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Author: WikiMatrix
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English[en]
In this situation, the rigid rotating enclosure provides an extra force, namely an extra pressure gradient in the water, directed inwards, that prevents evolution of the rigid-body flow to the irrotational state.
Chinese[zh]
在這些狀況下,剛體旋轉的水桶外殼提供了一個額外的力,即方向向內的水的額外壓力梯度,並且阻止了剛性渦旋流演變為無旋流。