Inproceedings,

Time scales and FSI in unsteady liquid-filled pipe flow

, and .
Pressure Surges (Proceedings of the 9th International Conference, Chester, UK), (March 2004)

Abstract

Time scales are used to classify unsteady flow in liquid-filled pipes. Seven types of pipe flow are distinguished, with time scales ranging from infinity to zero. Nothing happens when the time scale tends to infinity: the flow is steady. Everything seems to happen when the timescale tends to zero: all (coupled) modes of vibration of liquid and pipe are excited. The complexity of mathematical models describing the phenomena increases as time scales become smaller.

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