Assessment of the depressurisation and mixing effects of two spray systems in the PANDA facility, part II – Simulations using GOTHIC8.3(QA)

Assessment of the Depressurisation and Mixing Effects of Two Spray Systems in the Panda Facility, Part Ii – Simulations Using Gothic8.3(Qa)

“…The potential increase of the Heat Transfer Coefficient (HTC) induced by turbulence was studied by means of Anderson's correlation (Maciejewski and Anderson, 1996), which is an equation without geometry dependence based on the fluid properties and a linear relationship between the maximum turbulent fluctuation velocity and the heat flux. Previous experiences proved the convenience of the correlation developed in (Maciejewski and Anderson, 1996) for improving the agreement of single nozzle experiments and GOTHIC calculations (Vázquez-Rodríguez et al, 2022b). For the base case of H2P5_2, the increase of the HTC calculated from the Anderson correlations was between 1.5 and 2.2 for different times and locations, and it has been implemented in the base case models.…”

“…Though the mesh size for the base case is still coarser than the typical meshes used for commercial CFD codes (Andreani et al, 2019), it has more cells than previous calculations to simulate the spray actuation with GOTHIC in PANDA (Andreani and Erkan, 2010;Vázquez-Rodríguez et al, 2022b). The finer mesh was used to allow an accurate calculation of the wall-to-fluid heat transfer, anticipating the important role that it should play in the multi-nozzle test.…”