G. Sarojamma

Sri Padmavati Mahila Visvavidyalayam | SPVV · Department of Applied Mathematics

Background: Heat transfer in nanofluid flows plays a vital role in many industrial, medical, and manufacturing industries. Hybrid nanofluid (HNF) has a significant potential to enhance the thermal characteristics of several fluids employed in a wide range of thermal systems and thus uses reduced energy and provides increased sustainability. Also, t...

In this research communication, assessment of entropy in the MHD flow of a hybrid nanofluid (Cu–Al2O3 /H2O) and a mono-nanofluid (Cu–H2O) of a thin film across an elongated plane with radiative heat is explored. Computational solutions of the equations describing the model are derived employing scaling analysis followed by RKF-45-based shooting tec...

In the present paper, the augmented heat characteristics of a hybrid nanofluid which is a blend of Al2O3 (alumina) and Ag (silver) in the host hybrid fluid (C2H6O2‐H2O) (50%–50%) impinging obliquely on an elastic surface with magnetic lines of force are investigated. The properties of the nanofluid are assessed through the computational solutions e...

This research communication explores the impact of wall slips along with the suspension of nanomaterials in a chemically reactive micropolar liquid stream on a stretched surface with convective heating. Activation of energy is analyzed through the modified Arrhenius function. Radiative heat flux with nonlinearity and temperature‐dependent thermal s...

The current research work is devoted to study the exploration of dissipation and chemical reaction on MHD radiative Casson nanoliquid thin film flow generated due to the sheet stretching. Brownian motion, viscous dissipation, radiation and chemical reactions are considered, respectively, in energy and concentration equations. The popularly used sim...

Little is known on the three-dimensional flow of couple stress Casson fluid conveying nanoparticles when the significance of Lorentz force, chaotic gesture of those minute particles and thermophoresis are significant. The intent of this investigation is to focus on the flow of such fluid along a horizontal surface due to dual stretching and interna...

The importance of thermophoresis and its essential role in particle migration have led to many published reports (i.e. aim and objectives). However, there exists no report on thermo-migration of tiny/nano-sized particles in the motion of various fluids. A meta-analysis on the significance of either nano or tiny particles exposed to thermophoretic f...

The present research explores the features of thermal and solutal transport of a 3D micropolar liquid stream on an elongated convectively heated inclined sheet taking Soret effect. Mathematical modelling is designed with the aid of suitable scaling analysis on the governing PDEs conceiving the small magnetic Reynolds number. The resultant set of co...

The candid objective of this study is to simulate stagnation point flow of the MHD chemically reactive Maxwell based nanofluid under the action of Arrhenius activation energy function with radiative thermal energy and frictional heating. Application of scaling analysis followed by the RKF-45 method to the governing flow equations yield the computat...

The flows of non-Newtonian fluid over upper horizontal surfaces of rockets, over bonnets of cars, and pointed surfaces of aircraft are of great importance to the experts in the field of space sciences, automobile construction, and aerodynamic industry where efficiency is dependent on the thickness of paraboloid of revolution, buoyancy, and autocata...

In this report, the effects of homogeneous-heterogeneous autocatalytic chemical reaction together with the variable thermal conductivity in the Maxwell fluid flow due to nonlinear surface of variable thickness are investigated. Thermal radiation and heat generation / absorption effects are also incorporated in the analysis. Appropriate scaling anal...

During the homogeneous-heterogeneous autocatalytic chemical reaction in the dynamics of micropolar fluid, relaxation of heat transfer is inevitable; hence Cattaneo-Christov heat flux model is investigated in this report. In this study, radiative heat flux through an optically thick medium is treated as nonlinear due to the fact that thermal radiati...

Study of thermal radiative heat transport is relevant in several industrial applications. Analysis of radiative heat transfer in Newtonian fluids under different conditions has been studied extensively. However, not much attention has been paid to analyze the non-linear thermal radiative heat transfer in non-Darcy Casson fluid flows over stretching...

The partial derivative DOW is missing in Eqs. (3–5) in the original publication. The corrected equations are shown below.

This analysis intends to address the coupled effect of phase change heat transfer, thermal radiation, and viscous heating on the MHD flow of an incompressible chemically reactive nanofluid in the vicinity of the stagnation point toward the stretching surface, taking a Jeffrey fluid as the base fluid. Convergent analytical solutions for the nonlinea...

