Modeling of fluid dynamics interacting with ductile fraction propagation in high pressure pipeline |
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Authors: | Mihaela Popescu |
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Institution: | (1) Department of Process Technology, Flow Technology Group, SINTEF Materials and Chemistry, Trondheim, Norway |
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Abstract: | This paper presents a computational model for the fluid dynamics in a fractured ductile pipe under high pressure. The pressure
profile in front of the crack tip, which is the driving source of crack propagation, is computed using a nonlinear wave equation.
The solution is coupled with a one dimensional choked flow analysis behind the crack. The simulation utilizes a high order
optimized prefactored compact–finite volume method in space, and low dispersion and dissipation Runge–Kutta in time. As the
pipe fractures the rapid depressurization take place inside the pipe and the propagation of the crack-induced waves strongly
influences the outflow dynamics. Consistent with the experimental observation, the model predicts the expansion wave inside
the pipe, and the reflection and outflow of the wave. The model also helps characterize the propagation of the crack dynamics
and fluid flows around the tip of the crack. |
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Keywords: | Fluid dynamics High pressure pipeline Ductile fracture propagation Finite volume method |
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