Spatially localized magnetoconvection

Spatially localized magnetoconvection
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空间局部磁对流

DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Edgar Knobloch
Edgar Knobloch
中科院分区：
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文献类型：
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作者：
D. L. Jacono;A. Bergeon;Edgar Knobloch

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采用数值延拓的方法，以钱德拉塞卡数Q值在10 < Q < 103范围内为中心，计算了垂直磁场中与时间无关的空间局域对流的分支。计算表明，对流最初是通过在两侧附加成核细胞来生长的，但随着通量排出导致外部场的积累，对流只能通过扩大组成细胞来输送更多的热量。因此，在大Q和大瑞利数时，对流由少量的宽单元组成。
Numerical continuation is used to compute branches of time-independent, spatially localized convectons in an imposed vertical magnetic field focusing on values of the Chandrasekhar number Q in the range 10 < Q < 103. The calculations reveal that convectons initially grow by nucleating additional cells on either side, but with the build-up of field outside owing to flux expulsion, the convectons are able to transport more heat only by expanding the constituent cells. Thus, at large Q and large Rayleigh numbers, convectons consist of a small number of broad cells.