On limits to convective heat transport at infinite Prandtl number with or without rotation

On limits to convective heat transport at infinite Prandtl number with or without rotation
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无限普朗特数下旋转或不旋转时对流传热的限制

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发表时间:
2004
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通讯作者:
Xiaodong Yan
Xiaodong Yan
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作者:
Xiaodong Yan

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我们证明了严格的上界的体积热输运在无限普朗特数Rayleigh-Benard对流旋转或不旋转。对于无旋转的情形,我们的估计表明Nusselt数受Rayleigh数的限制,根据Nu ∈ c Ra 4/11,常数c<2. 在存在转动的情况下,我们证明了Nu ∈ c Ra ~(4/11)(12 Ta +1)~(4/11),其中常数c<2. 此外,对于弱旋转约束(Ta <$O(Ra 1/2)),Nusselt数一致上界为Nu <$c Ra 4/11。 
We prove rigorous upper bounds for the bulk heat transport in infinite Prandtl number Rayleigh–Benard convection with or without rotation. For the rotation free case, our estimate shows that the Nusselt number is bounded by Rayleigh number according to Nu⩽c Ra4/11 with constant c<2. In the presence of rotation, we prove Nu⩽c Ra4/11(12Ta+1)4/11 with constant c<2. Moreover, for weak rotating constraint (Ta⩽O(Ra1/2)), the Nusselt number is uniformly bounded above by Nu⩽c Ra4/11.