To analyze the behavior of the fluid and how it interacts with solid boundaries, viscosity is utilized. In these applications, the fluid may be in motion or at rest. In daily life, we encounter several applications where fluid is involved. In this article, we will explore viscosity, with a focus on the kinematic viscosity of fluids, gases, and air. For example, the kinematic viscosity of air can be determined if the dynamic viscosity and density are known. The viscosity can be described using dynamic viscosity or kinematic viscosity. Viscosity is an important property of fluids. The shape and speed of the bullet, the mass of gas displaced by the bullet, the compressibility of air, and the viscosity of air are all factors that influence the aerodynamic forces generated. The magnitude of the aerodynamic forces generated depends on the properties of the air and the bullet. We see the air near the bullet become disturbed and move around the bullet, and there are aerodynamic forces generated between the air and the bullet. Imagine a slow-motion video of a bullet passing through the air. Viscosity is an important property of fluids The kinematic viscosity of air at 15℃ is 1.48 x 10-5 m2/s or 14.8 cSt.
The SI unit of kinematic viscosity is m2/s. Two different fluids can have the same absolute or dynamic viscosity, but never the same kinematic viscosity.
