Structure of a turbulent bubbly flow and heat transfer in a vertical tube

被引：0
|
作者：
Lobanov, P. D. [1 ]
Pakhomov, M. A. [1 ]
Terekhov, V., I [1 ]
Das, P. K. [2 ]
机构：
[1] Kutateladze Inst Thermophys SB RAS, Novosibirsk, Russia
[2] Indian Inst Technol, Kharagpur, W Bengal, India
来源：
THERMOPHYSICS AND AEROMECHANICS | 2020年 / 27卷 / 04期
关键词：
bubbly polydisperse flow; tube; bubble spreading; heat transfer; wall friction; delta-approximation method; turbulence; PHASE DISTRIBUTION; 2-PHASE FLOW; BREAK-UP; LIQUID; COALESCENCE; SIMULATION; STRESS; MODEL;
D O I：
10.1134/S0869864320040095
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
The results of numerical simulation of the flow structure and heat transfer in a vertical polydispersed bubbly flow are presented. The mathematical model is based on the Euler approach taking into account the effect of bubbles on the mean characteristics and turbulence of the carrier phase. The polydispersed distribution of bubbles size in a two-phase flow is modeled by the method of delta approximation considering the process of bubble break-up and coalescence. Carrier phase (fluid) turbulence is predicted using the Reynolds stress transport model. The simulation results showed good agreement with the experimental data presented in the literature. The measured and predicted thermal-hydraulic parameter distribution indicates that in a turbulent bubbly flow, the wall friction increase is greater than heat transfer enhancement.
引用
收藏
页码：565 / 571
页数：7
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