The Conference Proceedings will be published with an ISSN and ISBN, indexed in Google Scholar, and archived permanently in Portico. The 7th International Conference on Multiphase Flow and Heat Transfer (ICMFHT’21) aims to become the leading annual conference in fields related to Multiphase Flow and Heat Transfer. The goal of ICMFHT'21 is to gather scholars from all over the world to present advances in the relevant fields and to foster an environment conducive to exchanging ideas and information. This conference will also provide an ideal environment to develop new collaborations and meet experts on the fundamentals, applications, and products of the mentioned fields. ICMFHT'21 is an acronym for International Conference on Multiphase Flow and Heat Transfer.