D. Srinivasacharya

D. Srinivasacharya
National Institute of Technology Warangal | NITW · Department of Mathematics

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219
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Publications

Publications (219)
Article
Full-text available
The linear and nonlinear stability of double-diffusive convection in a porous layer saturated with micropolar fluid is examined. A transverse magnetic field is applied to the flow together with vertical throughflow. The normal mode technique is employed for linear stability analysis, whereas the energy method is used for nonlinear stability analysi...
Article
Full-text available
The linear and nonlinear stability analyses of micropolar fluid flow in a horizontal porous layer heated from below in the presence of throughflow is numerically investigated. The Brinkman model is considered to govern the micropolar fluid flow within the porous region. The main purpose of the present study is to investigate the behavior of the sub...
Article
The objective of this investigation is to examine the stability of the mixed convection flow of micropolar fluid in a vertical channel. The analytical solutions for the basic velocity, microrotation, and temperature are achieved by assuming the flow is steady, unidirectional, and fully developed. The differential equations for the perturbed state a...
Article
The influence of variable gravity on the stability analysis has been investigated in a horizontal porous region with throughflow under a local thermal non-equilibrium (LTNE) situation. Flow inside the porous region is considered to be followed by the Darcy model. Also, the linear varying gravity field with height and nonlinear (parabolic, cubic, an...
Article
Full-text available
The aim of this article is to study the bioconvection flow of Casson fluid over a vertically stretching sheet. Applying similarity transformations, the system of non-linear ordinary differential equations is obtained from the equations governing the flow. The significance of this study is solving these nonlinear ordinary differential equations by e...
Article
The onset of longitudinal convective rolls of nanofluid flow inside a horizontal porous material using Brinkman theory due to the viscous dissipation effect has been addressed numerically. An infinitely long horizontal porous region has been considered which is confined between two rigid boundaries. The boundaries of the channel are considered adia...
Article
The effect of variable gravity on the onset of convection in a horizontal porous layer has been analyzed due to external heating. The third kind of thermal boundary conditions is considered on both the boundaries which are connected by Biot numbers B0 and B1. Also, the Brinkman model has been employed in the momentum equation. Further, linear and q...
Article
This study has looked into the beginning of double-diffusive convection in a horizontal fluid-saturated porous layer for both linear and nonlinear cases. Vertical throughflow and the magnetic field effects are taken into consideration during the investigation. The normal mode technique and the energy method are, respectively, employed to analyze th...
Article
In this investigation, the influence of local thermal non-equilibrium (LTNE) on the onset of convection in a channel occupied with nanofluid was examined. The flow took place in the presence of a transverse magnetic field. The Buongiorno and two-field models (each independently signifying the fluid and particle phases) were used for the nanofluid a...
Article
A numerical and theoretical analysis of the viscous fluid across a vertical cone in the presence of joule heating and magnetic impacts is organized in this segment of the work; this study involves numerous applications in the science, engineering, and industrial fields. The flow model is designed in the form of mathematical equations, and for the s...
Chapter
This study explores the impact of double dispersion effects on the nonlinear convective flow of power-law fluid along an inclined plate. Besides, the density differences with concentration and temperature are assumed to be larger and also convective thermal condition is considered at the boundary. Governing nonlinear partial differential equations...
Article
With an aim to investigate the pulsatile flow of blood through a bifurcated artery with mild stenosis in the parent lumen in the manifestation of heat transmission. The blood is treated to be copper suspended nanofluid. The arteries forming bifurcation are assumed to be symmetric about the axis of the parent artery and straight circular cylinders o...
Article
The present article illustrates the influence of heat source on MHD blood flow in a branched artery with small obstacle in its main artery by treating blood as micropolar fluid. Artery forming branch is presumed as straight cylinder of restricted length and is symmetric about its axis. The irregular shape of constricted branched artery is changed t...
Article
In this article, we are exploring the hemodynamics of nanofluid, flowing through a bifurcated artery with atherosclerosis in the presence of a catheter. For treating obstruction in the artery, one can use the catheter whose outer surface is carrying the drug coated with nano-particles. The resultant solvent is considered as blood nano-fluid. Blood...
Article
Full-text available
The stability of nanofluid flow in a vertical channel packed with a porous medium is examined for the local thermal non-equilibrium state of the fluid, particle and solid-matrix phases. The effects of Brownian motion along with thermophoresis are incorporated in the nanofluid model. The Darcy-Brinkman model for the flow in a porous medium and three...
