Editorial: Complex Flow and Heat Transfer in Advanced Nuclear Energy Systems

Nuclear energy is a crucial source of energy supply worldwide and is essential for achieving carbon neutrality. This is particularly true for advanced nuclear energy systems. In these systems, the complexity of flow and the efficiency and stability of heat transfer present ongoing challenges that necessitate further research efforts. In this specialized issue entitled "Complex Flow and Heat Transfer in Advanced Nuclear Energy Systems", a collection of related research works, including experimental research and numerical simulation works were gathered.Li Yong and colleagues conducted research focusing on condensation and acoustic characteristics of steam condensation. They experimentally studied the complex twophase flow regimes and acoustic characteristics of direct contact condensation when steam is injected into water.Mengmeng Liu, et al. carried out numerical simulations on heat transfer of supercritical pressure water in a helical tube. This process occurs in a supercritical steam generator, which may potentially be used for future high-temperature gas-cooled reactors.In the research carried out by Ji Wang, et al., an intriguing method was intruded to study