A fluid is any substance that flows. Although it is usually a liquid or a gas, a granular solid or powder can behave as a fluid in certain processes such as fluidization. The study of fluids and fluid...A fluid is any substance that flows. Although it is usually a liquid or a gas, a granular solid or powder can behave as a fluid in certain processes such as fluidization. The study of fluids and fluid flow is its own branch of mechanics, and an active area of research. In this chapter and the next, we'll present a broad overview of the basics of fluid statics (stationary fluids) and fluid dynamics (fluids in motion).
A cylinder containing a fluid of mass density ρ is placed on the center of a phonograph turntable and rotated with constant angular velocity ω. The pressure is a function of height h and distance from...A cylinder containing a fluid of mass density ρ is placed on the center of a phonograph turntable and rotated with constant angular velocity ω. The pressure is a function of height h and distance from the axis r. The pressure at the surface of the fluid at the center of the cylinder (r = 0, h = h c ) is of course atmospheric pressure pa. If you want to learn more about the interesting subject of fluid flow, see the “Resources” section of this chapter.