Article
Full-text available
The mixed convection of a nanofluid flow past an inclined wavy surface in the existence of gyrotactic microbes is considered. To convert the wavy surface to a plane surface, a transformation of coordinates is applied. The governing equations that are nonlinear and the accompanying boundary conditions are converted into a dimensionless form using ps...
Article
Full-text available
This article examines the bio-convection of an incompressible nanofluid past an inclined wavy surface. Buongiorno’s model which takes account of Brownian motion and thermophoresis is used for nanofluid. A coordinate transformation is utilized to convert the wavy surface to a plane surface. The equations governing the flow and the accompanying bound...
Article
Full-text available
This contribution examines the influence of Soret and Dufour on an incompressible viscous fluid flow across a vertical cone. The flow model is framed in the form of mathematical governing equations and a nondimensionalization is performed on them for ease of the numerical computations' examination; the obtained nonsimilarity equations are solved nu...
Article
Full-text available
The convection in a vertical channel filled with a porous medium saturated by a nanofluid is studied numerically. The effects of Brownian motion and thermophoresis are incorporated in the model used for nanofluid. Also, the flow within the porous region is governed by Brinkman's equation. The generalized eigenvalue problem for the perturbed state i...
Article
Full-text available
The bioconvection in an unsteady flow of an incompressible couple-stress fluid consists of microorganisms between two parallel plates is considered. A model containing coupled non-linear system of partial differential equations for the mass, momentum, energy, mass diffusion, and microorganisms is reduced to a set of non-linear ordinary differential...
Article
This paper deals with the bioconvection of microploar fluid in an annulus containing microorganisms in which the outer cylinder is rotating. A mathematical model, with a fully coupled system of partial differential equations presenting the velocity, total mass, momentum, thermal energy, mass diffusion, and motile microorganisms is presented. A suit...
Article
This present analysis studies the impact of an inclined magnetic field, hall current and thermal radiation on fully developed electrically conducting mixed convection flow through a channel. The governing equations are non dimensionalized. The resulting system of nonlinear ordinary differential equations is solved utilizing Spectral Quasilinearizat...
Article
Full-text available
The bioconvection flow of an incompressible micropolar fluid containing microorganisms between two infinite stretchable parallel plates is considered. A mathematical model, with a fully coupled nonlinear system of equations describing the total mass, momentum, thermal energy, mass diffusion, and microorganisms is presented. The governing equations...
Article
Full-text available
This article analyses the influence of viscous dissipation and thermoporesis effects on the viscous fluid flow over a porous sheet stretching exponentially by applying convective boundary condition. The numerical solutions to the governing equations are evaluated using a local similarity and non-similarity approach along with a successive linearisa...
Chapter
The effect of porous medium on blood flow through an artery with bifurcation and a mild stenosis in the parent lumen under the influence of an applied magnetic field is investigated in the present work. Blood is taken to be couple stress fluid. The arterial division is assumed to be symmetrical. The governing equations for flow of blood are reduced...
Chapter
The present article investigates the entropy generation of micropolar fluid flow between two circular cylinders. The fluid flow in an annulus is due to the rotation of the outer cylinder with constant velocity. The two cylinders are maintained at different constant wall temperatures. A numerical solution using spectral quasi-linearisation method is...
Chapter
The present work addresses the influence of thermal radiation and chemical reaction effects on the viscous fluid flow over a porous sheet stretching exponentially by employing convective boundary condition. The numerical solutions to the governing equations are evaluated using succesive linearization procedure together with Chebyshev collocation me...
Chapter
In the present article, the effect of Joule heating and thermophoresis on unsteady natural convection flow of electrically conducting fluid along a vertical plate is analyzed. In addition, double stratification and a Darcy–Brinkman porous medium are considered. Initially, the governing nonlinear time-dependent equations are transformed into a set o...
Chapter
The natural convection of electrically conducting nanofluid flow in an annular region between two concentric circular cylinders considering Hall current and ion-slip effects. The governing equations are nondimensionalized and solved utilizing HAM. The influence of Hall, ion-slip parameter, thermophoresis parameter, the magnetic parameter, and Brown...
Article
The effect of double dispersion on the free convective flow of an Ostwald-de Waele power-law fluid along an inclined plate under the convective thermal condition is studied. In addition, the nonlinear Boussinesq approximation (also known as nonlinear convection) is taken into account to address the heat and mass transfer phenomena of some of the th...
Article
The present article analyses the significance of Hall current, double stratification and cross-diffusion effects on the laminar slip flow over an exponentially stretching surface in a incompressible viscous fluid. The numerical solutions to the governing equations are evaluated using a local similarity and non-similarity approach along with success...
