Annamacharya Institute of Technology and science Rajampet Autonomous

Rājampet, India

Annamacharya Institute of Technology and science Rajampet Autonomous

Rājampet, India
SEARCH FILTERS
Time filter
Source Type

Reddy L.R.,Mekapati Rajamohan Reddy Institute of Technology and Science | Raju M.C.,Annamacharya Institute of Technology and science Rajampet Autonomous | Raju G.S.S.,Jawaharlal Nehru Technological University Anantapur | Reddy N.A.,Annamacharya Institute of Technology and science Rajampet Autonomous
Frontiers in Heat and Mass Transfer | Year: 2016

This investigation presents an analytical study on magnetohydrodynamic (MHD), convective flow of a viscoelastic, incompressible, radiative, chemically reactive, electrically conducting and rotating fluid through a porous medium filled in a vertical channel in the presence of thermal diffusion. A magnetic field of uniform strength is applied along the axis of rotation. The fluid is assumed to act on with a periodic time variation of the pressure gradient in upward direction vertically. One of the plates is maintained at non-uniform temperature and the temperature difference of the walls of the channel is assumed high enough that induces heat transfer due to thermal radiation. The analytical solutions are obtained for velocity, temperature and concentration, by solving the dimensionless governing equations using regular perturbation technique. To assess the effects of various parameters involved in the model, two cases of small and large rotations have been considered. Effects of various parameters involved in velocity, temperature, species concentration distributions and the corresponding amplitude and the phase angle of the skin friction, Nusselt number and Sherwood number are shown graphically and discussed in detail. © 2016, Global Digital Central. All Rights Reserved.


Veeresh C.,Sri Venkateswara University | Varma S.V.K.,Sri Venkateswara University | Raju M.C.,Annamacharya Institute of Technology and science Rajampet Autonomous | Rushi Kumar B.,Vellore Institute of Technology
Special Topics and Reviews in Porous Media | Year: 2016

A mathematical model is presented to analyze the unsteady boundary layer slip flow with Soret effect and chemical reaction over a permeable vertical plate. The dimensionless governing equations are solved analytically by using the perturbation technique. The effects of various flow parameters of the velocity, temperature, and concentration fields are presented graphically and discussed in detail. The results obtained show that the velocity, temperature, and concentration are appreciably influenced by the presence of thermal diffusion, chemical reaction, thermal radiation, and magnetic field. Also, the effects of various parameters on the skin friction coefficient, rate of heat transfer, and the rate of mass transfer at the surface are discussed. It is observed that (i) Velocity increases with an increase in Grashof number, solutal Grashof number, and porosity parameter, but it shows the reverse effect in the cases of radiation parameter, magnetic parameter, chemical reaction parameter, and Schmidt number; (ii) Temperature distribution decreases with an increase in Prandtl number, radiation parameter, and heat source parameter; and (iii) Concentration distribution decreases with an increase in Schmidt number, chemical reaction parameter, and Soret number. © 2016 by Begell House, Inc.


Reddy S.H.,Annamacharya Institute of Technology and science Rajampet Autonomous | Raju M.C.,Annamacharya Institute of Technology and science Rajampet Autonomous | Reddy E.K.,JNTUH College of Engineering
Frontiers in Heat and Mass Transfer | Year: 2016

This manuscript presents a detailed numerical study on the influence of radiation absorption and chemical reaction on unsteady magneto hydrodynamic free convective heat and mass transfer flow. A heat generating Casson fluid past an oscillating vertical plate embedded in a porous medium in the presence of constant wall temperature and concentration is considered. The non-dimensional governing equations along with the corresponding boundary conditions are solved using Finite difference method numerically. Effects of various emerging flow parameters on concentration, temperature and velocity distributions are presented graphically and analyzed. Expressions for skin-friction, Nusselt number and Sherwood number are also obtained. Effects of radiation absorption and homogeneous chemical reaction are considered here. It is interesting to note that, the presence of the chemical reaction reduces the velocity of the Casson fluid whereas it has different impact in the presence of radiation absorption. Also increasing values of chemical reaction parameter leads to decrease the concentration of the Casson fluid. © 2016, Global Digital Central. All rights reserved.


Raju M.C.,Annamacharya Institute of Technology and science Rajampet Autonomous | Ananda Reddy N.,Annamacharya Institute of Technology and science Rajampet Autonomous | Varma S.V.K.,Sri Venkateswara University
Ain Shams Engineering Journal | Year: 2014

An analytical solution of MHD free convective, dissipative boundary layer flow past a vertical porous surface in the presence of thermal radiation, chemical reaction and constant suction, under the influence of uniform magnetic field which is applied normal to the surface is studied. The governing equations are solved analytically using a regular perturbation technique. The expressions for velocity, temperature and concentration fields are obtained. With the aid of these, the expressions for the coefficient of skin friction, the rate of heat transfer in the form of Nusselt number and the rate of mass transfer in the form of Sherwood number are derived. Finally the effects of various physical parameters of the flow quantities are studied with the help of graphs and tables. It is observed that the velocity and concentration increase during a generative reaction and decrease in a destructive reaction. The same observed to be true for the behavior of the fluid temperature. The presence of magnetic field and radiation diminishes the velocity and also the temperature. © 2014 Production and hosting by Elsevier B.V.


Reddy T.S.,Shree Rama Educational Society Group of institutions Integrated campus | Raju M.C.,Annamacharya Institute of Technology and science Rajampet Autonomous | Varma S.V.K.,Sri Venkateswara University
Journal of Applied Fluid Mechanics | Year: 2013

We have investigated an unsteady flow of a viscous, incompressible electrically conducting, laminar free convection boundary layer flow of a moving infinite vertical plate in a radiative and chemically reactive medium in the presence of a transverse magnetic field. The equations governing the flow are solved by Laplace transform technique. The expressions for velocity, temperature, concentration are derived and based on these quantities the expressions for skin friction; rate of heat transfer and the rate mass transfer near the plate are derived. The effects of various physical parameters on flow quantities, wise magnetic parameter, Grashof number, modified Grashof number, heat source parameter, the chemical reaction parameter, Schmidt number and radiation parameter are studied numerically and the results are discussed with the help of graphs. Some important applications of physical interest for different type motion of the plate like case (i) when the plate is moving with uniform velocity, case (ii) when the plate is moving with single acceleration and case (iii) when the plate is moving with periodic acceleration, are discussed.


Umamaheswar M.,Annamacharya Institute of Technology and science Rajampet Autonomous | Raju M.C.,Annamacharya Institute of Technology and science Rajampet Autonomous | Varma S.V.K.,Andhra University
Frontiers in Heat and Mass Transfer | Year: 2015

An investigation is carried out to analyze the unsteady MHD free convection, heat and mass transfer flow of a Newtonian fluid past an infinite vertical porous plate with homogeneous chemical reaction and heat absorption/generation. A uniform magnetic field is applied perpendicular to the plate. The non-dimensional governing equations are solved numerically by using finite difference method. The effects of various parameters governing the flow on velocity, temperature, concentration, skin friction, Nusselt number and Sherwood number are studied through graphs. It is noticed that velocity decreases with an increase in Magnetic field while it increases with an increase in Grashof number, modified Grashof number & Permeability parameter. Temperature increases with an increase in heat absorption and it shows reverse effect in the case of heat generation and Prandtl number. Concentration decreases with increase in Schmidt number and chemical reaction parameter. © 2015, Global Digital Central. All rights reserved.

Loading Annamacharya Institute of Technology and science Rajampet Autonomous collaborators
Loading Annamacharya Institute of Technology and science Rajampet Autonomous collaborators