首页|期刊导航|哈尔滨工业大学学报（英文版）|Fully Developed Turbulence of Power-Law Fluids in Circular Pipe Based on Large Eddy Simulation
哈尔滨工业大学学报（英文版）2021，Vol.28Issue(4)：67-76,10.
Fully Developed Turbulence of Power-Law Fluids in Circular Pipe Based on Large Eddy Simulation
Fully Developed Turbulence of Power?Law Fluids in Circular Pipe Based on Large Eddy Simulation
摘要
Abstract
In this study, Large eddy simulation ( LES) of the fully developed turbulence of power?law fluids in a circular pipe was performed using the dynamic subgrid?scale model. Under a specific Reynolds number, the flow information of three fluids with a range of power?law indexes was obtained. The trends of the mean axial velocity and the normalized apparent viscosity were analyzed. Simulation results show that shearing?thinning fluid displayed more noticeable non?Newtonian characteristics than shear?thickening fluid. The predicted friction factors were approximately equal to the Dodge and Metzner correlation and Gomes correlation. The peak values of root mean squares ( RMS) and Reynolds stress increased as the power?law index increased. The turbulence statistics ( skewness and flatness ) from the wall to the pipe center were calculated. From the calculated results, the velocity fluctuation near the wall had strong intermittent and asymmetry. As demonstrated by the contours of the normalized instantaneous axial velocity and viscosity, the turbulence was more developed as the power?law index increased. It is concluded that the LES is feasible to predict the turbulence of pipe flow under higher Reynolds numbers.关键词
Large eddy simulation/power⁃law fluids/fully developed turbulenceKey words
Large eddy simulation/power⁃law fluids/fully developed turbulence分类
数理科学引用本文复制引用
Shuyan Wang,Miao Li,Shuqing Wang,Haoting Li,Yujia Chen,Yimei Ma,Qiji Sun..Fully Developed Turbulence of Power-Law Fluids in Circular Pipe Based on Large Eddy Simulation[J].哈尔滨工业大学学报（英文版）,2021,28(4):67-76,10.基金项目
Sponsored by the National Natural Science Foundation of China(Grant Nos.51876032,21676051),the Natural Science Foundation of Heilongjiang Province(Grant No.ZD2019E002). （Grant Nos.51876032,21676051）
