scholarly journals Stability of a current-carrying fluid with a free surface in a transverse magnetic field

1974 ◽  
Vol 17 (6) ◽  
pp. 1177
Author(s):  
Chung-Yi Wang
Keyword(s):  
Magnetic Field ◽  
Free Surface ◽  
Transverse Magnetic Field ◽  
Transverse Magnetic ◽  
A Current

scholarly journals The effect of uniform magnetic field on spatial-temporal evolution of thermocapillary convection with the silicon oil based ferrofluid

2020 ◽  
Vol 24 (6 Part B) ◽  
pp. 4159-4171
Author(s):  
Shuo Yang ◽  
Rui Ma ◽  
Qiaosheng Deng ◽  
Guofeng Wang ◽  
Yu Gao ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Free Surface ◽  
Transverse Magnetic Field ◽  
Liquid Bridge ◽  
Thermocapillary Convection ◽  
Surface Deformation ◽  
Axial Magnetic Field ◽  
Transverse Magnetic ◽  
Surface Flow ◽  
Silicon Oil

A uniform axial or transverse magnetic field is applied on the silicon oil based ferrofluid of high Prandtl number fluid (Pr ? 111.67), and the effect of magnetic field on the thermocapillary convection is investigated. It is shown that the location of vortex core of thermocapillary convection is mainly near the free surface of liquid bridge due to the inhibition of the axial magnetic field. A velocity stagnation region is formed inside the liquid bridge under the axial magnetic field (B = 0.3-0.5 T). The disturbance of bulk reflux and surface flow is suppressed by the increasing axial magnetic field. There is a dynamic response of free surface deformation to the axial magnetic field, and then the contact angle variation of the free surface at the hot corner is as following, ?hot, B = 0.5 T = 83.34? > ?hot, B = 0.3 T = 72.16? > > ?hot,B = 0.1 T = 54.21? > ?hot, B = 0 T = 43.33?. The results show that temperature distribution near the free surface is less and less affected by thermocapillary convection with the increasing magnetic field, and it presents a characteristic of heat-conduction. In addition, the transverse magnetic field does not realize the fundamental inhibition for thermocapillary convection, but it transfers the influence of thermocapillary convection to the free surface.

Hydrothermal wave instability of thermocapillary-driven convection in a transverse magnetic field

2000 ◽  
Vol 404 ◽  
pp. 211-250 ◽  
Author(s):  
JĀNIS PRIEDE ◽  
GUNTER GERBETH
Keyword(s):  
Magnetic Field ◽  
Free Surface ◽  
Field Strength ◽  
Transverse Magnetic Field ◽  
Transverse Magnetic ◽  
Base Flow ◽  
Critical Parameters ◽  
Instability Modes ◽  
Small Parameters ◽  
Prandtl Numbers

We study the linear stability of thermocapillary-driven convection in a planar unbounded layer of an electrically conducting low-Prandtl-number liquid heated from the side and subjected to a transverse magnetic field. The thresholds of convective instability for both longitudinal and oblique disturbances are calculated numerically and also asymptotically by considering the Hartmann and Prandtl numbers as large and small parameters, respectively. The magnetic field has a stabilizing effect on the flow with the critical temperature gradient for the transition from steady to oscillatory convection increasing as square of the field strength, as also does the critical frequency, while the critical wavelength reduces inversely with field strength. These asymptotics develop in a strong enough magnetic field when the instability is entirely due to the jet of the base flow confined in the Hartmann layer at the free surface. In contrast to the base flow, the critical disturbances, having a long wavelength at small Prandtl numbers, extend from the free surface into the bulk of the liquid layer over a distance exceeding the thickness of the Hartmann layer by a factor O(Pr−1/2). For Ha [lsim ] Pr−1/2 the instability is influenced by the actual depth of the layer. For such moderate magnetic fields the instability threshold is sensitive to the thermal properties of the bottom of the layer and the dependences of the critical parameters on the field strength are more complicated. In the latter case, various instability modes are possible depending on the thermal boundary conditions and the relative magnitudes of Prandtl and Hartmann numbers.

Vortex pinning in an irradiated Bi-2212 single crystal: What about the screening of the transverse magnetic field?

2004 ◽  
Vol 114 ◽  
pp. 371-372 ◽  
Author(s):  
A. Ruyter ◽  
D. Plessis ◽  
P. Topart ◽  
J. Plain ◽  
C. Simon ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Crystal ◽  
Transverse Magnetic Field ◽  
Transverse Magnetic ◽  
Vortex Pinning

Numerical study of the effect of transverse magnetic field on cylindrical and hemispherical CZ crystal growth of silicon

2010 ◽  
Vol 46 (4) ◽  
pp. 393-402 ◽  
Author(s):  
F. Mokhtari ◽  
A. Bouabdallah ◽  
A. Merah ◽  
S. Hanchi ◽  
A. Alemany
Keyword(s):  
Magnetic Field ◽  
Crystal Growth ◽  
Transverse Magnetic Field ◽  
Numerical Study ◽  
Transverse Magnetic

Heat Transfer in Liquid Metal at an Upward Flow in a Pipe in Transverse Magnetic Field

2020 ◽  
Vol 58 (3) ◽  
pp. 400-409
Author(s):  
N. A. Luchinkin ◽  
N. G. Razuvanov ◽  
I. A. Belyaev ◽  
V. G. Sviridov
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Liquid Metal ◽  
Transverse Magnetic Field ◽  
Transverse Magnetic ◽  
Upward Flow

High voltage vacuum breakdown in a weak transverse magnetic field

Vacuum ◽  
1968 ◽  
Vol 18 (7) ◽  
pp. 409
Author(s):  
A Watson ◽  
WR Bell ◽  
MJ Mulcahy
Keyword(s):  
Magnetic Field ◽  
Transverse Magnetic Field ◽  
High Voltage ◽  
Transverse Magnetic ◽  
Vacuum Breakdown
Sign in / Sign up

Export Citation Format

Share Document