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S. Manjunatha

Bio: S. Manjunatha is an academic researcher from Christ University. The author has contributed to research in topics: Materials science & Nanofluid. The author has an hindex of 12, co-authored 39 publications receiving 480 citations. Previous affiliations of S. Manjunatha include Acharya Institute of Technology & Kuvempu University.

Papers published on a yearly basis

Papers
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Journal ArticleDOI
01 Apr 2019-Heliyon
TL;DR: The noteworthy finding is that the thermal conductivity is greater in hybrid nanofluid than that of a regular nan ofluid in the presence of specified factors.

78 citations

Journal ArticleDOI
TL;DR: In this paper, the authors study the problem of two-dimensional unsteady mixed convective flow a dusty fluid over a stretching sheet in the presence of thermal radiation and space-dependent heat source/sink.
Abstract: Purpose – The purpose of this paper is to study the problem of two‐dimensional unsteady mixed convective flow a dusty fluid over a stretching sheet in the presence of thermal radiation and space‐dependent heat source/sink.Design/methodology/approach – The equations governing the fluid flow and temperature fields for both the fluid and dust phases are reduced to coupled non‐linear ordinary differential equations by using a suitable set of similarity transformations. Numerical solutions of the resulting equations are obtained using the well known RKF45 method.Findings – The numerical results are benchmarked with previously published studies and found to be in excellent agreement. Finally, the effects of the pertinent parameters which are of physical and engineering interest on the flow and heat transfer characteristics are presented graphically and in tabulated form.Originality/value – The problem is relatively original as the dusty fluid works for this type of problem are lacking.

69 citations

Journal ArticleDOI
TL;DR: In this paper, the problem of magnetohydrodynamic flow and heat transfer of a viscous, incompressible and electrically conducting dusty fluid over an unsteady stretching sheet is analyzed numerically.

58 citations

Journal ArticleDOI
TL;DR: In this paper, a new theoretical tri-hybrid nanofluid model for enhancing the heat transfer is presented, which is formed by suspending three types of nanoparticles with different physical and chemical bonds into a base fluid.
Abstract: A new theoretical tri-hybrid nanofluid model for enhancing the heat transfer is presented in this article. This model explains the method to obtain a better heat conductor than the hybrid nanofluid. The tri-hybrid nanofluid is formed by suspending three types of nanoparticles with different physical and chemical bonds into a base fluid. In this study, the nanoparticles TiO2, Al2O3 and SiO2 are suspended into water thus forming the combination TiO2-SiO2-Al2O3-H2O. This combination helps in decomposing harmful substances, environmental purification and other appliances that requires cooling. The properties of tri-hybrid nanofluid such as Density, Viscosity, Thermal Conductivity, Electrical Conductivity and Specific Heat capacitance are defined mathematically in this article. The system of equations that governs the flow and temperature of the fluid are converted to ordinary differential equations and are solved using RKF-45 method. The results are discussed through graphs and it is observed that the tri-hybrid nanofluid has a better thermal conductivity than the hybrid nanofluid.

55 citations

Journal ArticleDOI
TL;DR: In this paper, a mathematical analysis of two-phase boundary layer flow and heat transfer of a Williamson fluid with fluid particle suspension over a stretching sheet has been carried out in the energy transfer process and the effect of influencing parameters on velocity and temperature transfer of fluid is examined and deliberated by plotted graphs and tabulated values.
Abstract: A mathematical analysis of two-phase boundary layer flow and heat transfer of a Williamson fluid with fluid particle suspension over a stretching sheet has been carried out in this paper. The region of temperature jump and nonlinear thermal radiation is considered in the energy transfer process. The principal equations of boundary layer flow and temperature transmission are reformed to a set of non-linear ordinary differential equations under suitable similarity transformations. The transfigured equalities are solved numerically with the help of RKF-45 order method. The effect of influencing parameters on velocity and temperature transfer of fluid is examined and deliberated by plotted graphs and tabulated values. Significances of the mass concentration of dust particle parameter play a key role in controlling flow and thermal behavior of non-Newtonian fluids. Further, the temperature and concern boundary layer girth are declines for increasing values of Williamson parameter.

54 citations


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Book ChapterDOI
01 Jan 1997
TL;DR: The boundary layer equations for plane, incompressible, and steady flow are described in this paper, where the boundary layer equation for plane incompressibility is defined in terms of boundary layers.
Abstract: The boundary layer equations for plane, incompressible, and steady flow are $$\matrix{ {u{{\partial u} \over {\partial x}} + v{{\partial u} \over {\partial y}} = - {1 \over \varrho }{{\partial p} \over {\partial x}} + v{{{\partial ^2}u} \over {\partial {y^2}}},} \cr {0 = {{\partial p} \over {\partial y}},} \cr {{{\partial u} \over {\partial x}} + {{\partial v} \over {\partial y}} = 0.} \cr }$$

2,598 citations

Journal ArticleDOI
TL;DR: In this article, the authors considered the Marangoni transport of dissipating SWCNT and MWCNT nanofluids under the influence of magnetic force and radiation, and derived numerical solutions of the arising nonlinear problem via Runge-Kutta based shooting approach.
Abstract: Present study addresses the Marangoni transport of dissipating SWCNT and MWCNT nanofluids under the influence of magnetic force and radiation. A novel exponential space dependent heat source is considered. The flow is generated due to a disk with surface tension created by thermal gradient. The partial differential equations system governing the flow of carbon-water nanoliquids and heat transfer through Marangoni convection is established. Subsequent system is reduced to nonlinear ordinary boundary value problem via generalized Karman transformations. Numerical solutions are developed of the arising nonlinear problem via Runge-Kutta based shooting approach. Impacts of embedded parameters are focused on Nusselt number , velocity and heat transport distributions through graphical illustrations. Our simulations figured out that the heat transfer rate increased via Marangoni convection; however it is decayed by applied magnetic force. The temperature of SWCNT-H 2O nanoliquid dominates MWCNT-H2O nanoliquid.

105 citations

Journal ArticleDOI
TL;DR: In this paper, the boundary layer flow and heat transfer of an incompressible TiO2-water nanoparticle on micropolar fluid with homogeneously suspended dust particles in the presence of thermal radiation are analyzed.

99 citations

Journal ArticleDOI
TL;DR: In this article, Williamson nanofluid over a stretching sheet is addressed, where momentum, heat, mass and entropy generation are modeled by second thermodynamics law and series solutions convergence by residual errors is ensured.

99 citations

Journal ArticleDOI
TL;DR: In this article, the authors examined the deposition of thermophoretic particles in the flow of hybrid nanofluid suspended by ferrite nanoparticles past an expansion/contraction moving disk with rotation.

97 citations