Hydraulic control of flow in a multi-passage system connecting two basins
Hydraulic control of flow in a multi-passage system connecting two basins
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连接两个水池的多通道系统中流量的液压控制
DOI：
10.1017/jfm.2022.212
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发表时间：
2022
影响因子：
3.7
通讯作者：
Carter, G.S.
中科院分区：
文献类型：
--
作者：
Tan, S.;Pratt, L.J.;Voet, G.;Cusack, J.M.;Helfrich, K.R.;Alford, M.H.;Girton, J.B.;Carter, G.S.
当管道中的流体为了绕过障碍物而分裂时，可能会出现一条支路受到严格控制而另一条支路不受控制的情况。这显然是太平洋深海环流的情况，南极大部分向北的底层水通过萨摩亚航道，在那里它受到水力控制，而其余的则改道绕过马尼希基高原，不受控制。这些观测结果提出了一些问题，涉及在稳态下支持这一机制所需的动力学、上游影响的性质以及旋转水力理论在假设受控分支无粘性的情况下预测两条路径之间的体积输送分配的有效性。通过应用定势涡流理论和相应的数值模型，我们证明了在不受控制的支流中存在足够的底摩擦力的情况下，一个与所观察到的情况类似的稳态区在动力学上是可能的。在这种情况下，通常存在于旋转槽道流的上游影响转化为对如何划分流的影响。因此，利用缺乏上游影响的无粘性理论，仍然可以相当好地预测体积通量的分配。
When a fluid stream in a conduit splits in order to pass around an obstruction, it is possible that one branch will be critically controlled while the other remains not so. This is apparently the situation in Pacific Ocean abyssal circulation, where most of the northward flow of Antarctic bottom water passes through the Samoan Passage, where it is hydraulically controlled, while the remainder is diverted around the Manihiki Plateau and is not controlled. These observations raise a number of questions concerning the dynamics necessary to support such a regime in the steady state, the nature of upstream influence and the usefulness of rotating hydraulic theory to predict the partitioning of volume transport between the two paths, which assumes the controlled branch is inviscid. Through the use of a theory for constant potential vorticity flow and accompanying numerical model, we show that a steady-state regime similar to what is observed is dynamically possible provided that sufficient bottom friction is present in the uncontrolled branch. In this case, the upstream influence that typically exists for rotating channel flow is transformed into influence into how the flow is partitioned. As a result, the partitioning of volume flux can still be reasonably well predicted with an inviscid theory that exploits the lack of upstream influence.
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影响因子：
3.7
作者：
C. Shen
通讯作者：
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影响因子：
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作者：
K. Borenäs;P. Lundberg
通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
K. Helfrich;Allen C. Kuo;L. Pratt
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影响因子：
3.5
作者：
K. Helfrich;L. Pratt
通讯作者：
L. Pratt