The effect of particle wake on the heat transfer characteristics between interactive particles in supercritical water

The effect of particle wake on the heat transfer characteristics between interactive particles in supercritical water is simulated and analyzed. The main influencing factors include particle distance, Reynolds number (Re), particle temperature and pressure. It is found that the distance and Re affect the strength of wake vortex and the temperature gradient on the trailing particle surface. For the effect on the heat transfer characteristics, the temperature gradient is dominant, and the vorticity has an obvious effect within a certain Re and distance range. Temperature and pressure affect the physical properties in the particle wake. The physical property changes on the trailing particle surface are smoother affected by the leading particle. A new statistically significant heat transfer ratio correlation is established for interactive particles in supercritical water. The maximum error of this correlation is 7.3%. (c) 2021 Elsevier Ltd. All rights reserved.