👉 The Ks fluid, also known as Knudsen fluid, is a theoretical model used to describe the behavior of gas molecules in extremely low-density environments where classical fluid dynamics fails. In such conditions, gas molecules collide more frequently with the walls of their container than with each other, leading to a departure from the assumptions of continuum mechanics. The Ks fluid theory accounts for these unique interactions, where the gas exhibits non-continuum behavior, including phenomena like slip flow at the boundaries and deviations from ideal gas laws. This model is crucial for understanding and predicting the behavior of gases in space, nanoscale devices, and other low-density systems where classical theories are inadequate.
