Influences of Elastic Parameters on Drag-Reduction Effect in Turbulent Flow of Viscoelastic Fluid

2018 International Conference on Advanced Technologies in Energy, Environmental and Electrical Engineering

能源学;生态环境科学;无线电电子学

Yang, Chen^1^2 ; Feng, Wei^1^2 ; Liu, Jianzeng^1^2 ; Gao, Xuan^1^2 ; Tian, Zhida^3 ; Wang, Caizhong^1^2

College of Petroleum Engineering, China University of Petroleum at Beijing, Beijing, China^1

State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum at Beijing, Beijing, China^2

Drilling and Production Research Institute, Liaohe Oilfield Company, Petro China, Panjin

124010, China^3

关键词: Elastic parameters;    Reduction effects;    Reynolds averaged navier-stokes models;    Upper limits;    Vis-coelastic fluids;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/223/1/012017/pdf
DOI  :  10.1088/1755-1315/223/1/012017

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A 3D Reynolds-averaged Navier-Stokes (RANS) model was refined in the paper based on the K -- v'2 - f turbulence model to simulate the drag reduction (DR) flow in the tube. The influence of elastic parameters on the drag reduction effect was studied using this numerical model and validated by the DNS data. The results showed that DR effect increased with both the relaxation time λ and the maximum extensibility of molecule L. DR effect had an upper limit with the increasing of the maximum extensibility of molecule L. and the growth of relaxation time λ also could enhance that upper limit.