Quadratic convective transport of Cu‐Al 2 O 3 hybrid nanoliquid with Hall current, variable suction, and exponential heat source

2021 ◽  
Author(s):  
Glory Mary Givi ◽  
Mahanthesh B
Keyword(s):  
Heat Source ◽  
Hall Current ◽  
Convective Transport ◽  
Variable Suction

Effectiveness of exponential heat source, nanoparticle shape factor and Hall current on mixed convective flow of nanoliquids subject to rotating frame

2019 ◽  
Vol 15 (4) ◽  
pp. 758-778 ◽  
Author(s):  
B. Mahanthesh ◽  
Amala S. ◽  
Gireesha B.J. ◽  
I.L. Animasaun
Keyword(s):  
Heat Transfer ◽  
Heat Source ◽  
Chemical Reaction ◽  
Shape Factor ◽  
Hall Current ◽  
Flowing Fluid ◽  
Content Type ◽  
Laplace Transform Technique ◽  
The Impact ◽  
Rotating Plate

Purpose The study of novel exponential heat source (EHS) phenomena across a flowing fluid with the suspension of nanoparticles over a rotating plate in the presence of Hall current and chemical reaction has been an open question. Therefore, the purpose of this paper is to investigate the impact of EHS in the transport of nanofluid under the influence of strong magnetic dipole (Hall effect), chemical reaction and temperature-dependent heat source (THS) effects. The Khanafer-Vafai-Lightstone model is used for nanofluid and the thermophysical properties of nanofluid are calculated from mixture theory and phenomenological laws. The simulation of the flow is also carried out using the appropriate values of the empirical shape factor for five different particle shapes (i.e. sphere, hexahedron, tetrahedron, column and lamina). Design/methodology/approach Using Laplace transform technique, exact solutions are presented for the governing nonlinear equations. Graphical illustrations are pointed out to represent the impact of involved parameters in a comprehensive way. The numeric data of the density, thermal conductivity, dynamic viscosity, specific heat, Prandtl number and Nusselt number for 20 different nanofluids are presented. Findings It is established that the nanofluid enhances the heat transfer rate of the working fluids; the nanoparticles also cause an increase of viscous. The impact of EHS advances the heat transfer characteristics significantly than usual thermal-based heat source (THS). Originality/value The effectiveness of EHS phenomena in the dynamics of nanofluid over a rotating plate with Hall current, chemical reaction and THS effects is first time investigated.

scholarly journals Effectiveness of Hall current and exponential heat source on unsteady heat transport of dusty TiO2-EO nanoliquid with nonlinear radiative heat

2019 ◽  
Vol 6 (4) ◽  
pp. 551-561 ◽  
Author(s):  
Basavarajappa Mahanthesh ◽  
Nagavangala Shankarappa Shashikumar ◽  
Bijjanal Jayanna Gireesha ◽  
Isac Lare Animasaun
Keyword(s):  
Boundary Layer ◽  
Nusselt Number ◽  
Heat Source ◽  
Friction Factor ◽  
Skin Friction ◽  
Heat Transport ◽  
Radiative Heat ◽  
Hall Current ◽  
Dust Particles ◽  
Numeric Data

Abstract The problem of exponential heat source across a flowing nanofluid (TiO2-EO; titanium oxide-Engine oil) containing tiny dust particles on a deformable planar plate has been an open question in meteorology. In this paper, the boundary layer transient two-phase flow of dusty nanoliquid on an isothermal plate which is deforming with time-dependent velocity in the presence of exponential heat source is studied. The impacts of Hall current, nonlinear radiative heat and an irregular heat source (temperature based heat source and exponential space-based heat source) are also accounted. Dusty nanofluid is the composition of dust particles and nanoliquid (TiO2-EO). Using relevant transformations, the system of PDEs is rehabilitated to the system of ODEs and then treated numerically. Exploration of the impacts of pertinent parameters on velocity and temperature fields is performed via graphical illustrations. Numeric data for skin friction factor and the Nusselt number is presented and their characteristics are analyzed/quantified through the slope of linear regression via data points. Highlights Boundary layer flow of dusty nanoliquid past a isothermal plate is studied. Impacts of Hall current and irregular heat source are also accounted. Role of physical parameters are focused in momentum and heat transport distributions. Numeric data for skin friction factor and the Nusselt number is presented.

scholarly journals Perturbation analysis of thermophoresis, hall current and heat source on flow dissipative aligned convective flow about an inclined plate

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
G. Dharmaiah ◽  
O.D. Makinde ◽  
K.S. Balamurugan
Keyword(s):  
Mass Transfer ◽  
Heat Source ◽  
Skin Friction ◽  
Chemical Reaction ◽  
Magnetic Parameter ◽  
Hall Current ◽  
Perturbation Technique ◽  
Heated Plate ◽  
Inclined Plate ◽  
The Impact

This present examination researches the impacts of thermophoresis, heat source and Hall current on dissipative adjusted MHD joint convection stream about an inclined plate inserted in a permeable medium. Utilizing dimensionless variables, the system of partial differential equations is changed into dimensionless equations. By making use of perturbation technique, estimated solutions for velocity, temperature, concentration profiles, skin friction, rate of heat transfer and rate of mass transfer have been determined. The attained results are explained with an assistance of diagrams to examine the impact of distinct parameters such as Magnetic parameter (M), Aligned magnetic parameter (ξ), Schmidt number (Sc), Eckert number (Ec), inclined angle (α), Prandtl number (Pr), heat generation parameter (Q), and chemical reaction (Kr), assuming two cases viz. Case I: Gr < 0, Gm < 0 (flow on heated plate); Case II: when Gr > 0, Gm > 0(flow on cooled plate). Additionally, the impacts of the appropriate parameters on the skin-friction coefficient and rates of heat and mass transfer are numerically furnished in tabular form. Skin friction coefficients are firmly diminished as magnetic field rises. Sherwood and Nusselt numbers boost up as enhance in chemical reaction.

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