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中文摘要：
固壁表面发生的冷凝过程在工程应用中广泛存在，本文采用非平衡分子动力学模拟方法对高温蒸气在低温壁面上发生的冷凝过程进行了模拟研究。着重对该过程中的密度和局部温度等热力学参数分布进行了研究。同时，考察了两种气固温差条件下，壁面内、外法线方向上，不同强度的外力场对冷凝过程的影响，得到了结论：外力场是壁面内法线方向时促进冷凝进行，反之则阻碍冷凝进行，力场强度越大则影响效果越显著；当外力场一定时，气固温差越小，则外力场的相对影响程度越大。
英文摘要：
The condensation process of the vapor at high temperature on a solid surface at low temperature, which is widely utilized in engineering application, was simulated and studied with non- equilibrium molecular dynamics simulation method in this paper. The profiles of the density and the local temperature were obtained and analyzed： The effects of the external force field perpendicular to the solid surface and the temperature difference on the condensation were also observed. The results show that when the external force is normal to and towards the surfacer the condensation will be strengthened, and vice versa. The condensation is affected more markedly with the increase of the external force at constant temperature difference or with the decrease of the temperature difference in constant external force field.
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