Magnetic field effect on fluid flow characteristics in a pipe for laminar flow |
| |
Authors: | Asadolah Malekzadeh Amir Heydarinasab Bahram Dabir |
| |
Affiliation: | (1) Mechanical Engineering Department, JUST, P.O. Box 3030, Irbid, 22110, Jordan |
| |
Abstract: | The influence of a magnetic field on the skin friction factor of steady fully-developed laminar flow through a pipe was studied
experimentally. A mathematical model was introduced and a finite difference scheme used to solve the governing equations in
terms of vorticity-stream function. The model predictions agree favourably with experimental results. It is observed that
the pressure drop varies in proportion to the square of the product of the magnetic field and the sine of the magnetic field
angle. Also, the pressure drop is proportional to the flow rate. This situation is similar to what applies in the absence
of a magnetic field. It is found that a transverse magnetic field changes the axial velocity profile from the parabolic to
a relatively flat shape. At first, the radial velocity rises more rapidly and then gradually decreases along the pipe until
falling to zero. A numerical correlation can be written for the considerable distance required for the new axial velocity
profile to establish. Owing to the changes taking place in the axial velocity profile, it exhibits a higher skin friction
factor. The new axial velocity profile asymptotically approaches its limit as the Hartmann number becomes large. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|