Testing the viscosity of ketchup8/22/2023 ![]() In nature the fluids found are mainly non Newtonian fluids and therefore it becomes very essential to find their viscosity. they do not follow newton’s law of viscosity. The viscosity of Non Newtonian fluids is difficult to determine as the shear rate is not proportional to the strain rate i.e. The viscosity of Newtonian fluids are easy to calculate as there are many instruments which provide direct value of viscosity. These methods generally have been developed around Newton’s law of viscosity and it’s assumptions that viscosity is independent of rate of shear. Efficient method are developed for measuring the viscosity of liquids. Viscosity is one of the important properties that must be dealt with in many liquid flow problems. This paper reviews the theory of co-axial concentric rotational viscometer.
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