Formation of the "Superconducting" core in turbulent thermal convection

被引：24
作者：
Niemela, J. J. [1 ]
Sreenivasan, K. R. [1 ]
机构：
[1] Abdus Salam Int Ctr Theoret Phys, I-34014 Trieste, Italy
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 18期
关键词：
19;
D O I：
10.1103/PhysRevLett.100.184502
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A sinusoidal temperature perturbation is superimposed on the bottom plate of a cylindrical convection cell, and its decay is measured at the cell midheight. Rayleigh numbers up to Ra=10(13) and aspect ratios 1 and 4 are considered. The technique allows a dynamic measurement of the height of the layer interposed between the superconducting core and the boundary. This deduced height is in good agreement with results from recent numerical simulations.
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