NichtNewtonisch

"NichtNewtonisch" is a term used in the field of fluid dynamics to describe fluids that do not adhere to Newton's law of viscosity. Newton's law states that the shear stress of a fluid is proportional to the rate of strain, meaning that the viscosity of the fluid is constant, regardless of the rate of shear. In contrast, nichtNewtonische fluids exhibit a viscosity that changes with the rate of shear, making them more complex to model and analyze.

There are two main types of nichtNewtonische fluids: shear-thinning (or pseudoplastic) fluids and shear-thickening (or dilatant) fluids. Shear-thinning fluids, such as paint or ketchup, become less viscous as the rate of shear increases. This behavior is often desirable in applications where the fluid needs to flow easily under high shear conditions, such as in the nozzle of a spray can or the tip of a brush. On the other hand, shear-thickening fluids, like quicksand or some types of suspensions, become more viscous as the rate of shear increases. This behavior can be beneficial in applications where the fluid needs to resist flow under high shear conditions, such as in the design of protective gear or in the formulation of drilling muds.

The study of nichtNewtonische fluids is important in various fields, including materials science, chemical engineering, and biomechanics. Understanding the behavior of these fluids can help in the development of new materials, the optimization of industrial processes, and the design of medical devices. However, the complex nature of nichtNewtonische fluids also presents challenges in their modeling and analysis, requiring advanced mathematical techniques and computational tools.