This open access book presents the main results of the Collaborative Research Center SFB-TRR 75
which spanned the period from 2010 to 2022. Scientists from a variety of disciplines ranging
from thermodynamics fluid mechanics and electrical engineering to chemistry mathematics
computer science and visualization worked together toward the overarching goal of SFB-TRR 75
to gain a deep physical understanding of fundamental droplet processes especially those that
occur under extreme ambient conditions. These are for example near critical thermodynamic
conditions processes at very low temperatures under the influence of strong electric fields
or in situations with extreme gradients of boundary conditions. The fundamental understanding
is a prerequisite for the prediction and optimisation of engineering systems with droplets and
sprays as well as for the prediction of droplet-related phenomena in nature. The book includes
results from experimental investigations as well as new analytical and numerical descriptions
on different spatial and temporal scales. The contents of the book have been organised
according to methodological fundamentals phenomena associated with free single drops drop
clusters and sprays and drop and spray phenomena involving wall interactions.
