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No-Slip Hydrodynamic Boundary Condition for Hydrophilic Particles

机译:亲水性颗粒的防滑流体动力边界条件

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We describe measurement and interpretation of the force acting on a smooth hydrophilic glass particle during rapid (1-100 μms~(-1)) approach to, and separation from, a hydrophilic glass plate in viscous concentrated aqueous sucrose solutions (0.001 Pa s < η < 0.090 Pa s). We find that the force is accurately described by Reynolds lubrication theory with a no-slip boundary condition, even at maximum strain rates of up to 250 000 s~(-1). Compared to earlier studies of hydrodynamic forces on small particles, we reduce the uncertainty in the absolute particle-plate separation by using an evanescent-wave measurement of the separation.
机译:我们描述了在粘性浓缩蔗糖水溶液(0.001 Pa s <(1-100μms〜(-1))快速接近亲水玻璃板并从亲水玻璃板分离过程中作用于光滑亲水玻璃颗粒上的力的测量和解释。 η<0.090Pa·s)。我们发现,即使在最大应变速率不超过250000 s〜(-1)的情况下,雷诺润滑理论也能在无滑移边界条件下准确描述力。与早期对小颗粒的流体动力的研究相比,我们通过使用van逝波测量分离来减少绝对颗粒-板分离的不确定性。

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