Article
The role of nonlinear Boussinesq approximation (i.e., also known as a nonlinear convection) on the free convective flow of Ostwald-de Waele power-law fluid through a non-Darcy porous medium along an inclined plate is examined numerically. In addition, the convective thermal boundary condition, diffusion-thermal and thermaldiffusion effects are take...
Article
Full-text available
This article explores the influence of double dispersion on micropolar fluid flow past an inclined plate in a homogeneous and isotropic non-Darcy porous medium. Additionally, the effect of nonlinear Boussinesq approximation (i.e., also known as nonlinear convection) with the convective thermal condition is considered to address the heat and mass tr...
Article
Full-text available
This article focuses on the effect of radiation on mixed convection in a nanofluid along an inclined wavy surface embedded in a non-Darcy porous medium. A coordinate transformation is employed to transform the complex wavy surface to a smooth surface. The governing equations are transformed into a set of partial differential equations using the non...
Article
Full-text available
In the present investigation, a problem of natural convective flow of a non-Newtonian power-law fluid over an inclined plate saturated in a non-Darcy porous medium is considered. Also, the nonlinear Boussinesq approximation and convective thermal boundary condition are taken into account to address heat and mass transfer phenomena of thermal system...
Article
Full-text available
A problem of mixed convective flow of a non-Newtonian power-law fluid over an inclined plate embedded in a non-Darcy porous medium under convective thermal boundary condition is attempted in the present investigation. In addition, the nonlinear temperature–concentration-dependent density relation taken into account to address thermal and solutal tr...
Article
This article presents the effect of convective heating and velocity slip on flow generation of an incompressible micropolar fluid through a porous channel. The flow is induced by a constant axial pressure gradient applied in the flow direction. The non-linear governing equations are linearized using the quasilinearization technique and then solved...
Article
A steady, laminar, incompressible, and electrically conducting boundary-layer flow of a viscous fluid past an exponentially stretching sheet is considered with the Hall effect and heat source. The sheet velocity varies as an exponential function of the distance x from the slit. It is assumed that the viscosity and thermal conductivity vary as a lin...
Article
This article investigates the influence of cross-diffusion on the viscous fluid flow over a porous sheet stretching exponentially by applying the convective thermal conditions. Velocity slip at the boundary is considered. The numerical solutions to the governing equations are evaluated using successive linearisation procedure and Chebyshev collocat...
Article
A numerical investigation has been carried out on two-dimensional steady state mixed-convection heat and mass transfer on a vertical plate in a power-law fluid saturated Darcy porous medium. The effects of variable viscosity, thermal conductivity, and thermophoresis are analyzed. The governing equations (continuity, momentum, energy, and concentrat...
Article
The role of nonlinear variation of density with temperature (NDT) and concentration (NDC) on the free convective flow of non-Darcy micropolar fluid over an inclined plate has been studied for the first time. In addition, the modified form of thermal slip and isothermal condition is utilized to address heat transfer phenomena in nuclear plants, text...
Article
Full-text available
The aim of the paper is to investigate the boundary layer flow, heat and mass transfer towards the exponentially stretching sheet in a viscous fluid. Similarity transformations are used to convert non-linear governing equations of the flow into non-linear ordinary differential equations. The successive linearization method is used to linearize the...
Article
Full-text available
The problem dealing with the two-phase flow of particulate suspension in a converging diverging channel has been analyzed. The basic equations governing the flow are reduced to a set of ordinary differential equations by using the appropriate transformations for the velocity components. The numerical solutions are carried out using numerical techni...
Article
In this article, the effects of radiation and Joule heating on entropy generation due to laminar mixed convective flow of nanofluid in an annuli between two concentric cylinders is investigated. The governing equations are non-dimensionalized and solved by using HAM (homotopy analysis method). The effects of magnetic, Joule heating, Brinkman number...
Article
Full-text available
This article analyses the influence of double stratification and cross-diffusion effects on the viscous fluid flow over a porous sheet stretching exponentially by applying the velocity slip at the boundary. The numerical solutions to the governing equations are evaluated using successive linearisation procedure and the Chebyshev collocation method....
Article
In this article, the laminar mixed convective flow of an incompressible chemically reacting nanofluid in an annulus between two concentric cylinders is investigated by considering the Joule heating effect. The nonlinear governing equations are non-dimensionalized and then solved by using homotopy analysis method. The rate of entropy generation and...
