期刊
JOURNAL OF FLUID MECHANICS
卷 720, 期 -, 页码 486-516出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jfm.2013.45
关键词
convection; magnetohydrodynamics
资金
- Moscow Power Engineering Institute
- Ministry of Education and Science of the Russian Federation, Russian Fund for Basic Research [12-08-12035]
- US NSF [CBET-0966557, CBET-1232851]
- D. L. Timrot foundation
- Directorate For Engineering [0966527] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1232851] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys [0966527] Funding Source: National Science Foundation
Linear stability analysis and direct numerical simulations are conducted to analyse mixed convection in a liquid metal flow in a horizontal pipe with imposed transverse magnetic field. The pipe walls are electrically insulated and subject to constant flux heating in the lower half. The results reveal the nature of anomalous temperature fluctuations detected in earlier experiments. It is found that, at the magnetic field strength far exceeding the laminarization threshold, the natural convection develops in the form of coherent quasi-two-dimensional rolls aligned with the magnetic field. Transport of the rolls by the mean flow causes high-amplitude, low-frequency fluctuations of temperature.
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