Interface retaining coarsening of multiphase flows

@article{Chen2021InterfaceRC,
  title={Interface retaining coarsening of multiphase flows},
  author={Xianyang Chen and Jiacai Lu and Gr{\'e}tar Tryggvason},
  journal={Physics of Fluids},
  year={2021}
}
Multiphase flows are characterized by sharp moving interfaces, separating different fluids or phases. In many cases the dynamics of the interface determines the behavior of the flow. In a coarse, or reduced order model, it may therefore be important to retain a sharp interface for the resolved scales. Here, a process to coarsen or filter fully resolved numerical solutions for incompressible multiphase flows while retaining a sharp interface is examined. The different phases are identified by an… 

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