Lattice Boltzmann simulations of micron-scale drop impact on dry surfaces
Lattice Boltzmann simulations of micron-scale drop impact on dry surfaces
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DOI：
10.1016/j.jcp.2010.07.007
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发表时间：
2010-10
期刊：
影响因子：
--
通讯作者：
Taehun Lee;Lin Liu
中科院分区：
文献类型：
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作者：
Taehun Lee;Lin Liu
提出了一种用于不可压缩二元流体的格子Boltzmann方程（LBE）方法，用于模拟部分润湿表面上的接触线动力学。壁面和流体之间的分子间相互作用通过在总自由能的表达式中包含立方壁面能来表示。所提出的边界条件消除了接触线附近的寄生电流。LBE方法适用于干燥表面上的微米级液滴冲击，这在按需喷墨应用中通常会遇到。为了与已有的实验结果进行比较[H. Dong，W. W. D.G.卡尔巴克纳尔Morris，Temporally-resolved inkjet drop impaction on surfaces，AIChE J.53（2007）2606-2617]，计算在31°至107°的平衡接触角范围内进行，固定密度比为842，粘度比为51，Ohnesorge数（Oh）为0.015，以及两个Weber数（We）为13和103。
A lattice Boltzmann equation (LBE) method for incompressible binary fluids is proposed to model the contact line dynamics on partially wetting surfaces. Intermolecular interactions between a wall and fluids are represented by the inclusion of the cubic wall energy in the expression of the total free energy. The proposed boundary conditions eliminate the parasitic currents in the vicinity of the contact line. The LBE method is applied to micron-scale drop impact on dry surfaces, which is commonly encountered in drop-on-demand inkjet applications. For comparison with the existing experimental results [H. Dong, W.W. Carr, D.G. Bucknall, J.F. Morris, Temporally-resolved inkjet drop impaction on surfaces, AIChE J. 53 (2007) 2606–2617], computations are performed in the range of equilibrium contact angles from 31° to 107° for a fixed density ratio of 842, viscosity ratio of 51, Ohnesorge number (Oh) of 0.015, and two Weber numbers (We) of 13 and 103.