September 10, 2025ProcessesOpen Access

Numerical Simulation of Transient Two-Phase Flow in the Filling Process of the Vertical Shaft Section of a Water Conveyance Tunnel

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This analysis reveals how transient two-phase flow affects water conveyance systems, highlighting risks and behaviors during filling.

Higher filling flow rates destabilize the water conveyance process, leading to increased risks.
Simulations indicate that gas retention in low-pressure caverns results in variable behavior during filling.
Utilizing a Volume of Fluid multiphase model, we analyze hydraulic parameters like flow patterns and pressure.
Increased flow rates lead to intensified phase changes and elevated pressure fluctuations in the system.

Sun et al. (2025) studied this question.

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