adam3D; Adaptive Multiphase 3D flow solver

A marker-based 3-D adaptive Eulerian-Lagrangian method has been developed to perform a 3-D multiphase flow computation around irregular solid geometries. The bulk flow variables are solved on the stationary (Eulerian) background grid, whereas interface variables are handled by moving (Lagrangian) markers. A single fluid formulation for all fluid phases is made possible by smoothing out the properties across the interface and applying surface tension as a source term in the momentum equation via continuous interface method. The solid boundaries, which typically require the no-slip condition, are treated via the solid interface method by reconstructing solution fields around the solid boundary using ghost cell. The contact line at the location where the fluid interface meets solid geometries are modeled by simplified contact line force model. For effective computation, geometry- and solution-based local grid adaptation is implemented. The components of the numerical algorithm and their interactions are summarized in the following figure.

<Summary of the present marker-based 3-D adaptive Eulerian-Lagrangian method>