| Abstract |
The application of two-phase Computational Fluid Dynamics (CFD) modelling to geothermal surface facilities design presents a significant advancement over empirical methods derived from limited experimental and field data and limited piping and plant configurations. This study explores the utilization of CFD to simulate the complex interactions between liquid and vapor phases within geothermal pipelines, separators, and other equipment. By modelling these two-phase flows, we can predict phase distribution, pressure drop and other parameters under various operational conditions and plant configurations. Function improvements can be identified. Additionally, the study investigates the role of CFD in analysing accidents and dynamic system behaviours, providing insights into potential failure modes and safety improvements. Various modelling methods, including Volume of Fluid (VOF), Eulerian multiphase (EMP), Lagrangian multiphase (LMP) and fluid-structure interaction (FSI) approaches, are discussed, along with their respective advantages and limitations. Case studies CFD in geothermal applications are summarised. The results demonstrate that CFD modelling can provide valuable insights into the design and operation of geothermal surface facilities, leading to improved plant performance and safety. Open questions in facilities design where CFD could be beneficial are discussed |