Numerical simulation of salt particle - Supercritical water flow in a 90° bend Pipe

Salt deposition from supercritical water has been identified as a key issue in the development of supercritical water technologies. In order to better understand salt deposition behavior, the salt particle - supercritical water flow in a 90° bend pipe with smooth walls was simulated using discrete element method (DEM) coupled with computational fluid dynamics (CFD). The transport behavior of pure supercritical water flow and salt particle-supercritical water flow with diiferent particle sizes were both simulated. The numerical results indicates that for the pure supercritical water flow, the primary flow accelerated near the inner wall and a secondary flow moving from the outer to the inner wall of the bend. The salt particle accumulation in the inner wall of horizontal pipe is the most notable feature in the salt - supercritical water flow.