Effect of a new synthetic bubble model on forces in simulations of two-phase flows in tube bundles

In this paper, the influence of phase distribution imposed as an inlet boundary condition in a two-phase flow simulation is investigated. Firstly, new model proposed which defines transient to be applied subsequent Eulerian simulation, more specifically using Volume-Of-Fluid method. This aimed at generating large gas bubbles, making Lagrangian approach less applicable. The model, coined “Synthetic Bubble Model” (SBM), generates with bubbles such that there no need for bubble creation through break-up continuous jet long region upstream interest, results smaller computational mesh. on 5-by-3 tube bundle subjected axially flowing air/water mixture and compared precursor-domain are created by air jets inlet. Compared precursor domain simulations, SBM both faster or equally accurate. Secondly, cross-flow modelled. It shown yields better correspondence experimental force data than steady condition, case without addition (yielding similar time simulations).