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A multi-mesh numerical valve model has been developed to analyze the opening characteristic of high-pressure safety valves. Newton’s law and the CFD result for the flow force are used to model the movement of the valve. In incompressible transient flow simulations a large force rise and collapse is caused by a redirection of the bulk flow. This flow-history effect cannot be incorporated in a quasi-steady...
This paper addresses the critically important issue regarding the appropriate size of the discretisation elements whilst ensuring stability and reasonable computational work loads for the numerical simulation of highly transient flows. The simulation of outflow following the puncture of a hypothetical 100m pipeline at 21.6bara (2160kPa) and 293.15K is used as a case example. The pipeline is assumed...
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