In the present work, dynamical aspects of boundary layer flow of hydromagnetic fluid (suspended with microorganisms) are investigated near the stagnation region over a stretchable heated permeable sheet. Viscosity is taken as a linear function of temperature where the flow field accommodates diffusion processes due to temperature and concentration...

Analysis of nonlinear radiative heat transfer on the MHD Maxwell fluid flow in the boundary layers adjacent to a sheet with continuous stretching is discussed. Numerical solution of the PDEs governing the flow is obtained by the successive application of suitable similarity variables and BVP4c method. The flow variables, surface frictional coeffici...

This study addresses the thermal energy transport in a slippery sheet-driven flow of a micropolar fluid analysing the effect of radiative heat flux. The solution of PDEs of the governing the flow is derived numerically by the application of self-similarity transformations and Runge-Kutta Fehlberg algorithm along with shooting method. The computatio...

In this paper we discuss the MHD unsteady flow of a micropolar nanofluid through a vertical channel with expanding/contracting walls under the influence of nonlinear thermal radiation considering weak permeability. The PDEs of the governing problem are reduced into a set of ODEs by using self-similar transformations and are then solved numerically....

The present study discusses two dimensional Darcy-Forchheimer steady flow of a doubly stratified Maxwell nanofluid over a sheet of continuous stretching. Analysis of thermal energy and species concentration is carried out incorporating radiative heat, thermal and solutal stratifications, Brownian motion and thermophoresis. By introducing suitable t...

A mathematical model is established to examine the influence of viscous dissipation and joule heating on magnetohydrodynamic (MHD) flow of an incompressible viscoelastic nanofluid over a convectively heated stretching sheet. Brownian motion and thermophoresis effects have been introduced in this nanofluid model. The governing equations are transfor...

Dynamics of blood containing gold nanoparticles on a syringe and other objects with a nonuniform thickness is of importance to experts in the industry. This study presents the significance of partial slip (i.e. combination of linear stretching and velocity gradient) and buoyancy on the boundary layer flow of blood-gold Carreau nanofluid over an upp...

The intent of this study is to analyse the influence of nonlinear thermal radiation, thermophoresis, second order slip and magnetic field on the doubly stratified flow of a non-Newtonian micropolar fluid induced by a stretched sheet along with transport of thermal energy and mass species. The radiative heat flux term is modified using the non-linea...

This paper deals with the analysis pertaining to the transport phenomena of thermal energy and species mass in a non-Darcy Maxwell fluid flow induced by a erected porous stretching surface considering the effect of non-linear radiative heat, Newtonian heating, thermodiffusion and wall slip. Introduction of self-similarity transformations recast the...

The present analysis investigates non-orthogonal stagnation point flow and heat transfer of a dual stratified Casson fluid in the presence of radiation. A set of partial differential equations of the physical model is transformed into a system of coupled non-linear ordinary differential equations as a first step (or initially) and then are solved n...

This analysis pertains to the non-Newtonian nanofluid impinging the surface of stretching obliquely. The base fluid under discussion obeys the constitutive equation of a UCM fluid. Use of similarity variables and RKF 45 numerical method along with shooting technique enabled us to obtain the solution of the problem. The effects of physical parameter...

An analysis is carried out to study the influence of thermal radiation on the unsteady MHD flow, heat and mass transfer on a radially stretching sheet immersed in a chemically reactive Jeffrey nanofluid. Using Homotopy Analysis Method (HAM) analytical solutions are obtained for the flow variables. The h-curves for the velocity, temperature and nano...

An analysis illustrating the flow of an Ostwald-de-Waele liquid film on an unsteady stretching sheet under the influence of thermocapillary force, magnetic field and viscous dissipation is carried out. In this study, thermal conductivity is assumed to be a function of fluid temperature. Numerical solutions for the partial differential equations gov...

In this study we analyze the effects of thermal radiation and surface mass transfer on the flow generated by a shrinking sheet. Homotopy analysis method (HAM) is employed to obtain analytical solutions for the flow, temperature and mass concentration fields. The plots for the velocity, temperature and concentration fields are presented and their be...

A mathematical model for the time dependent flow of a Casson fluid due to a stretching sheet embedded in a rotating fluid subject to a uniform magnetic field, with thermal radiation, viscous dissipation and chemical reaction of nth order is investigated. The equations governing the flow are formulated and solved numerically by introducing suitable...

