TY - JOUR TI - From the Guest editors: ENERGY SYSTEMS, MULTIPHASE FLOWS, AND SUSTAINABLE COMBUSTION TECHNOLOGIES AU - Vujanović Milan AU - Schneider Daniel Rolph AU - Oka Simeon AU - Guzović Zvonimir AU - Duić Neven JN - Thermal Science PY - 2018 VL - 22 IS - 5 SP - 0 EP - 0 PT - Article AB - This Special issue of Thermal Science journal contains scientific articles presented at the 12th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES 2017) held in Dubrovnik, Croatia, in the period from October 4th to October 8th, 2017. The SDEWES conference is an international scientific conference that gathers scientists and professionals from the field of sustainable development. The conference has brought together 530 scientists, researchers, and experts from 60 countries in the field of sustainable development of energy and environment. This editorial is based upon 30 papers selected from among 550 contributions presented at the 12th SDEWES Conference. The topics covered in this Special Issue include experimental and numerical research in the field of heat and mass transfer, multiphase flows, sustainable combustion and pollutant emission, and advances in the energy systems and technologies within the framework of sustainable development.