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Problem Description

The problem to be considered is shown schematically in Figure  12.1. A 2D axisymmetric valve geometry is used, consisting of a mass flow inlet on the left, and a pressure outlet on the right, driving the motion of a valve. In this case, the transient closure of the valve is studied. Note, however, that the valve in this case is not completely closed. Instead, for the sake of simplicity, a small gap remains between the valve and the valve seat (since dynamic mesh problems require that at least one layer remains in order to maintain the topology).

Figure 12.1: Problem Specification
figure


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