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METHOD AND APPARATUS FOR MEASURING APPARENT VISCOSITY OF A NON-NEWTONIAN FLUID
METHOD AND APPARATUS FOR MEASURING APPARENT VISCOSITY OF A NON-NEWTONIAN FLUID
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机译:测量非牛顿流体视粘度的方法和装置
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摘要
Method and apparatus are disclosed for measuring an apparent viscosity of a non-Newtonian fluid. The method and apparatus involves calculating a power-law number n relating a shear stress of the fluid to a shear rate of the fluid, and then calculating an estimated apparent viscosity Ŋest of the fluid at a selected shear rate based on a yield stress Y of the fluid and on the calculated power-law number n. The estimated apparent viscosity of the fluid at a selected shear rate is calculated based on the experimental observation that reference shear stress is 1.5 times the yield stress for most shear thinning fluids (e.g., grease).
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机译:公开了用于测量非牛顿流体的表观粘度的方法和设备。该方法和设备包括计算将流体的剪切应力与流体的剪切速率相关联的幂律数 n I>,然后在选定的剪切速率下计算流体的估计表观粘度Ŋest。基于流体的屈服应力Y和计算出的幂律数 n I>。在选定的剪切速率下,流体的估计表观粘度是根据实验观察值计算得出的,对于大多数剪切稀化流体(例如油脂),参考剪切应力是屈服应力的1.5倍。
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