Convective temperature fluctuations in liquid gallium in dependence on static and rotating magnetic fields

被引:40
作者
Dold, P [1 ]
Benz, KW [1 ]
机构
[1] UNIV FREIBURG,INST KRISTALLOG,D-79104 FREIBURG,GERMANY
关键词
D O I
10.1002/crat.2170300823
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
The influence of static axial, static transversal, and rotating magnetic fields on convective temperature fluctuations in liquid gallium (temperature range around 800 degrees C, Prandtl number 2.5 . 10(-3)) has been investigated. For a Rayleigh number of 6.3 . 10(5) (Delta T = 10 degrees C, h = 50 mm), convective temperature fluctuations with peak to peak values of 3 degrees C have been measured. Depending on the strength, the frequency, and the configuration of the field, they could be eliminated to Delta T < 0.01 degrees C (static axial field of 182 mT), damped to a nearly periodic state with 0.1 degrees C amplitudes (static transversal field of 45 mT), or reduced to 0.03 degrees C oscillations by applying a rotating field.
引用
收藏
页码:1135 / 1145
页数:11
相关论文
共 19 条
[1]  
BIRAT JP, 1983, IRONMAK STEELMAK, V10, P269
[2]  
Brandes E.A., 1992, GEN PHYS PROPERTIES
[3]   SINGLE-CRYSTAL GROWTH WITH THE CZOCHRALSKI METHOD INVOLVING ROTATIONAL ELECTROMAGNETIC STIRRING OF THE MELT [J].
BRUCKNER, FU ;
SCHWERDTFEGER, K .
JOURNAL OF CRYSTAL GROWTH, 1994, 139 (3-4) :351-356
[4]  
Chandrasekhar S., 1961, HYDRODYNAMIC HYDROMA
[5]  
GELFGAT YM, 1994, IAF94J4251
[6]  
GELFGAT YM, 1985, MAGNETOHYDRODYNAMICS, V1, P65
[7]  
Hurle D.T.J., 1993, CRYSTAL PULLING MELT
[8]  
IIDA T, 1993, PHYSICAL PROPERTIES
[9]   CRYSTAL-GROWTH FROM MELT UNDER DESTABILIZING THERMAL GRADIENTS [J].
KIM, KM ;
WITT, AF ;
GATOS, HC .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1972, 119 (09) :1218-&
[10]   QUANTITATIVE-ANALYSIS OF EFFECTS OF DESTABILIZING VERTICAL THERMAL GRADIENTS ON CRYSTAL-GROWTH AND SEGREGATION - GA-DOPED GE [J].
KIM, KM ;
WITT, AF ;
LICHTENSTEIGER, M ;
GATOS, HC .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1978, 125 (03) :475-480