Developing a 3D incompressible vof based multiphase solver using OpenFOAM libraries

In the recent past open source analysis software have been on the demand for\ud studying various phenomenon related to uids and solids. To counter act the\ud booming prices of commercial CFD and FEM toolkits, open source software pro-\ud vide the key. In the eld of computational uid dynamics, open source cfd toolkit\ud , OpenFOAM (Open source Field Operation And Manipulation) is a viable al-\ud ternative to commercial cfd toolkits like FLUENT, StarCCM+, etc.\ud In the following thesis, an attempt has been made to address standard droplet\ud breakup problem using OpenFOAM. The thesis aims at developing an incom-\ud pressible multiphase vof (volume of uid) based solver which works on a SMAC\ud algorithm, using the native OpenFoam libraries.\ud The native vof solver of OpenFOAM and the newly developed explicit solver are\ud tested against standard benchmark cases like 3D lid driven cavity, vortex in a\ud box, dual vortex stretching, spurious currents, square bubble to circle, cubical\ud bubble to sphere, dual vortex stretching and droplet splashing and compared in\ud terms of accuracy and computational time. This knowledge led to deciding upon\ud optimum case setup parameters which was then used to address the problem at\ud hand: droplet breakup.\ud For the droplet breakup analysis, two droplets with di erent diameters ratios\ud were allowed to collide for di erent Reynolds number and Weber numbers. The\ud collisions were also studied for di erent o sets parameters.\ud Apart from above standard cases, other important features of OpenFOAM such\ud as di erent linear solvers, numerical schemes, multicore operational capabilities,\ud dynamic mesh re nement and static mesh re nement were also tested and re-\ud ported