Droplets interaction effects on the heat removed by droplets impact onto heated wall in a polydispersed flow film boiling

Alexandre Labergue,Arthur Oliveira,Juan Luna,Michel Gradeck,Tony Glantz

doi:10.2218/iclass.2021.5934

Abstract

Droplets interaction effects on the heat removed by droplets impact onto heated wall in a polydispersed flow film boiling

Highlights

During a hypothetical loss of coolant accident (LOCA) in a pressurized water reactor, water is injected into the reactor core to cool it down, a process known as reflooding
A dispersed flow of steam and droplets is formed inside the core of a pressurized water reactor after a loss of primary coolant accident (LOCA)
We presented NECTAR, a mechanistic code that calculates heat and mass transfer of a dispersed flow inside a fuel subchannel

Summary

Introduction

During a hypothetical loss of coolant accident (LOCA) in a pressurized water reactor, water is injected into the reactor core to cool it down, a process known as reflooding. We presented NECTAR, a mechanistic code that calculates heat and mass transfer of a dispersed flow inside a fuel subchannel. This work presents numerical simulations of heat transfer by droplets impact using NECTAR for a straight vertical tube with different droplets’ volume fraction, from 10−4 to 0.6, considering a wetted wall correction factor proposed by Breitenbach et al [2].

Results

Conclusion