Mass transfer around spherical bubbles, drops, and solid particles in uniaxial and biaxial nonlinear extensional creeping flows at large Peclet numbers is the subject of this theoretical report. The fluid mechanics problem is governed by the viscosity ratio (λ) and the nonlinear intensity of the flow (E). The flow outside such bodies reveals a different picture than the linear case (E = 0) such as separating surfaces or closed circulations. There is a range: −1.04 < E < 0 (bubbles and drops) and −0.490 < E < 0 (particles) where the mass transfer rate is lower than the linear case. Outside these ranges, the mass transfer rate is higher than the linear case and in general it increases as |E| increases. Same mass transfer rates are expected in uniaxial and biaxial flows, except in the presence of external closed circulations where the biaxial flow overcomes the uniaxial flow. © 2018 American Institute of Chemical Engineers AIChE J, 65: 398–408, 2019

中文翻译：

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在单轴和双轴非线性扩展流中，气泡，液滴和粒子周围的质量传递

在大Peclet数下，单轴和双轴非线性拉伸蠕变流中的球形气泡，液滴和固体颗粒周围的传质是该理论报告的主题。流体力学问题由粘度比（λ）和流动的非线性强度（E）决定。这种物体外部的流动显示出与线性情况（E  = 0）不同的图像，例如分开的表面或封闭的循环。有一个范围：−1.04 <  E  <0（起泡和掉落）和−0.490 <  E  <0传质速率低于线性情况的粒子（颗粒）。在这些范围之外，传质速率高于线性传递速率，并且通常随着||的增加而增加。E | 增加。在单轴和双轴流中，期望的传质速率相同，除非存在外部封闭循环，其中双轴流克服了单轴流。©2018美国化学工程师学会AIChE J，65：398–408，2019