the extensive elaborated technologies in thermal and engineering fields due to its wide range of applications, such as micro heat exchangers, micro mixture and microchannel heat sinks, which is used to develop a large number of microscopic devices and systems. Enhancement of thermal energy using verity of nanoliquids is one of the challenges in these applications of microfluidics. Therefore, using single wall carbon nanotubes for enhancement of thermal energy in microchannel is the main purpose of this study. Hall effect of natural convection flow in a vertical channel with slip and temperature jump condition is considered. The impacts of radiative heat flux, uniform heat source/sink, viscous dissipation and joule heating are also taken into account. Design/methodology/approach Suitable non-dimension variables are applied to the governing equations to reduce the system into ordinary differential equations. The reduced nonlinear system is then solved numerically using Runge–Kutta–Fehlberg fourth–fifth-order method along with shooting technique. The impact of different pertinent parameters on numerical solutions of primary velocity, secondary velocity, temperature, entropy generation and Bejan number is comprehensively discussed in detail. Also, the obtained numerical results are compared with existing one which perfectly found to be in good agreement. Findings It is established that, with the aspects of Joule heating, viscous dissipation, radiative heat flux and uniform heat source/sink, the production in the entropy can be improved. Further, it is found that the increasing ratio of wall ambient temperature difference and nanoparticle volume fraction leads to enhance the entropy generation. The same effect reverses with increasing values of fluid wall interaction parameter (FWIP) and rare faction. The irreversibility ratio enhances with larger values of nanoparticle volume fraction and decelerates with increment values of FWIP. Originality/value The impact of single wall carbon nanoliquid in a vertical channel flow by using radiative heat flux, heat source/sink, joule heating and viscous dissipation is first time investigated. Further, the influence of Hall current is explored in detail.

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