“…This Special Issue, titled 'Numerical Heat Transfer and Fluid Flow 2022', presents articles addressed to Energies and is a continuation of the 2021 edition [1]. The authors of this Special Issue describe solutions of scientific and industrial relevance in a specific field of heat transfer and fluid flow, including technical devices, nanofluids, industrial processes, dedicated perforations or mechanically deformed pipes, the transport of solid particles, etc.…”