I have the pleasure and priviledge of having just been appointed as the new Editor-in-Chief of Fluids, published by MDPI.
It is an Open Access journal which has developed and gone from strength to strength under Mehrdad Massoudi, the outgoing EiC.
To quote the website for the journal, https://www.mdpi.com/journal/fluids ,
"Fluids (ISSN 2311-5521) is an open-access journal, which provides an advanced forum for studies on all aspects of fluid and its applications, including mathematical modeling, numerical simulation, and experiments. Our aim is to publish state-of-the-art papers, including original research papers, reviews, case reports, as well as technical notes and meeting reports. There is no restriction on the length of the papers."
The journal publishes regular papers and Topical Collections. It also publishes Special Issues which are typically dedicated to chosen topics (such as Fundamentals of CO2 Storage in Geological Formations) or else inspired by individuals (e.g. to honour a significant birthday).