125 research outputs found
Natural Convection Flow of a Two-Phase Dusty Non-Newtonian Fluid Along a Vertical Surface
The aim of this paper is to present a boundary-layer analysis of two-phase
dusty non-Newtonian fluid flow along a vertical surface by using a modified power-law viscosity
model. This investigation particularly reports the flow behavior of spherical particles
suspended in the non-Newtonian fluid. The governing equations are transformed into nonconserved
form and then solved straightforwardly by implicit finite difference method. The
numerical results of rate of heat transfer, rate of shear stress, velocity and temperature
profiles and streamlines and isotherms are presented for wide range of Prandtl number, i.e,
(0:7 †Pr †1000:0), with the representative values of the power-law index n. A good
agreement is found between the present and the previous results when compared with some
special cases. The key observation from the present study is that the power-law fluids with
(n > 1) are more likely to promote the rate of heat transfer near the leading edge
Thermal Maragoni Convection of Two-phase Dusty Fluid Flow Along a Vertical Wavy Surface
The paper considers the inuence of thermal Maragoni convection on boundary layer flow of two-phase dusty fluid along a vertical wavy surface. The dimensionless boundary layer equations for two-phase problem are reduced to a convenient form by primitive variable transformation (PVF) and then integrated numerically by employing the implicit finite difference method along with the Thomas Algorithm. The effect of thermal Maragoni convection, dusty water and sinusoidal waveform are discussed in detail in terms of local heat transfer rate, skin friction coefficient, velocity and temperature distributions. This investigation reveals the fact that the water-particle mixture reduces the rate of heat transfer, significantly
Numerical estimation of thermal radiation effects on Marangoni Convection of dusty fluid
In this paper, numerical solutions to thermally radiating Marangoni convection of dusty fluid flow along a vertical wavy surface are established. The results are obtained with the understanding that the dust particles are of uniform size and dispersed in optically thick fluid. The numerical solutions of the dimensionless transformed equations are obtained through straightforward implicit finite difference scheme. In order to analyze the influence of various controlling parameters, results are displayed in the form of rate of heat transfer, skin friction coeffcient, velocity and temperature profiles, streamlines and isotherms. It is observed that the variation in thermal radiation parameter significantly alters the corresponding particle pattern and extensively promotes the heat transfer rate
Two-phase Natural Convection Dusty Nanofluid Flow
An analysis is performed to study the two-phase natural convection flow of nano fluid along a
vertical wavy surface. The model includes equations expressing conservation of total mass,
momentum and thermal energy for two-phase nano fluid. Primitive variable formulations
(PVF) are used to transform the dimensionless boundary layer equations into a convenient
coordinate system and the resulting equations are integrated numerically via implicit finite difference iterative scheme. The effect of controlling parameters on the dimensionless quantities such as skin friction coefficient, rate of heat transfer and rate of mass transfer is
explored. It is concluded from the present analysis, that the diffusivity ratio parameter, N_A and particle-density increment number, N_B have pronounced influence on the reduction of heat transfer rate
Numerical Solutions for Gyrotactic Bioconvection of Dusty Nanofluid along a Vertical Isothermal Surface
The aim of present paper is to establish the detailed numerical results for bioconvection
boundary-layer flow of two-phase dusty nanofluid. The dusty fluid contains gyrotactic microorganisms
along an isothermally heated vertical wall. The physical mechanisms responsible
for the slip velocity between the dusty fluid and nanoparticles, such as thermophoresis
and Brownian motion, are included in this study. The influence of the dusty nanofluid on
heat transfer and flow characteristics are investigated in this paper. The governing equations
for two-phase model are non-dimensionalized and then solved numerically via twopoint
finite difference method together with the tri-diagonal solver. Results are presented
graphically for wall skin friction coefficient, rate of heat transfer, velocity and temperature
profiles and streamlines and isotherms. To ensure the accuracy, the computational results
are compared with available data and are found in good agreement. The key observation
from present analysis is that the mass concentration parameter, D_Ï, extensively promotes
the rate of heat transfer, Q_w, whereas, the wall skin friction coefficient, Ï_w, is reduced by
loading the dust parameters in water based dusty nanofluid
Two-phase Dusty Fluid Flow Along a Rotating Axi-symmetric Round-Nosed Body
This article is concerned with the class of solutions of gas boundary layer containing
uniform, spherical solid particles over the surface of rotating axi-symmetric roundnosed
body. By using the method of transformed coordinates, the boundary-layer equations
for two-phase flow are mapped into a regular and stationary computational domain and then
solved numerically by using implicit finite difference method. In this study, a rotating hemisphere
is used as a particular example to elucidate the heat transfer mechanism near the
surfaces of round nosed bodies. We will also investigate whether the presence of dust particles
in carrier fluid disturb the flow characteristics associated with rotating hemisphere or
not. A comprehensive parametric analysis is presented to show the influence of the particle
loading, the buoyancy ratio parameter and the surface of rotating hemisphere on the
numerical findings. In the absence of dust particles, the results are graphically compared
with existing data in the open literature and an excellent agreement has been found. It is
noted that, the concentration of dust particles parameter, D_p, strongly influence the heat
transport rate near the leading edge
Thermal Radiation and Viscous Dissipation Effects on an Oscillatory Heat and Mass Transfer Flow of a Viscoelastic Fluid with Ohmic Heating
An anticipated outcome that is intended chapter is to investigate effects of magnetic field on an oscillatory flow of a viscoelastic fluid with thermal radiation, viscous dissipation with Ohmic heating which bounded by a vertical plane surface, have been studied. Analytical solutions for the quasi â linear hyperbolic partial differential equations are obtained by perturbation technique. Solutions for velocity and temperature distributions are discussed for various values of physical parameters involving in the problem. The effects of cooling and heating of a viscoelastic fluid compared to the Newtonian fluid have been discussed
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