Numerical simulation of solid - liquid two - phase flow deposition on the surface of tube bundle

2018 International Conference on Civil and Hydraulic Engineering

土木建筑工程;水利工程

Yangyan, Zheng^1 ; Youjun, Ye^1 ; Yang, Xie Chuan^2 ; Kai, Zheng^1 ; Yanping, Yu^1

Special Equipment Safety Supervision Inspection Institute of Jiangsu Province, China^1

School of Energy Science and Engineering, Nanjing Tech University, Nanjing, Jiangsu, China^2

关键词: 3D geometric model;    Dynamic pressures;    Euler-lagrange models;    Fouling depositions;    Geometry model;    Impact dynamics;    Particle trajectories;    Solid-liquid two phase flows;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/189/5/052025/pdf
DOI  :  10.1088/1755-1315/189/5/052025

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Based on finite volume method, the Reynolds number of fluid affecting solid-liquid two phase deposition on the outer surface of tubes has been predicted. A 3D geometric model of fluid flow cross tube bundles is established. The particle trajectory was tracked by Euler - Lagrange model. The results show that: different Reynolds number of fluid impact dynamic pressure which is consistent with the distribution of fouling deposition. That is to say, dynamic pressure can be treated as indicator when monitor the fouling deposition on the surface of tube bundle. The deposition rate of particles is positively correlated with dynamic pressure. In addition, based on this geometry model, with the increment of Reynolds number, average accretion rate tend to stabilize to, rather than increase indefinitely. The location of the most serious accretion rate is always on the joint between the pipe and the shell, especially, on the surface of windward.