scholarly journals Dufour effect in a two immiscible fluid problem under chemical reaction with MHD

2020 ◽  
Author(s):  
A. Govindarajan ◽  
L. Sivakami ◽  
Stefano Bianchini
Keyword(s):  
Chemical Reaction ◽  
Immiscible Fluid ◽  
Dufour Effect

scholarly journals Unsteady MHD Free Convective Two Immiscible Fluid Flows in a Vertical Permeable Plate with Heat and Mass Transfer under Chemical Reaction and Heat Source

2018 ◽  
Vol 7 (4.10) ◽  
pp. 818
Author(s):  
Sivakami. L. ◽  
Govindarajan A. ◽  
E. P. Siva
Keyword(s):  
Mass Transfer ◽  
Heat Source ◽  
Heat And Mass Transfer ◽  
Chemical Reaction ◽  
Perturbation Technique ◽  
Fluid Flows ◽  
Immiscible Fluid ◽  
Suction Parameter ◽  
Permeable Plate ◽  
Dimensional Parameters

In this article , the nonlinear Unsteady MHD Free  convective Two Immiscible Fluid Flows in a vertical Permeable plate with Heat and Mass Transfer under chemical reaction and Heat source have been studied here. The conservation equations are solved analytically under the boundary conditions by using perturbation technique. The influence of various non dimensional parameters namely, Magnetic parameter, Prandtl number, chemical reaction,, Thermal radiation parameter and Schmidt number are examined on the velocity, Temperature, Concentration fields in detail. It is noted that  the velocity is decreased with increasing Heat source under chemical reaction parameter. But increasing suction parameter decreases the velocity 

scholarly journals MHD Free Convection from a Semi-infinite Vertical Porous Plate with Diffusion-Thermo Effect

2021 ◽  
Vol 12 (6) ◽  
pp. 7685-7696
Keyword(s):  
Mass Transfer ◽  
Chemical Reaction ◽  
Perturbation Technique ◽  
Porous Plate ◽  
Physical Parameters ◽  
Regular Perturbation ◽  
Dufour Effect ◽  
Vertical Porous Plate ◽  
Fluid Concentration ◽  
First Order Chemical Reaction

An analytical solution for two-dimensional unsteady MHD free convective mass transfer flows of viscous incompressible optically thin fluid past a semi-infinite vertical porous plate in the presence of thermal radiation and chemical reaction is presented in this paper. A uniform magnetic field is applied normally to the plate with a first-order chemical reaction. The non-dimensional governing equations are solved analytically by using the regular perturbation technique. The effects of various physical parameters like radiation parameter Q, Dufour effect Du, chemical reaction parameter K, thermal Grashof number Gr, Hartmann number M, porosity parameter k, etc., are studied and demonstrated graphically. One of the significant findings of this analysis includes that an intensification of the chemical reaction effect causes a downfall in the fluid concentration. In contrast, another important outcome of the present study is that the rate of heat transfer and shear stress at the wall increases under the diffusion thermo effect or Dufour effect. Still, it tends to fall for high radiation. Further, the rate of mass transfer rises under the chemical reaction effect.

scholarly journals The Unsteady Free Convective Flow over Rotating Disk under the Existence of Chemical Reaction, Soret and Dufour Effects

2020 ◽  
Vol 9 (4) ◽  
pp. 1836-1841
Keyword(s):  
Differential Equations ◽  
Chemical Reaction ◽  
Convective Flow ◽  
Soret Effect ◽  
Rotating Disk ◽  
Free Convective Flow ◽  
Soret And Dufour Effects ◽  
Dufour Effect ◽  
Flow Parameters ◽  
Flow Through

In this article, the unsteady free convective flow through a rotating disk was discussed under the influence of the chemical reaction, Dufour effect and Soret effect. Similarity transformation is used to change the unsteady non-linear boundary equations to a set of ordinary differential equations. Then we used the MATLAB’s bvp4c solver to solve these differential equations. Temperature as well as concentration profiles are drawn for different flow parameters of flow such as Soret Effect, Dufour Effect and also parameter of Chemical Reaction. We have also discussed the Nusselt number graph and values are given in a tabular form for different kinds of flow parameters.

scholarly journals BUOYANCY AND CHEMICAL REACTION EFFECTS ON MHD FREE CONVECTIVE SLIP FLOW OF NEWTONIAN AND POLAR FLUID THROUGH POROUSMEDIUM IN THE PRESENCE OF THERMAL RADIATION AND OHMIC HEATING WITH DUFOUR EFFECT

2018 ◽  
Vol 33 (1) ◽  
pp. 001
Author(s):  
Komal Choudhary ◽  
Abhay Kumar Jha ◽  
Lakshmi Narayan Mishra ◽  
Ms. Vandana
Keyword(s):  
Thermal Radiation ◽  
Chemical Reaction ◽  
Ohmic Heating ◽  
Slip Flow ◽  
Skin Friction Coefficient ◽  
Electrically Conductive ◽  
Polar Fluid ◽  
Dufour Effect ◽  
Infinite Vertical Plate ◽  
Analytical Perturbation

The present paper investigates the effects of thermal radiation, joule heating on an unsteady hydro magnetic free convective flow of a viscous electrically conductive Newtonian and polar fluid past a semi-infinite vertical plate embedded in a porous media in the presence of heat absorption, chemical reaction, slip flow and Dufour effect. Analytical perturbation solutions are obtained for the velocity, temperature and concentration fields as well as for the skin friction coefficient, Nusselt number and Sharewood number. The results are presented in graphical forms to study the effects of various parameters.

Directional observation on lipid of male nectary of Lindera megaphylla hemsl. by the rapid embedding method with polyethylene glycol (PEG)

1990 ◽  
Vol 48 (3) ◽  
pp. 718-719
Author(s):  
Dai Dalin ◽  
Guo Jianmin
Keyword(s):  
Electron Microscope ◽  
Polyethylene Glycol ◽  
Chemical Reaction ◽  
Traditional Method ◽  
Osmium Tetroxide ◽  
Unsaturated Lipid ◽  
Embedding Method ◽  
Long Period ◽  
New Methods

Lipid cytochemistry has not yet advanced far at the EM level. A major problem has been the loss of lipid during dehydration and embedding. Although the adoption of glutaraldehyde and osmium tetroxide accelerate the chemical reaction of lipid and osmium tetroxide can react on the double bouds of unsaturated lipid to from the osmium black, osmium tetroxide can be reduced in saturated lipid and subsequently some of unsaturated lipid are lost during dehydration. In order to reduce the loss of lipid by traditional method, some researchers adopted a few new methods, such as the change of embedding procedure and the adoption of new embedding media, to solve the problem. In a sense, these new methods are effective. They, however, usually require a long period of preparation. In this paper, we do research on the fiora nectary strucure of lauraceae by the rapid-embedding method wwith PEG under electron microscope and attempt to find a better method to solve the problem mentioned above.

Sign in / Sign up

Export Citation Format

Share Document