Effects of instrument and fluid inertia in oscillatory shear in rotational rheometers
Effects of instrument and fluid inertia in oscillatory shear in rotational rheometers
复制标题
旋转流变仪中仪器和流体惯性对振荡剪切的影响
DOI：
10.1122/1.4944512
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发表时间：
2016
影响因子：
3.3
通讯作者：
H. Stettin
中科院分区：
文献类型：
--
作者：
J. Läuger;H. Stettin
在组合式电机传感器（CMT）设计中，扭矩是在移动表面测量的，仪器移动部件的惯性矩和流体惯性可能会影响测量结果，而在单独的电机传感器（SMT）设置中，只有流体惯性效应可能会起作用。为了研究惯性效应，振荡剪切测量已经进行了各种牛顿液体具有不同的测量几何形状和在CMT和SMT设置低粘度。对于CMT的情况下，它表明，与适当的控制机制，考虑到仪器的惯性可靠的结果可以实现相当高的比例的加速度样本扭矩。此外，牛顿液体的测量数据与根据Schrag [Trans. Soc. Rheol. 21，399-413（1977）]。SMT设置的结果表明，对于任何给定的几何形状，流体惯性效应，当未校正时，导致…
In a combined motor transducer (CMT) design, the torque is measured at the moving surface and the moment of inertia of the moving parts of the instrument and the fluid inertia might influence the measurement results, whereas in a separate motor transducer (SMT) setup only fluid inertia effects might come into play. In order to investigate inertia effects, oscillatory shear measurements have been performed on various Newtonian liquids with low viscosity with different measuring geometries and in a CMT and a SMT setup. For a CMT situation, it is shown that with an appropriate control mechanism, taking into account the instrument inertia reliable results can be achieved up to rather high ratio of acceleration to sample torque. Further, the measuring data on the Newtonian liquid agree well with the fluid inertia calculations following the approach from Schrag [Trans. Soc. Rheol. 21, 399–413 (1977)]. The results for a SMT setup show that for any given geometry, fluid inertia effects, when uncorrected, lead to ...