纳米悬浮液的有效导热系数  

Effective thermal conductivity of nanoparticles suspension

作　　者：向军[1] 李菊香[1] 

机构地区：[1]南京工业大学能源学院,南京210009

出　　处：《低温与超导》2009年第1期59-62,66,共5页Cryogenics and Superconductivity

基　　金：江苏省自然科学基金项目(BK2004214)资助

摘　　要：文中以有效介质近似理论为基础,考虑了纳米颗粒在基液中强烈的B rown ian运动对强化传热的作用和纳米颗粒的表面吸附液体层、纳米颗粒的粒径和体积分数对纳米悬浮液有效导热系数的影响,建立了预测纳米悬浮液有效导热系数的模型,通过对纳米CuO-去离子水溶液的验证,发现该模型比几种经典模型具有更高的精度,因此具有一定的参考价值。In this paper, a new model to calculate the effective thermal conductivity of the nanoparticles suspension was presented which considered the heat transfer enhancement caused by the Brownian motion of nanoparticles, the liquid adsorbing layer on the surface of the nanoparticles, the size and volume concentration of nanoparticles on the basis of the effective medium approximation theory. Compared with the tests and some traditional models to CuO - DW nanofluids, this new model had a higher accuracy in predicting the effective thermal conductivity than the traditional ones.

关 键 词：纳米颗粒悬浮液 有效导热系数 有效介质近似 BROWNIAN运动 

分 类 号：O211.6[理学—概率论与数理统计] TK124[理学—数学]