# drag coefficient

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Related to drag coefficient: Drag force

## drag coefficient

[′drag ‚kō·i′fish·ənt]
(fluid mechanics)
A characteristic of a body in a flowing inviscous fluid, equal to the ratio of twice the force on the body in the direction of flow to the product of the density of the fluid, the square of the flow velocity, and the effective cross-sectional area of the body.

## drag coefficient A typical drag coefficient curve of an airfoil.
i. Nondimensional coefficient equal to total drag divided by ¼ ρ V2S, where ρ is density, V is indicated air speed, and S is surface area of the body.
ii. A coefficient representing the drag on a given airfoil or other body or a coefficient representing a particular element of drag.
References in periodicals archive ?
The objective is to accurately calculate the pressure field in order to obtain both lift and drag coefficients, keeping in mind the crucial importance of capturing the boundary layer separation accurately, as this is the point before which the maximum lift coefficient is determined.
In summary, three drag coefficient approaches are used: a drift-velocity approach named DVA, an existing drag coefficient approach DCA, and the proposed drag coefficient approach [DCA.sup.*] (see Figure 1).
The inputs are same as those of RGF, while the outputs are lift and drag coefficients. Therefore, the function of this model can be depicted as
Principally, this paper investigates the influence of buoyancy and channel confinement on recirculation length, drag coefficient, Strouhal number, and heat transfer rate.
To take the particle shape in the equation of motion into account, the drag coefficient [c.sub.d] has to be specified.
Where [C.sub.d] is a drag coefficient and a function of the Reynolds number.
Because of the significant difference in particle geometry and thus in drag coefficient between oil shale ash and FCC fine catalyst, the inlet velocity producing the balance between the above effects for oil shale ash is smaller than that for FCC fine catalyst, as observed in our experiment.
L/D ratio: From the Lift and Drag coefficients plots following results are generated.
The predictions from the two such models were compared with experimental data for a real model of BMW 5-series which has a drag coefficient of 0.27 .
where [F.sub.D], [F.sub.L], and [M.sub.Z] are the drag force, the lift force, and the torsional moment, respectively; [C.sub.D], [C.sub.L], and [C.sub.M] are the drag coefficient, the lift coefficient, and the moment coefficient, respectively; Lis the models' reference length (L - 1400 mm); d is the diameter of naked conductor; V is wind velocity (V - 20 m/s); and p is the air density.
We compare the vibration amplitude, lift coefficient, and drag coefficient of the bare cylinder with the cylinder with the plate.
where [L.sub.c] represents average trajectory length of the subject pedestrian demand (m); [L.sub.0] is crosswalk length (m); [mathematical expression not reproducible] is adjusted drag coefficient; [u.sub.0] represents average speed of discharge pedestrians (m/s); w represents the crosswalk width (m); [P.sub.2] represents the number of subject pedestrians.

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