期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：227
期号：4
页码：042036
DOI：10.1088/1755-1315/227/4/042036
出版社：IOP Publishing
摘要：Numerical simulations of Cu/water nanofluid in a turbulent pipe flow are performed with considering the particle convection, diffusion, and coagulation. A general dynamic equation(GDE) of nanoparticles in a turbulent pipe flow has been derived with the Taylor Expansion Method of Moment (TEMOM) and the nanofluid flow in a horizontal circular tube has been simulated using the large eddy simulation (LES). The numerical results show the initial uniform distributions of particle volume concentration and size become non-uniform. The particle size increases with the development of coagulation process and the smaller diameter particles show more violent coagulation process inducing larger particle diameter growth rate . Because of the mixing of nanoparticles with short coagulation process and a paraboloid velocity distribution, the average size of particle at the tube center is smaller than that of near the wall.
