Abstract
Comparison of Commercial and Open-Source CFD Solvers on Surface Tension Dominated Flows
Highlights
The occurrence of multiphase flows is characterised by the presence of two or more distinct phases, namely solid, liquid and vapour
The Coupled Level-Set and Volume of Fluid Method (CLSVOF) [7] combines the advantages of the VOF and LS methods, using the VOF method to calculate the volume fraction field and the LS to compute the geometrical properties at the interface
The normal vector and curvature calculation can be estimated using Height-Functions [9]. These geometric functions compute the curvature from volume fractions/level-set function directly on the interface, where the VOF/LS methods estimate the curvature on the cell centres, leading to a better approximation
Summary
The occurrence of multiphase flows is characterised by the presence of two or more distinct phases, namely solid, liquid and vapour. According to Popinet [3], Eulerian fields are suited for fluid mechanics due to the necessity of dealing with large deformations These can either be coupled with a Lagrangian or Eulerian representation of the interface. This interface lies within a control volume with a volume fraction that varies between 0 and 1 This method is suited for mass conservation, inaccurate in calculating the normal vector and curvature, among other smooth properties, leading to a low resolution interface. The normal vector and curvature calculation can be estimated using Height-Functions [9] These geometric functions compute the curvature from volume fractions/level-set function directly on the interface, where the VOF/LS methods estimate the curvature on the cell centres, leading to a better approximation. Quantitative and qualitative analysis regarding crown height and outer diameter measurements, and crown evolution and splashing occurrence, respectively, are presented
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