The entrapment/rejection process of spherical, rigid microparticles in elliptical, rough elastohydrodynamic contacts is modelled. An earlier model of the author is extended to include van der Waals intermolecular forces, in addition to mechanical (reaction and friction) and fluid–particle forces. Surface roughness effects are also introduced in terms of the intermolecular force formulation and in the microscale friction (particle–asperity) sub-model. Possibilities related to particle entry into a contact are quantified by weight factors and performance indices. A total entrapment index is defined and linked to the probability of particle entrapment. A parametric analysis investigates the effect of the intermolecular particle force on the entrapment probability by varying the contact load, lubricant viscosity, elastic modulus of the contacting solids, contact velocity and the macroscopic (Coulomb) coefficient of friction.

对椭圆形，粗糙的弹性流体动力接触中球形，刚性微粒的捕获/排斥过程进行了建模。作者的早期模型扩展到包括范德华力分子间力，以及机械力（反应力和摩擦力）和流体-粒子力。还根据分子间力公式和微尺度摩擦（颗粒-粗糙性）子模型引入了表面粗糙度效应。与颗粒进入接触有关的可能性通过重量因子和性能指数来量化。定义总包埋指数并将其与颗粒包埋的可能性联系起来。参数分析通过改变接触载荷，润滑剂粘度，