In this paper the characteristics of flow, radiative heat and mass transfer of a viscous fluid flow over a permeable sheet stretching exponentially with Hall currents in the presence of heat generation and first order chemical reaction are investigated. The non – linear partial differential equations governing the flow are transformed into a set of...

The present analysis deals with the effect of Hall currents, thermal radiation on the mixed convection flow of a viscous incompressible electrically conducting fluid past an unsteady porous stretching sheet embedded in a porous medium under the influence of transverse uniform magnetic field in the presence of thermophoresis and chemical reaction wi...

In this paper an analysis has been made to study the characteristics of heat and mass transfer in a non-Darcy flow induced due to a vertical permeable stretching surface embedded in a fluid saturated porous medium in the presence of thermal radiation and viscous dissipation taking the Soret effect and wall slip into account. Similarity variables ha...

In this paper the effects of velocity slip, Joule heating viscous dissipation and chemical reaction on the MHD flow heat and mass transfer of a viscous fluid over a stretching wedge with Hall currents are investigated. The equations governing the flow are solved numerically and the results are discussed computationally. The primary and secondary ve...

In this paper the effects of suction, thermal radiation, heat generation on the unsteady flow of a Casson fluid over an exponentially stretching sheet in the presence of Hall currents with convective boundary condition is investigated. The governing equations of the flow are formulated and solved numerically on introducing suitable similarity trans...

This paper deals with the effects of Hall currents on the unsteady flow of an incompressible viscous fluid past a vertical linearly stretching surface in the presence of thermal radiation, viscous dissipation, radiation absorption and chemical reaction. On introducing the similarity transformation the partial differential equations governing the fl...

A mathematical model for the time dependent flow of a Casson fluid due to a stretching sheet embedded in a rotating fluid subject to a uniform magnetic field, with thermal radiation, viscous dissipation and chemical reaction of nth order is investigated. The equations governing the flow are formulated and solved numerically by introducing suitable...

The aim of this investigation is to analyze the effectiveness of Lorentz force, viscous dissipation and internal heating on the heat and flow characteristics of a non-Newtonian Casson fluid thin film resting on a stretching surface under the influence of a magnetic field. Employing suitable similarity variables and shooting technique and integratin...

The MHD unsteady flow heat and mass transfer of a viscous incompressible fluid induced by a stretching surface in a rotating fluid taking the effects of thermal radiation, heat absorption and first order chemical reaction into account with convective boundary condition. The rotation parameter is found to reduce the velocities and the magnetic param...

In this study the unsteady flow of a viscous incompressible fluid past a stretching wedge under the influence of a transverse magnetic field, viscous dissipation, and wall slip is investigated. The governing partial differential equations of the flow are solved numerically. The point of flow separation is observed to occur at small times and for sm...

The objective of the present analysis is to understand the effects of Hall currents and chemical reaction on the unsteady flow of a viscous incompressible fluid past an exponentially stretching sheet in the presence of temperature dependent heat source and thermal radiation with slip effects.

The influence of thermophoresis and viscous dissipation on the unsteady boundary layer flow of an incompressible, viscous electrically conducting fluid over a sheet that stretches exponentially in the presence of temperature dependent heat source with chemical reaction is analysed. It is observed that the suction, magnetic field parameter, wall sli...

The non – linear boundary layer flow of a viscous incompressible electrically conducting fluid over a linearly stretching sheet in a rotating fluid in the presence of Hall currents, thermal radiation, heat source/ sink with Soret and Dufour effects. The partial differential equations governing the flow are numerically solved using fourth order Rung...

An analysis the flow, heat and mass transfer on mixed convection flow of a viscous incompressible electrically conducting fluid past an unsteady porous stretching sheet subject to a magnetic field in the presence of viscous dissipation and chemical reaction with radiation absorption is carried out. Numerically solutions of the governing equations a...

An analysis has been carried out to investigate the effects of Hall currents, heat absorption/generation, cross diffusion by the simultaneous action of mass flux due to temperature gradient (Soret effect) and heat flux (Dufour effect) in the boundary layer flow past a linearly stretching sheet embedded in a porous medium in the presence of thermal...

The dispersion of a solute in an annulus modeling blood as Herschel-Bulkley fluid is studied by using the generalized dispersion model. The impact of the presence of catheter and the non-Newtonian nature of blood is studied. It is observed that the yield stress and presence of catheter inhibit the rate of dispersion. The dispersion coefficient is f...

