Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, WB, India.
J Colloid Interface Sci. 2012 Apr 1;371(1):20-7. doi: 10.1016/j.jcis.2011.11.057. Epub 2012 Jan 10.
Nanometric silver dispersed water based nanofluids have been prepared by a single-step chemical process. The crystallite/particle size, morphology and purity of nanoparticles were characterized using standard microscopic, diffraction and spectroscopic techniques. The thermal conductivity enhancement (with respect to the base fluid) has been determined as a function of concentration and size of silver particles using transient hot-wire technique. The accurate fitting of the experimental data of thermal conductivity enhancement with a theoretical model developed by Patel et al. predicts that high specific surface area of the particles, layering at the liquid-solid interface and Brownian motion may be responsible for enhancement.
通过一步化学法制备了纳米银分散的水基纳米流体。采用标准的显微镜、衍射和光谱技术对纳米粒子的晶粒度/颗粒尺寸、形态和纯度进行了表征。采用瞬态热线技术，根据银颗粒的浓度和尺寸，测定了热导率增强（相对于基液）。通过 Patel 等人开发的理论模型对热导率增强的实验数据进行了精确拟合，预测高比表面积的颗粒、在固液界面的分层和布朗运动可能是增强的原因。
