题目内容
What kind of approach can be used to describe fluid flow in fluid dynamics?
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In approximate models, ( ) is widely used in model experiments about oil flow.
Commonly, the equipment used for measuring velocity and flow rate in engineering are ______ and ______ .
The kinematic viscosity of saturated steam is ______ at 200 ℃. And the dynamic viscosity of heavy oil is _(0.1pa·s)______ at 333.15 K.
Two fluid flow patterns are ______ and ______ ; Reynolds number can be used to judge the flow pattern. The expression of Reynolds number in circular pipe is = ______ , and the corresponding critical value of Re is ______ .
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