Numerical investigations of flooding for two-phase counter-current flow

Abstract

For certain values of fluid velocity of two phases, a wave forms covering as well as blocking the area of cross-section of the closed conduit of two phase flow. This phenomenon is called Flooding. The best example is the case of leakage in the essential cooling circuit of the reactor. This is highly undesirable and risky as it may be detrimental in the functioning of the system (for example- a nuclear explosion). Hence, efforts are being made to correctly predict the occurrence of flooding phenomena in nuclear reactor plant. It has been established from the work done in flooding that there is a lack of a universal parameter for its determination. The aim of the current allotted task is to numerically investigate phenomena of flooding in the duct of the hot power leg in nuclear reactor. The situation of the on-set of flooding is predicted and analyzed for different initial depth of water in duct of hot power leg using VOF model with Finite volume method for its prediction.