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The force on an object that resists its motion through a fluid is called drag. When the fluid is a gas like air, it is called aerodynamic drag or air resistance. When the fluid is a liquid like water it is called hydrodynamic drag, but never "water resistance". Fluids are characterized by their ability to flow.
15 Ιουλ 2024 · The drag equation states that drag D is equal to the drag coefficient Cd times the density rho (ρ) times half of the velocity V squared times the reference area A. \(\LARGE D=Cd\cdot\frac{\rho\cdot V^2\cdot A}2\)
In fluid dynamics, the drag equation is a formula used to calculate the force of drag experienced by an object due to movement through a fully enclosing fluid. The equation is: F d = 1 2 ρ u 2 c d A {\displaystyle F_{\rm {d}}\,=\,{\tfrac {1}{2}}\,\rho \,u^{2}\,c_{\rm {d}}\,A} where
In aerodynamics, aerodynamic drag, also known as air resistance, is the fluid drag force that acts on any moving solid body in the direction of the air's freestream flow. [23] From the body's perspective (near-field approach), the drag results from forces due to pressure distributions over the body surface, symbolized .
22 Νοε 2023 · The drag equation states that drag D is equal to the drag coefficient Cd times the density rho (ρ) times half of the velocity V squared times the reference area A. D = Cd ⋅ ρV2 2 A. Determining Drag. For given air conditions, shape, and inclination of the object, we must determine a value for Cd to determine drag.
Aerodynamic shaping of an automobile can reduce the drag force and thus increase a car’s gas mileage. The value of the drag coefficient \(C\) is determined empirically, usually with the use of a wind tunnel (Figure \(\PageIndex{1B}\)).
21 Ιαν 2023 · The drag equation states that drag (D) is equal to a drag coefficient (Cd) times the density of the air (r) times half of the square of the velocity (V) times the wing area (A). D = .5 * Cd * r * V^2 * A. In general, the dependence on body shape, inclination, air viscosity, and compressibility is very complex.
