Tarek H Nigim

Abstract: This study explores the phenomenon of flashing within dedicated chambers, pivotal for water purification in multistage flash (MSF) systems. Introducing a new classification encompassing ideal, infinite, and finite flashing processes, we employ a computational approach using a two-phase Volume-of-Fluid (VOF) model. Our model accurately reproduces phase-change phenomena, free surface dynamics, and thermofluid behaviour. Validation against real-world data from operational flashing chambers precedes an examination of the effects of finite and infinite flashing processes on flow patterns and thermal performance. Our findings emphasize the significant influence of flashing process types, finite or infinite, on thermofluid behaviour within the evaporation zone. This study provides valuable insights into the complex multiphase dynamics of flashing, essential for optimizing MSF Desalination.

Keywords: multiphase; VOF; finite and infinite flashing; thermofluid behaviour; MSF, Water purification.

Date Published: June 14, 2024
DOI: 10.11159/jffhmt.2024.011

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