The mass transfer of a rising bubble in creeping flow regime is numerically investigated. A reversible oxidation-reduction reaction taken into account. Two coupled equations are needed to study the oxygen and reduced species transport. Three dimensionless numbers involved: Péclet Damköhler ratio diffusion coefficient oxygen. Numerical computations applied soda-lime-silica borosilicate glass-for...

The aim of this investigation is to study the effect of hall current on an unsteady natural convective flow of a viscous, incompressible, electrically conducting optically thick radiating fluid past a vertical porous plate in the presence of a uniform transverse magnetic field. The Rosseland diffusion approximation is used to describe the radiative heat flux in the energy equation. Analytical a...

A numerical solution for the free convective, unsteady, laminar convective heat and mass transfer in a viscoelastic fluid along a semi-infinite vertical plate is presented. The Walters-B liquid model is employed to simulate medical creams and other rheological liquids encountered in biotechnology and chemical engineering. This rheological model introduces supplementary terms into the momentum c...

Numerous researches have been investigated on the mass transfer phenomena and hydrodynamics for the fluid in the vicinity of the membrane surface by the mathematical modelling and simulation. Due to complexities involved in solving transport phenomena within membranes, the application of CFD simulation study for determining the concentration polarization (CP) profile in the membrane channel is ...

The effect of hyaluronidase on host connective tissue and the protective action of the hyaluronic acid capsule against phagocytosis have been the basis for a number of studies on the relation of these products to the virulence of streptococci. Duran-Reynals (1933) demonstrated that the areas of dermal lesions produced by several strains of streptococci were largely a function of the amount of h...

We investigate entropy generation in unsteady three-dimensional axisymmetric MHD nanofluid flow over a non-linearly stretching sheet. The flow is subject to thermal radiation and a chemical reaction. The conservation equations were solved using the spectral quasi-linearization method. The novelty of the work is in the study of entropy generation in three-dimensional axisymmetric MHD nanofluid a...

This paper describes the heat and mass transfer in a square microchannel that is heated from one side. This microchannel represents a reaction channel in a microreactor that is used to study the kinetics of the catalytic partial oxidation of methane. The microchannel is contained in a silicon wafer and is covered by a thin silicon sheet. At the top side of this sheet, heating elements are prese...

This paper deals with the double-diffusive boundary layer flow of non-Newtonian nano-fluid over a stretching sheet. In this model, where binary nano-fluid is used, the Brownian motion and thermophoresis are classified as the main mechanisms which are responsible for the enhancement ofthe convection features of the nanofluid. By means of the successive approximation method the governing equation...

Boundary Layer Flow past a stretching surface with constant wall temperature, of a nanofluid is studied for heat transfer characteristics. The system of partial differential equations describing such a flow is subjected to similarity transformations gives rise to a boundary value problem involving a system of ordinary differential equations. This system is solved by a shooting method. Effect of...

This paper investigates the influence of suction on flow, heat and mass transfer characteristics over a permeable shrinking sheet immersed in doubly stratified micropolar fluid. The model which consists partial differential equations is converted into set nonlinear using similarity transformations then solved bvp4c solver. Numerical results obtained are presented graphically for distributions v...