论文标题
复杂流体的宽带微变学的气泡动力学
Bubble dynamics for broadband microrheology of complex fluids
论文作者
论文摘要
在处理配方产品的处理中，复杂流体中的气泡通常是可取的，有时是不可避免的。气泡可能会因浮力，通过传质而生长或溶解，并很容易响应压力变化，从而对周围的复合体施加变形。半径变化的固定的球形气泡周围的变形场很简单且局部化，因此适合于流变学测量。本文回顾了通过分析气泡动力学来提取有关复杂流体流体流动性信息的新兴方法。重点是三个现象：通过传质，谐波振荡的变化，由声波驱动和气泡塌陷。这些现象涵盖了广泛的变形频率，从$ 10^{ - 4} $到$ 10^6 $ Hz，因此使用气泡作为活动探针铺平了宽带微流行病的道路。还讨论了需要克服实现强大技术的杰出挑战。
Bubbles in complex fluids are often desirable, and sometimes simply inevitable, in the processing of formulated products. Bubbles can rise by buoyancy, grow or dissolve by mass transfer, and readily respond to changes in pressure, thereby applying a deformation to the surrounding complex fluid. The deformation field around a stationary, spherical bubble undergoing a change in radius is simple and localised, thus making it suitable for rheological measurements. This article reviews emerging approaches to extract information on the rheology of complex fluids by analysing bubble dynamics. The focus is on three phenomena: changes in radius by mass transfer, harmonic oscillations driven by an acoustic wave, and bubble collapse. These phenomena cover a broad range of deformation frequencies, from $10^{-4}$ to $10^6$ Hz, thus paving the way to broadband microrheology using bubbles as active probes. The outstanding challenges that need to be overcome to achieve a robust technique are also discussed.
