Chapter 17   Unsteady flow of liquids in pipes



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Slow changes in flow


Sudden opening of a valve


Slow opening or closing of a valve


Sudden closing and slow closing of a valve


Behaviour of water in a pipe following sudden closure of a valve


Speed of propagation of a wave front


Effect of friction on the pressure/time trace


The concepts of rapid and slow closure


Water hammer


Other aspects of transient flow in pipes


Implications of this chapter


The hydraulic ram


Worked examples