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在考虑分子间作用力的基础上,讨论了各向同性壁面对微流道内非极性分子液体表观黏性系数的影响,建立了考虑壁面影响的表观黏性系数分子理论公式.研究结果显示,在靠近壁面处,壁面对表观黏性系数的影响是很大的,这取决于壁面材料和流体介质的分子间作用力.随着离开壁面距离的增加,壁面对表观黏性系数的影响衰减很快.在液态氩为流体介质的条件下,壁面影响大约可涉及到第10层氩分子,即影响深度为4nm左右.
Based on the intermolecular forces, the influence of isotropic wall on the apparent viscosity of non-polar molecules in microchannels was discussed, and the theoretical formula of apparent viscosity coefficient was established. The results It is shown that the influence of the wall surface on the apparent viscosity coefficient is very large near the wall, which depends on the intermolecular force between the wall material and the fluid medium. As the distance from the wall increases, the apparent viscosity coefficient Of the impact of decay quickly in the liquid argon fluid medium conditions, the wall impact can be about the first layer of argon molecules, which affect the depth of about 4nm.