  The accurate representation of surface tension driven flows in multiphase
systems is considered a challenging problem to resolve numerically. Although
there have been extensive works in the past that have presented approaches to
resolve these so called Marangoni flows at the phase boundaries, the question
of how to efficiently resolve the interface in a universal and conservative
manner remains largely open in comparison. Such problems are of high practical
relevance in many manufacturing processes, especially in the microfluidic
regime where capillary effects dominate the local force equilibria. In this
work, we present a freely available numerical solver based on the Finite Volume
Method that is able to resolve arbitrarily complex, incompressible multiphase
systems with the mentioned physics at phase boundaries. An efficient solution
with respect to the number of degrees of freedom can be obtained by either
using high order WENO stencils or by employing adaptive cell refinement. We
demonstrate the capabilities of the solver by investigating a model benchmark
case as well as a single track laser melting process that is highly relevant
within laser additive manufacturing.
