A Study on MHD Free-Convective Flow In Micro- Channels
A Study on MHD Free-Convective Flow In Micro- Channels.
INTRODUCTION
Microflow has been given great importance in recent research activities due to its new application in microfluidic system devices, such as biomedical sample injection, biochemical cell reaction, microelectronic ship cooling, etc.
A fundamental understanding of the flow and thermal fields as well as the corresponding characteristics at the microscale, which may deviate from those at the macroscale, is required for the technological demands.
Gaseous flow in microscale devices have been in the vanguard of research activities and have received a great deal of attention in recent years, due to the rapid growth of application in microtonal analysis systems and microelectromechanical systems (MEMS).
These applications have raised the interest in understanding the physical aspects of fluid flow and convective heat transfer in both forced and natural forms through micron sized channels, known as micro-channels.
A magnetohydrodynamic (MHD) flow, which is the simplest plasma model, has been the subject of a great number of empirical and theoretical investigations in many industrial fields.
MHD flows associating with heat transfer have received considerable attention due to the fact that their applications reside in many industrial fields such as electric propulsion for space exploration, crystal growth in liquids, cooling of nuclear reactors, electronic packages, microelectronic devices, etc.
The most common type of body force, which acts on fluid, is attributed to gravity so that the body force vector can be deduced from the gravitational acceleration. On the other hand, when an electrically conducting fluid is subjected to a magnetic field, the fluid motion
induces an electric current such that the fluid velocity is reduced on account of the interaction between the electric current and the fluid motion. Therefore, in case of free convection of an electrically conducting fluid in the presence of a magnetic field, there should be two body forces, i.e., a buoyancy force and a Lorentz force.
Aim and Objectives of the Study
The aim of this work is to study a fully developed natural convection flow of viscous, incompressible, electrically conducting fluid in a micro-channels formed by two vertical parallel plates under the effects of transverse magnetic field and suction/injection and this is achieved through the following objectives:
Investigate the influence of external applied transverse magnetic field on steady natural convection flow of conducting fluid in vertical parallel plate micro- channels, and
Investigate the combined influence of external applied transverse magnetic field and suction/injection on steady natural convection flow of conducting fluid in vertical parallel plate micro-channels
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