Entropy generation of double-diffusive convection in the presence of rotation

Entropy generation of double-diffusive convection in the presence of rotation
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存在旋转时双扩散对流的熵产生

DOI:
10.1016/j.amc.2011.03.095
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发表时间:
2011-07
影响因子:
4
通讯作者:
Sheng CHEN
Sheng CHEN
中科院分区:
数学2区
文献类型:
--
作者:
Sheng CHEN

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本文首次研究了旋转作用下双扩散对流的熵产生问题。为了系统地揭示包体旋转(浮力频率与科里奥利频率ST之比)和浮力Rp之比对熵产生的影响,我们将所研究的情况分为两组:(1)Rp固定,但ST在0.001~10之间变化;(2)ST固定,但Rp在0.1~2之间变化。我们发现,只有快速旋转才对熵产生分布有显著影响。此外,由于浓度扩散引起的不可逆性份额随着Rp的增加而迅速增加,并且从Rp>0.6开始成为产生熵的主要贡献者。
In the present study, the entropy generation of double-diffusive convection in the presence of rotation is investigated for the first time. In order to reveal the effects of rotating of the enclosure (described by the ratio of buoyancy frequency to Coriolis frequency St) and the ratio of buoyancy forces R p on entropy generation systematically, we divide the cases investigated in the present study into two groups:(1) R p is fixed but St varies from 0.001 to 10;(2) St is fixed but R p varies from 0.1 to 2. We find that only fast rotation has significant influence on entropy generation distribution. Moreover, the share of irreversibility due to concentration diffusion increases quickly with R p and it becomes the main contributor to entropy generation since R p> 0.6.
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