This paper is focused on the study of effect of heat and mass transfer on chemically reacting boundary layer flow of a Casson fluid over a porous stretching sheet in the differential equations are transformed by introducing similarity variables and solved numerically by using shooting method. The velocity, temperature and concentration distribution...

In this paper, diffusion of solute in a Newtonian fluid flowing in a pipe/channel under the influence of transverse magnetic field with interphase mass transfer at the boundaries is analysed using the generalized dispersion model. The study describes the development of dispersive transport following the injection of a tracer in terms of the three e...

In this paper the dispersion of a solute in an oscillatory flow of a Newtonian fluid in circular pipe in the presence of a uniform transverse magnetic field is studied. Periodic body acceleration is also applied. Exact solution of the equation governing the flow is obtained using the finite Hankel and Laplace transform technique. Generalized disper...

The dispersion of a solute in a Herschel-Bulkley fluid is studied by using the generalized dispersion model in both pipe and channel. With this method the entire dispersion process is described as a simple diffusion process with the effective diffusion coefficient as a function of time. The results for Newtonian fluid, power law fluid and Bingham f...

The unsteady dispersion of a solute in blood flow modeling blood as a Newtonian fluid under the influence of a body acceleration is studied using the generalized dispersion model proposed by Gill and Sankarasubramanian [13]. As a result, the total process of dispersion can be described in terms of a simple diffusion process with the effective diffu...

The dispersion of a solute in a Newtonian fluid flowing through a tube under the influence of magnetic field is studied. The generalized dispersion model is used to solve unsteady convective diffusion equation. As a result, the total process of dispersion can be described in terms of a simple diffusion process with effective diffusion coefficient a...

The combined effect of annular gap, yield stress and irreversible boundary reaction on the dispersion process in a Casson fluid flow is studied using generalized dispersion model. The study describes the development of dispersive transport following the injection of a tracer in terms of the three effective transport coefficients viz. absorption, co...

The pulsatile flow of blood through a stenosed artery under the influence of external periodic body acceleration is studied. The effect of non-Newtonian nature of blood in small blood vessels has been taken into account by modeling blood as a Casson fluid. The non-linear coupled equations governing the flow are solved using perturbation analysis as...

Longitudinal dispersion of passive tracer molecules in a Casson fluid flow through an annular pipe with a reactive outer wall is studied using generalized dispersion model, which is valid for all times after the solute injection. The study describes the development of dispersive transport following the injection of a tracer in terms of the three ef...

Peristaltic motion of a non-Newtonian, incompressible power law fluid with suspension of small particles in a two-dimensional channel is analyzed. A perturbation method has been employed to obtain the solution of the problem under the long wavelength approximation. The formation and growth of trapping zone are explained for variations in amplitude...

The pulsatile flow of blood through a stenosed artery under the influence of external periodic body acceleration is studied. The effect of non-Newtonian nature of blood in small blood vessels has been taken into account by modeling blood as a Casson fluid. The non-linear coupled equations governing the flow are solved using perturbation analysis as...

The dispersion of a solute in the flow of a Casson fluid in an annulus is studied. The generalized dispersion model is employed to study the dispersion process. The effective diffusion coefficient, which describes the whole dispersion process in terms of a simple diffusion process, is obtained as a function of time, in addition to its dependence on...

The peristaltic transport of a Casson fluid in a two-dimensional asymmetric channel is studied under long- wavelength and low-Reynolds number assumption. The asymmetry in the channel is created by considering the peristaltic waves imposed on the boundary walls to possess different amplitude and phase. The analysis of the flow is carried out in a wa...

The combined effect of yield stress and irreversible boundary reaction on dispersion process in a Casson fluid flowing in a conduit (pipe/channel) is studied using the generalized dispersion model proposed by Sankarasubramanian and Gill (Sankarasubramanian, R., and W. N. Gill. Proc. R. Soc. London, Ser. A 333:115-132, 1973). The study describes the...

We discuss the combined free and forced convection flow of a viscous incompressible fluid in a vertical pipe of variable cross-section. The governing nonlinear equations are solved in terms of the stream function and temperature. The behaviour of the velocity, temperature and heat transfer coefficient is discussed numerically in detail.

The paper studies the combined free and forced convection in a rotating, viscous, incompressible fluid confined between two parallel porous plates. Assuming that the temperature varies linearly along the plates and the pressure gradient maintained uniform over the planes parallel to the plates, the velocity, temperature and the stresses are calcula...