Penetration efficiency of nanoparticles in a bend of circular cross-section

• Published in: Journal of hydrodynamics. Series B 2015-02, Vol.27 (1), p.93-98
• Main Authors: YIN, Zhao-qin, LIN, Jian-zhong, LOU, Ming
• Format: Article
• Language: English
• Subjects: bends; Dean number; Engineering; Engineering Fluid Dynamics; Hydrology/Water Resources; measurement; nanoparticle; Numerical and Computational Physics; penetration efficiency; Schmidt; Schmidt number; Simulation; 圆形; 弯曲角度; 弯曲长度; 横截面; 渗透效率; 纳米粒子; 纳米颗粒
• ISSN: 1001-6058; 1878-0342
• DOI: 10.1016/S1001-6058(15)60460-7

In order to quantify the losses of nanoparticles in a bend of circular cross-section, the penetration efficiency of nanoparticles of sizes ranging from 5.6 nm to 560 nm in diameter is determined as a function of the Dean number, the Schmidt number and the bend angle. It is shown that the effect of the Dean number on the penetration efficiency depends on the particle size. The Dean number has a stronger effect on the penetration efficiency for small particles than for large particles. There exists a critical value of the Dean number beyond which the penetration efficiency turns from increasing to decreasing with the increase of the Dean number, and this critical value is dependent on the particle size and the bend length. The penetration efficiency increases abruptly when the Schmidt number changes from 7 500 to 25 000. Finally, a theoretical relation between the penetration efficiency and the Dean number, the Schmidt number and the bend length is derived.