Thermal hydraulics

This chapter describes thermal hydraulic studies. Section 3.1 describes the heat transfer and fluid flow studies with surrogate fluids. It includes the heat transfer and pressure drop measurements in single tube, single rod, rod bundle geometries. Effect of grid spacer on heat transfer and critical heat flux at near critical-pressure are described. The results of the experiments on condensation, critical-flow and cross-flow between bundle channels are summarized. The author of sections from 3.1.1 to 3.1.4 and 3.1.7 is Hideo Mori. The sections of 3.1.5 and 3.1.6 are authored by Hideo Mori and Yoshinori Hamamoto. Section 3.2 describes heat transfer experiments in single tube geometry with supercritical water for validation of the data of surrogate fluids. The author is Koichiro Ezato. Section 3.3 describes computational fluid dynamics (CFD) analysis of the experiments. The authors are Takeharu Misawa and Kazuyuki Takase.