Abstract
In the theory in Section 2.2 we assumed that water is completely incompressible and that a pipe may be completely rigid. The pressure changes obtained in this way are reasonably accurate if the change of flow is slow and smooth. If, however, the change of flow is sudden, i.e. if T = 0, where T is the time of the valve movement, then dv/dt would be infinite and the pressure increase or decrease would be infinite. Experiments show that the change of pressure is finite.
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References
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© 1969 John Pickford
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Pickford, J. (1969). Elastic Theory for a Simple Pipe. In: Analysis of Surge. Macmillan Civil Engineering Hydraulics. Palgrave, London. https://doi.org/10.1007/978-1-349-00160-6_3
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DOI: https://doi.org/10.1007/978-1-349-00160-6_3
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