Development of Bubble Size Correlation for Adiabatic Forced Convective Bubbly Flow in Low Pressure Condition Using CFD Code

Applied Sciences

Dongjin Euh¹  Jinyeong Bak²  Huiyung Kim²  JaeJun Jeong²  Byongjo Yun² 

[1] Korea Atomic Energy Research Institute, Daedeok-daero 989-111, Yuseong-gu, Daejeon 34057, Korea;School of Mechanical Engineering, Pusan National University, Busandaehak-ro 63-2, Geumjeong-gu, Busan 46241, Korea;

关键词: bubble size model;    interfacial transfer term;    number density transport equation;    bubbly flow;    CFD simulation;   

DOI  :  10.3390/app10165443

来源: DOAJ

【 摘 要 】

In a multidimensional two-phase flow analysis, bubble size significantly affects interfacial transfer terms such as mass, momentum, and energy. With regard to bubbly flow, the application of a simple correlation-type bubble size model presents certain advantages, including short calculation times and ease of usage. In this study, we propose a semi-theoretical correlation developed from a steady state bubble number density transport equation for predicting the distribution of local bubble size using a computational fluid dynamics (CFD) code. The coefficients of the new correlation were determined using the local bubble parameters obtained on the basis of three existing vertical air-water experiments. Finally, these were implemented in commercial CFD code and evaluated against experimental data, which showed that the proposed correlation exhibits good prediction capability for forced convective air-water bubbly flows under low pressure conditions.

【 授权许可】

Unknown