A pipeline depressurization model for fast decompression and slow blowdown

摘要: The development and validation of CFD-DECOM, a pipeline depressurization model based on the arbitrary Lagrangian–Eulerian method (ALE) homogeneous equilibrium assumption is presented. In convection terms are separately solved from other in sub-cycled explicit manner using sub-timestep that only fraction main computational timestep. This approach significantly simplifies solution procedure improves efficiency. validated against five release scenarios including one fast decompression rich gas four slow blowdown cases liquefied petroleum pipeline. predicted pressure, temperature fluid inventory-time traces found to be good agreement with measurements all cases.