WandSchubspannung

WandSchubspannung, also known as wall shear stress, is a fundamental concept in fluid dynamics and biomechanics, referring to the force exerted by a fluid on a surface per unit area. It is a vector quantity, with both magnitude and direction, and is typically measured in pascals (Pa) or dynes per square centimeter (dyn/cm²).

In fluid dynamics, wall shear stress is crucial for understanding the behavior of fluids in pipes, channels, and around immersed bodies. It is a key factor in determining the friction drag experienced by an object moving through a fluid. The magnitude of wall shear stress is influenced by the fluid's viscosity, velocity profile, and the roughness of the surface.

In biomechanics, wall shear stress plays a significant role in understanding blood flow in vessels. It is a critical factor in the development of atherosclerosis, as high wall shear stress can damage the endothelial lining of blood vessels, leading to the formation of plaques. Conversely, low wall shear stress can also be detrimental, as it can lead to the stagnation of blood flow and the formation of blood clots.

The concept of wall shear stress is also relevant in other fields, such as aerodynamics and geophysics. In aerodynamics, it is used to understand the forces acting on aircraft wings and other surfaces. In geophysics, it is used to study the movement of fluids in the Earth's crust and mantle.