Vortex-Induced Vibration of a Cylinder in Inelastic Shear-Thinning and Shear-Thickening Fluids.
Vortex-Induced Vibration of a Cylinder in Inelastic Shear-Thinning and Shear-Thickening Fluids.
复制标题
非弹性剪切稀化和剪切增稠流体中圆柱体的涡激振动。
DOI：
10.1017/jfm.2021.1151
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发表时间：
2022
影响因子：
3.7
通讯作者：
Modarres-Sadeghi, Y.
中科院分区：
文献类型：
--
作者：
Patel, U.N.;Rothstein, J.P.;Modarres-Sadeghi, Y.
牛顿流体中圆柱体的涡激振动 (VIV) 是流固耦合中的一个模型问题，已得到广泛研究。在这项工作中，我们研究了剪切稀化和剪切增稠流体对一自由度柔性安装圆柱体的 VIV 响应的影响。我们考虑质量比为 的系统，对于剪切稀化、剪切增稠和牛顿流体，响应幅度保持非常相似。尽管存在这种相似性，但观察到的远尾流是不同的：剪切稀化放大了涡量的产生并减少了尾流的范围，而剪切增厚限制了涡量的产生并延长了尾流。我们的研究结果表明，在放置于剪切稀化或剪切增稠流体中的圆柱体附近观察到的局部表观粘度决定了圆柱体的 VIV 响应。
Vortex-induced vibrations (VIV) of a cylinder in a Newtonian fluid is a model problem in fluid–structure interactions and has been studied extensively. In this work, we study the influence of shear-thinning and shear-thickening fluids on the VIV response of a one-degree-of-freedom flexibly-mounted cylinder. We consider a system with a mass ratio of , the amplitude of response stays very similar for the shear-thinning, shear-thickening and Newtonian fluids. Despite this similarity, the observed far wake is different: shear thinning amplifies the generation of vorticity and reduces the extent of the wake, whereas shear thickening limits the generation of vorticity and extends the wake. Our findings show that the local apparent viscosity observed close to the cylinder placed in shear-thinning or shear-thickening fluids governs the VIV response of the cylinder.