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fjtony163: ½ð±Ò-5, ÑϽû¹àË® 2020-06-30 03:16:52
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A factor is that the friction coefficient (f) is proportional to the pressure drop. The pulsating flow is composed of a steady flow superimposed with a forced vibration flow, and changes periodically with time, which in turn causes the pressure drop to show periodic changes, hence the friction coefficient (f) gives the periodic changes. The friction coefficient hardly changes if the fluid flow is kept constant under the stationary flow field.
There is a will,there is a way.
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