The steady laminar planar mixing layer flow of viscoelastic FENE-P fluids

AbstractIn the study, the steady, laminar, incompressible, convective flow of a viscous fluid over a moving plate is investigated theoretically by adopting different types of nanoparticles. Radiation, internal heat generation and viscous dissipation effects are considered in the energy modeled equation. The governing flow equations for the momentum and temperature are reduced to dimensionless form via similarity transformations. The solutions to the resultant equations alongside with the transformed boundary conditions are numerically obtained using MATLAB package bvp4c. Validation with earlier studies are done for the non-internal heat generation case for two distinct nanoparticles of type Cu-water and Al-water. Extensive visualization of flow rate and heat distributions for various emerging parameters are examined. Temperature is consistently enhanced with a rising Eckert number of both types of nanofluids, whereas it is strongly reduced with rising values of radiation term. Heat transfer coefficient is consistently increased with a nanoparticle volume fraction of high convective heat in the medium.

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The plane mixing layer flow visualization results and three dimensional effects

The Role of Coherent Structures in Modelling Turbulence and Mixing - Lecture Notes in Physics ◽

10.1007/3-540-10289-2_27 ◽

2007 ◽

pp. 208-217 ◽

Cited By ~ 17

Author(s):

A Roshko

Keyword(s):

Flow Visualization ◽

Mixing Layer ◽

Three Dimensional ◽

Plane Mixing Layer ◽

Dimensional Effects ◽

Layer Flow

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Boundary layer flow of a nanofluid past a horizontal flat plate in a Darcy porous medium: A Lie group approach

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406219896594 ◽

2019 ◽

Vol 234 (8) ◽

pp. 1545-1553 ◽

Cited By ~ 3

Author(s):

M Ferdows ◽

Hossam A Nabwey ◽

AM Rashad ◽

MJ Uddin ◽

Faris Alzahrani

Keyword(s):

Porous Medium ◽

Volume Fraction ◽

Dimensionless Temperature ◽

Continuous Group ◽

Convective Boundary ◽

Similarity Transformations ◽

New Findings ◽

Layer Flow ◽

Fifth Order ◽

Steady Laminar

This research paper addresses the two-dimensional steady laminar incompressible free convective flow of a nanofluid past a horizontal plate saturated in the porous medium, where both the thermal and the mass convective boundary conditions are taken into consideration. Mathematical modeling via similarity transformations (which was developed using one-parameter continuous group of transformation) was applied to obtain a reduced mathematical model, which describes the problem. The solutions of the reduced system were obtained by a numerical method called the fourth- and fifth-order Runge–Kutta–Fehlberg method with the aid of computational software called Maple version 13. The resulting distributions of dimensionless temperature, velocity, and nanoparticle volume fraction are studied graphically to demonstrate the effect of pertinent parameters. Moreover, some of the new findings are shown in graphs. An excellent agreement was found after comparing the results with the previous literature, which assures the validity of the analysis. It is found that the flow is accelerated with an increase in thermal and mass convective parameters. Temperature and concentration are enhanced for rising values of (thermal and concentration) conjugate parameters.

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Mixing layer produced by a screen and its dependence on initial conditions

Journal of Fluid Mechanics ◽

10.1017/s0022112084001075 ◽

1984 ◽

Vol 142 ◽

pp. 217-231 ◽

Cited By ~ 14

Author(s):

Hakuro Oguchi ◽

Osamu Inoue

Keyword(s):

Large Scale ◽

Initial Conditions ◽

Mixing Layer ◽

Mixing Layers ◽

Laser Doppler Velocimeter ◽

Small Scale ◽

Wire Screen ◽

Flow Features ◽

Wire Method ◽

Layer Flow

This paper aims to elucidate the structure of the turbulent mixing layers, especially, its dependence on initial disturbances. The mixing layers are produced by setting a woven-wire screen perpendicular to the freestream in the test section of a wind tunnel to obstruct part of the flow. Three kinds of model geometry are treated; these model screens produced mixing layers which may be regarded as the equivalents of the plane mixing layer and of two-dimensional and axisymmetric wakes issuing into ambient streams of higher velocity. The initial disturbances are imposed by installing thin rods of various sizes along the edge of the screen or at the origin of the mixing layer. Flow features are visualized by the smoke-wire method. Statistical quantities are measured by a laser-Doppler velocimeter. In all cases large-scale transverse vortices seem to persist, although comparatively small-scale vortices are superimposed on the flow field in the mixing layer. The mixing layers are in self-preserving state at least up to third-order moments, but the self-preserving state is different in each case. The growth rates of the mixing layer are shown to depend strongly on the initial disturbance imposed.

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