METHOD FOR FINDING SHEAR RATE OF FLUID, AND PROGRAM AND DEVICE FOR SAME
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United States of America Patent
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Dec 31, 2015
app pub date -
Feb 28, 2013
filing date -
Feb 28, 2013
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Abstract
Provided is a new method to obtain a shear rate of a fluid and Provided are a program and a device for the method. In the method, a pair of vibrators (1,1) are vibrated by an electromagnetic drive (2) and a viscosity of the sample liquid (9) is calculated by measuring a driving current of a coil (2b), which has a step (S1) of calculating the viscosity (η) of the sample liquid (9), a step (S2) of calculating a driving force (F) on a center of a wet part of the vibrator from the driving current (I), and a step (S3) of calculating a shear stress (S) exerted on the sample liquid from the driving force (F) and a liquid contact area of the vibrator (A), wherein the shear rate (D) is calculated from a ratio between the shear stress (S) and the viscosity (S4).
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