Linear viscoelastic analysis using frequency-domain algorithm on oscillating circular shear flows for bubble suspensions
Linear viscoelastic analysis using frequency-domain algorithm on oscillating circular shear flows for bubble suspensions
复制标题
使用频域算法对气泡悬浮液的振荡圆形剪切流进行线性粘弹性分析
DOI：
10.1007/s00397-018-1074-z
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发表时间：
2018
期刊：
影响因子：
2.3
通讯作者：
Y.Murai
中科院分区：
文献类型：
--
作者：
Y.Tasaka;T.Yoshida;R.Rapberger;Y.Murai
针对传统流变仪难以从具有气泡变形的流变性的空间分布来评价气泡悬浮液的线性粘弹性，提出了一种基于超声速度剖面(UVP)获得的时空速度数据的新型流变仪。采用频域算法来克服测量噪声对流变学评估的严重影响，该影响是通过离散形式的运动方程从误差传播特性推断出来的。用两种流体：高粘度原油作为牛顿流体和聚丙烯酰胺水溶液作为剪切变稀粘弹性流体，验证了频域算法流变学的适用性和优越性。最后将该流变仪应用于高剪切振动的气泡悬浮液，可以有效地提取弹性动量传递随空间的变化。
To achieve a stable evaluation of the linear viscoelasticity of bubble suspensions, which have difficulties for conventional rheometers from spatial distributions of rheological properties with bubble deformations, we proposed a novel rheometry based on spatio-temporal velocity data obtained by ultrasonic velocity profiling (UVP). A frequency-domain algorithm was adopted to overcome a critical influence of measurement noise on the rheological assessment, which is inferred from error propagation characteristics through the equations of motion in discretized form. Applicability and advantage of the present rheometry with the frequency-domain algorithm were verified by two kinds of fluids: high viscous oil as a Newtonian fluid and polyacrylamide aqueous solution as a shear thinning, viscoelastic fluid. The rheometry was finally adopted for bubble suspensions subject to high oscillatory shear, and it could validly extract elasticity-originated momentum transfer as a function of space.
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影响因子：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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