Article
Full-text available
A mathematical model for blood flow through a bifurcated artery with mild stenosis in its parent artery is presented by taking blood as a copper suspended nanofluid with water as base fluid. The boundary of bifurcated artery is converted into a well-organized boundary using suitable transformations. The numerical solutions for temperature profiles,...
Article
The primary objective of the paper is to examine the nature of irreversibilities in the form of entropy generation for a micropolar fluid flow through a porous pipe which is inclined at an angle α. The governing nonlinear partial differential equations are changed to a system of ordinary differential equations by implementing the suitable transform...
Article
In this paper, entropy generation rate in the flow of couple stress fluid under- going exothermic chemical reaction through a porous vertical channel is studied by applying the second law of thermodynamics. A semi-analytical solution for the governing equations is obtained using Adomian decomposition method (ADM). The effects of couple stress pa- r...
Article
Full-text available
The slow steady rotation of an approximate sphere (whose shape deviates slightly from that of a sphere) in a concentric approximate spherical container is studied analytically. The slip boundary condition is applied at the particle and container surfaces. An exact solution is obtained to the first order in the small parameter characterizing the def...
Article
The objective of this paper is to examine the nature of irreversibilities in the form of entropy generation for a micropolar fluid flow through an inclined porous pipe with convective boundary conditions. The governing equations are non-dimensionlized and then linearized using a quasilinearization method. The resulting linearized equations are solv...
Article
Full-text available
This article analyzes the effects of Hall and ion-slip parameters on mixed convective electrically conducting nanofluid flow between two parallel concentric cylinders considering magnetic field. The governing equations are non dimensionalized. The resulting system of nonlinear ordinary differential equations is solved utilizing homotopy analysis me...
Article
Full-text available
The objective of the present study is to investigate the effect of nonlinear variation of density with temperature and concentration on the mixed convective flow of a micropolar fluid over an inclined flat plate in a non-Darcy porous medium in the presence of the convective boundary condition. In order to analyze all the essential features, the gov...
Article
Full-text available
The aim of the present paper is to study the influence of Hall current and Joule heating on flow, heat and mass transfer over an exponentially stretching sheet in a viscous fluid. Using similarity transformations the governing nonlinear coupled equations are converted into ordinary differential equations. These equations are linearized using the su...
Article
The entropy generation due to steady, incompressible micropolar fluid flow in a rectangular duct with slip and convective boundary conditions is calculated. An external uniform magnetic field is applied which is directed arbitrarily in a plane perpendicular to the flow direction. The governing partial differential equations of momentum, angular mom...
Article
Full-text available
In this article the laminar mixed convective incompressible electrically conducting flow of a nanofluid in vertical channel has been investigated by considering Hall and Ion-slip parameter effects. The nonlinear governing equations are non-dimensionalized and then solving by using HAM procedure. The impact of the magnetic, Hall and Ion-slip paramet...
Article
Full-text available
The aim of this article is to investigate the blood flow in bifurcated artery with mild stenosis taking blood as a micropolar fluid. The arteries forming bifurcation are taken to be symmetric and straight cylinders of finite length. The governing equations are non-dimensionalized, and coordinate transformation is used to convert the irregular bound...
Article
The problem of micropolar fluid past an impermeable cylinder and a sphere embedded in a fluid-saturated porous medium is studied separately using the Brinkman’s model, assuming a uniform flow far away from the sphere. Boundary conditions used on the surface of the body are no slip and no spin of microrotation. The stream function (the velocity) and...
Article
This paper investigates the effects of magnetohydrodynamic, double dispersion, and variable properties on mixed con-vection flow past a vertical surface in a power-law fluid saturated porous medium. The governing non-linear partial differential equations are reduced to a system of ordinary differential equations by using a scaling group of transfor...
Article
In this paper, the natural convection flow of incompressible electrically conducting nanofluid in a vertical channel is investigated. A magnetic field of uniform strength is applied perpendicular to the vertical channel. The magnetic Reynolds number is assumed very small so that the induced magnetic field effect is negligible. The injection/suction...
Article
The present study investigates the magnetic field effects of copper suspended nanoparticles in blood flow through a bifurcated artery with mild stenosis in its parent lumen. The artery configuring bifurcation is assumed to be symmetric about the axis of the artery and straight circular cylinders of limited length. The equations governing the flow a...
Article
Full-text available
The chemical reaction, Soret and Dufour effects on steady flow of a couple stress fluid between two rotating disks are studied. The lower disc is rotating with angular velocity Ω1 where as the upper disc is rotating with Ω2. The density variation in centrifugal and Coriolis force terms are taken into consideration by invoking a linear density-tempe...
