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Definition: DRAG FORCE. Drag Force \(F_D\) is found to be proportional to the square of the speed of the object. Mathematically \[F_D\propto v^2 \] \[F_D = \dfrac{1}{2} C_{\rho} Av^2, \] where \(C\) is the drag coefficient \(A\) is the area of the object facing the fluid, and \(\rho\) is the density of the fluid.
- 6.7: Drag Force and Terminal Speed
Definition: Drag Force. Drag force FD F D is proportional to...
- 6.7: Drag Force and Terminal Speed
Drag force is a function of shape geometry, velocity of the moving fluid over a stationary shape, and the fluid properties density and viscosity. It can be calculated using the following equation, = Equation 1: Drag force equation using total profile. where . ρ is density determined from Table A.9 or A.10 in your textbook.
Definition: Drag Force. Drag force FD F D is proportional to the square of the speed of the object. Mathematically, FD = 1 2CρAv2, (6.7.2) (6.7.2) F D = 1 2 C ρ A v 2, where C C is the drag coefficient, A A is the area of the object facing the fluid, and ρ ρ is the density of the fluid.
Express the drag force mathematically; Describe applications of the drag force; Define terminal velocity; Determine an object’s terminal velocity given its mass
What does this equation tell us? It simply says that the drag force F1 is proportional to the velocity and that the force points in the direction opposite to the velocity, so that the force always opposes the motion of the object. (Recall that ˆv is a unit vector in the direction of the velocity.)
‐ The drag force. (or simply drag) acts in the direction of the upstream velocity. ‐ The lift force. (or simply lift) acts normal to the flow direction. In 3D flows, there could also be a side force component acting in the direction normal to lift – drag plane.
The drag force and lift force calculations can be done using the following basic formula: >]=h]∙ 1 2 ∙iKOj > f=h f∙ 1 2 ∙iKOj where; >]= Drag Force > f= Lift Force h]= Coefficient of Drag h f= Coefficient of Lift i= Density of fluid K= Area O= Velocity of fluid The value of the area, K , will change according to the conditions and ...
