切向动量协调系数(TMAC)是描述气体滑移流动的重要边界条件.运用非平衡分子动力学方法,构建了能够反映流体粒子与壁面粒子相互作用关系的物理模型.结果显示:当壁面存在吸附层或壁面无气体吸附层时,同一势能强度下TMAC值都随着温度的升高而降低;而在吸附层能够解吸附的温度,TMAC值发生突跃.在本文的模拟条件下,气体粒子离开壁面吸附的能力和壁面粒子及吸附层粒子热运动产生的粗糙度决定了TMAC值的分布.
参考文献
| [1] | Maurer J.;Tabeling P.;Joseph P.;Willaime H. .Second-order slip laws in microchannels for helium and nitrogen[J].Physics of fluids,2003(9):2613-2621. |
| [2] | Arkilic EB.;Schmidt MA.;Breuer KS. .Mass flow and tangential momentum accommodation in silicon micromachined channels[J].Journal of Fluid Mechanics,2001(0):29-43. |
| [3] | Tekasakul P.;Tompson RV.;Loyalka SK.;Bentz JA. .THE SPINNING ROTOR GAUGE - MEASUREMENTS OF VISCOSITY, VELOCITY SLIP COEFFICIENTS, AND TANGENTIAL MOMENTUM ACCOMMODATION COEFFICIENTS[J].Journal of Vacuum Science & Technology, A. Vacuum, Surfaces, and Films,1996(5):2946-2952. |
| [4] | 徐超,何雅玲,王勇.纳米通道滑移流动的分子动力学模拟研究[J].工程热物理学报,2005(06):912-914. |
| [5] | 蒋开,陈云飞,庄苹,杨决宽,唐明兵.纳米尺度边界滑移的分子动力学模拟研究[J].摩擦学学报,2005(03):238-242. |
| [6] | Thompson PA. Troian SM. .A GENERAL BOUNDARY CONDITION FOR LIQUID FLOW AT SOLID SURFACES[J].Nature,1997(6649):360-362. |
| [7] | 解辉,刘朝,刘彬武.纳米通道内混合气体流动的分子动力学模拟[J].物理化学学报,2009(05):994-998. |
| [8] | 解辉,刘朝.纳米通道内表面浸润性对气泡的作用[J].物理化学学报,2009(12):2537-2542. |
| [9] | Gaurav Arya;Hsueh-Chia Chang;Edward J. Maginn .Molecular Simulations of Knudsen Wall-slip: Effect of Wall Morphology[J].Molecular simulation,2003(10/11):697-709. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%