Article
A numerical work has been performed to study the entropy generation of micropolar fluid flow and heat transfer in an annulus with porous walls under the transverse magnetic field associated with slip and convective boundary conditions. Assume that the injection velocity at one wall is same as the suction velocity at the other wall. The governing eq...
Article
Background and objectives: The objective of the present study is to investigate the magnetic field effect on pulsatile flow of blood through a bifurcated artery with mild stenosis in its parent lumen by taking blood as couple stress fluid. Methods: The equations governing the flow are made non-dimensional, and coordinate transformation is employ...
Article
This article presents the study of natural convection in a nanofluid along an inclined wavy surface embedded in a porous medium. A coordinate transformation is employed to transform the complex wavy surface to a smooth surface. The governing equations are transformed into a set of ordinary differential equations using the similarity transformation....
Article
Full-text available
This paper analyzes the laminar, incompressible natural convective transport inside vertical channel in an electrically conducting fluid saturated porous medium. In addition, this model incorporates the combined effects of Hall current, Soret and Joule heating. The non-linear governing equations with their corresponding boundary conditions are init...
Article
Full-text available
In the present paper, the pulsatile flow of blood through a bifurcated artery with mild stenosis in parent artery is investigated by taking blood as couple stress fluid. The arteries pattern of bifurcation is treated to be symmetric about the axis of the parent artery and straight circular cylinders of limited length. The governing equations are ma...
Article
In this article, the blood flow through a bifurcated artery with mild stenosis is investigated taking blood as couple stress fluid. The artery configuring bifurcation is assumed to be symmetric about the axis of the artery and straight cylinders of finite length. The governing equations are non-dimensionalized and coordinate transformation is used...
Article
In this article, the mixed convective flow of a micropolar fluid along a permeable vertical plate under the convective boundary condition is analyzed. The scaling group of transformations is applied to get the similarity representation of the system of partial differential equations of the problem and then the resulting equations are solved by usin...
Article
Numerical simulations for MHD pulsatile flow in a bifurcated artery with mild stenosis in parent lumen in the presence of externally applied magnetic field are performed to investigate the blood flow phenomena on both sides of the apex (flow divider). Blood is considered as an electrically conducting micropolar fluid. The arteries forming bifurcati...
Article
Full-text available
This paper investigates the influence of thermophoresis on mixed convection heat and mass transfer flow over a vertical wavy surface in a porous medium with variable properties, namely variable viscosity and variable thermal conductivity. The effect of wavy surface is incorporated into non-dimensional equations by using suitable transformations and...
Article
The problem of mixed convection along an inclined wavy surface embedded in a nanofluid saturated porous medium is considered. A coordinate transformation is employed to transform the complex wavy surface to a smooth surface. The governing equations are transformed into a set of partial differential equations using the non-similarity transformation...
Article
Full-text available
In this paper the entropy generation is studied due to micropolar fluid flow through an inclined channel of parallel plates with constant pressure gradient. The lower plate is maintained at constant temperature and upper plate at a constant heat flux. The governing equations are solved by applying the spectral quasilinearization method. The velocit...
Article
Full-text available
This paper analyzes the laminar, incompressible mixed convective transport inside vertical channel in an electrically conducting fluid saturated porous medium. In addition, this model incorporates the combined effects of Soret, Hall current and Joule heating. The nonlinear governing equations and their related boundary conditions are initially cast...
Article
The second law analysis is performed to study the micropolar fluid flow on entropy generation rate in an inclined circular pipe with uniform wall temperature. The governing nonlinear partial differential equations of momentum, microrotation and temperature are solved using Spectral Quasi linearization method. The velocity, microrotation and tempera...
Article
Full-text available
In this study, the entropy generation of micropolar fluid flow through concentric cylindrical annulus associated with slip and convective boundary conditions is performed numerically. The fluid flow in an annulus is due to the rotation of the outer cylinder with constant velocity. The analysis of such kind of fluid flow is governed by nonlinear par...
Article
Full-text available
The radiation and thermal diffusion effects on mixed convection flow of couple stress fluid through a channel are investigated. The governing non-linear partial differential equations are transformed into a system of ordinary differential equations using similarity transformations. The resulting equations are then solved using the Spectral Quasi-li...
Article
Full-text available
This paper analyzes the steady laminar magnetohydrodynamic (MHD) flow, heat and mass transfer characteristics in a nanofluid over a wedge in the presence of a variable magnetic field. The governing nonlinear partial differential equations are transformed into a system of ordinary differential equations using similarity variables and then solved num...