Numerical Simulation on Direct Contact Condensation of Single Bubble in Subcooled Water using MPS method

摘要

In present study, single steam bubble condensation in subcooled water have been simulated by using Moving Particle Semi-implicit(MPS) method. The liquid phase was described using moving particles and the two phase interface was set to be movable boundary which can be easily traced according to the motion of interfacial particles. The transient bubble deformation behaviors have been obtained and the results showed that both initial bubble size and subcooled degree influence bubble deformation behaviors greatly. Larger bubble experiences more severe deformation at lower liquid subcooled degree while bubble keeps near sphericity at higher liquid subcooled degree. All transient shape sequences can be found and explained properly in Grace's graphic correlation. This work exhibits some fundamental characteristics of bubble condensation using MPS-MAFL which is expected to be further adopted to evaluate other complicated bubble dynamics problems.