S1604-1-1 分子動力学法による狭いすきまの気体解析の試み(磁気ヘッド浮上位置決め制御技術)

概要

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In the present paper, we propose a modified Molecular Dynamics (MD) simulation method to analyze a gas flow in nanometer scale nanow area placed between walls. In the method, we use the difihise reflection model which assume that the wall is smooth and gas molecules reflect difihisely on the wall suifaces. This model is usually used in the direct simulation Monte Carlo (DSMC) method. Using the MD simulation method, the Couette flow problem, in which a gas flow is induced between two parallel plates separated by 10 nm and mnning opposite directions by 200m/s, is analyzed numeiically. Because the MD simulations are done by two dimensions as a first case, molecular number used in the MD simulation affects the flow velocity profile. A simulation case calculated using three molecules have good agreement with the flow velocity profile based on the Molecular Gas film Lubrication (MGL)theoiy It is eqectedthatagood result will be obtained by the MD simulation method extended to three dimensions.
2009-09-12