In this paper we study the link between ‘turbulence strength’ in a flow and the leading Lyaponuv exponent that characterize it. To this end we use two approaches. The first, analytical, considers the truncated convection equations in 2-dimensions with three (Lorenz model) and six components and study their leading Lyaponuv exponent as a function of the Rayleigh number. For the second approach w...

Linear stability analysis of a combined convective flow in an annulus is performed the paper. The base generated by two factors: (a) different constant wall temperatures and (b) heat release as result chemical reaction that takes place fluid. nonlinear boundary value problem for distribution temperature analyzed using bifurcation analysis. linear solved numerically collocation method. Two separ...

The hydrothermal characteristics of (Ag+TiO2+H2O) hybrid nanofluid three dimensional flow between two vertical plates, in which the right permeable plate stretches as well rotates, are investigated by employing varying magnetic, heat and radiation fluxes. motion is governed coupled PDEs (nonlinear) obeying suitable boundary conditions. system transformed to a set nonlinear ODEs appropriate simi...

This paper investigates unsteady two-dimensional MHD flow past a rotating semi-infinite plate with an inclined magnetic field viscous dissipation, Ohmic and Joule heating. The fluid is assumed to be electrically conducting. governing non-linear partial differential equations for mass, momentum, energy, concentration are transformed into couple system by using appropriate dimensionless parameter...

the present paper investigates turbulent mixed convection - radiation flow between two vertical parallel plates kept at different temperatures with variable thermophysical properties. the reynolds number, based on channel half-width and friction velocity and the grashof number, based on channel width and wall temperature difference, were assumed to be 150 and 1.6×106, respectively. numerical si...

The practicability of using Artificial Neural Network (ANN) to predict the thermal behaviour due mixed convection is established. Numerical simulations are conducted first for a laminar problem in lid-driven square cavity with two internal rectangular blocks, oriented vertically or horizontally. CFD results used training and testing ANN new cases; thus, saving effort computation time validate o...

Abstract The impacts of MHD and heat generation/absorption on lid‐driven convective fluid flow occasioned by a square enclosure housing an elliptic cylinder have been investigated numerically. the horizontal boundaries were insulated left vertical wall was experienced at fixed hot temperature, right exposed to cold temperature. COMSOL Multiphysics 5.6 software used resolve nondimensional equati...

This paper pertains to investigate the heat transfer characteristics of two dimensional two phase flow in a porous medium over a stretching sheet with internal heat generation. The novelty of the present study is to consider the permeability parameter, space and temperature dependent internal heat generation along with various parameters like Froud number ,heat source/sink parameter, Grashof nu...

Radiation effects on free convection MHD Couette flow of a viscous incompressible heat generating fluid confined between vertical plates have been studied. The governing equations are solved analytically using the Laplace transform technique. The variations of velocity and fluid temperature are presented graphically. It is observed that the velocity decreases with an increase in either magnetic...

The study of unsteady hydrodynamic free convective flow of a viscous incompressible fluid past a vertical porous plate in the presence of a variable suction has been made. Approximate solutions have been derived for the velocity and temperature fields, shear stress, and rate of heat transfer using perturbation technique. It is observed that main fluid velocity decreases with increase in Prandtl...