Non-Newtonian Fluid

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Non-Newtonian fluid
A non-Newtonian fluid is a fluid in which the viscosity changes with the applied strain rate. As a result, non-Newtonian fluids may not have a well-defined viscosity.Although the concept the of viscosity is commonly used to characterize a material, it can be inadequate to describe the mechanical behavior of a substance, particularly non-Newtonian fluids. They are best studied through several other rheological properties which relate the relations between the stress and strain tensors under many different flow conditions, such as oscillatory shear, or extensional flow which are measured using different devices or rheometers. The properties are better studied using tensor-valued constitutive equations, which are common in the field of continuum mechanics.
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Nichtnewtonsches Fluid
Als nichtnewtonsches Fluid bezeichnet man im Gegensatz zum newtonschen Fluid ein Fluid, dessen Viskosität nicht konstant bleibt, wenn sich die auf dasselbe einwirkenden Scherkräfte verändern. Damit entspricht dieses Fluid nicht dem newtonschen Elementargesetz der Zähigkeitsreibung. Dieses Verhalten wird auch als anomalviskos bezeichnet.
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Plyn nienewtonowski
Płyn nienewtonowski w przeciwieństwie do płynu newtonowskiego, nie spełnia prawa Newtona. Lepkość płynów nienewtonowskich nie jest wartością stałą w warunkach izobarycznych, jej wartość zmienia się w czasie. Zgodnie z tą definicją krzywa płynięcia takiego płynu nie jest funkcją liniową (patrz płyn newtonowski).
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Fluido non newtoniano
Si definisce non newtoniano un fluido la cui viscosità varia a seconda della velocità con cui la si misura. I fluidi non newtoniani si dividono in due classi: fluidi pseudoplastici: la viscosità diminuisce all'aumentare della velocità a cui la si misura.fluidi dilatanti: la viscosità aumenta all'aumentare della velocità a cui la si misura.
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Fluido não-newtoniano
Um fluido não-newtoniano é um fluido cuja viscosidade varia de acordo com o grau de deformação aplicado. Como conseqüência, fluidos não-newtonianos podem não ter uma viscosidade bem definida. A viscosidade de tais fluidos não é constante.
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