[3C09-14] Simulation 2

3:15 PM - 3:30 PM JST(6:15 AM - 6:30 AM UTC)

[3C11] Application of PID control to bubble flow analysis using multi-phase field method

*Kenta Sugihara¹, Yos Panagaman Sitompul¹, Yasuhiro Idomura¹, Susumu Yamashita¹ (1. JAEA)

Keywords:

Gas-liquid two-phase flow,Multi-phase field method

In bubble flow simulations in a circular tube with periodic boundary conditions, the fluid flow is driven by a pressure gradient. Suppose the pressure gradient observed in experiments is applied as an external force. In that case, the flow will accelerate or decelerate without balancing the force, resulting in a deviation from the assumed flow rate. In this study, the pressure gradient is controlled using PID control, widely used in control theory, to enable analysis of bubbly flow at a specified flow rate. The void fraction and velocity distribution are compared with experimental data from previous studies to verify the validity of this calculation.