Fluid-structure interaction in deformable microchannels
Fluid-structure interaction in deformable microchannels
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DOI：
10.1063/1.4759493
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发表时间：
2012-10-01
影响因子：
4.6
通讯作者：
Yeo, Leslie
中科院分区：
文献类型：
--
作者：
Chakraborty, Debadi;Prakash, J. Ravi;Yeo, Leslie
为了研究流动流体与可变形壁之间出现的复杂流体-结构相互作用，制造并建模了由单个微通道组成的聚二甲基硅氧烷微流体装置，该微通道具有沿着通道一侧的短长度上存在的薄柔性层。将薄层变形和压降的实验测量值与二维和三维计算模型的预测进行比较，这些模型对控制薄层和流体弹性的耦合方程组进行数值求解。结果表明，假设柔性薄层由无限宽的有限厚度弹性梁组成的二维模型合理地近似了三维模型，并且当薄层的宽度超过临界值（大约是薄层长度的两倍）时，与薄层轮廓的实验观察结果非常一致。 (C) 2012 年美国物理研究所。 [http://dx.doi.org/10.1063/1.4759493]
A polydimethylsiloxane microfluidic device composed of a single microchannel with a thin flexible layer present over a short length along one side of the channel was fabricated and modelled in order to investigate the complex fluid-structure interaction that arises between a flowing fluid and a deformablewall. Experimental measurements of thin layer deformation and pressure drop are compared with predictions of two- and three-dimensional computational models that numerically solve the coupled set of equations governing both the elasticity of the thin layer and the fluid. It is shown that the two-dimensional model, which assumes the flexible thin layer comprises an infinitely wide elastic beam of finite thickness, reasonably approximates a three-dimensional model, and is in excellent agreement with experimental observations of the thin layer profile when the width of the thin layer is beyond a critical value, roughly twice the length of the thin layer. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4759493]