Who created the drag equation?

In the 19th century the Navier–Stokes equations for the description of viscous flow were developed by Saint-Venant, Navier and Stokes. Stokes derived the drag around a sphere at very low Reynolds numbers, the result of which is called Stokes’ law.

Which Newton’s law is drag force?

Newton’s second law
Some interesting situations connected to Newton’s second law occur when considering the effects of drag forces upon a moving object.

How do you find the drag form?

The drag equation states that drag D is equal to the drag coefficient Cd times the density r times half of the velocity V squared times the reference area A. For given air conditions, shape, and inclination of the object, we must determine a value for Cd to determine drag.

How is drag force related to Reynolds number?

As the Reynolds number increases, the viscous forces decrease relative to the inertial forces (and therefore relative to the pressure gradient), so the point of separation moves upstream, towards the equator. As the Reynolds number is increased, the form drag increases relative to the skin fric- tion.

How is drag coefficient derived?

The drag coefficient Cd is equal to the drag D divided by the quantity: density r times half the velocity V squared times the reference area A. The drag coefficient then expresses the ratio of the drag force to the force produced by the dynamic pressure times the area.

Is drag force conservative?

Like friction, drag is a non-conservative force, meaning the work done by it is path dependent. And also like friction, drag produces heat and thus does not conserve mechanical energy.

What causes form drag?

Form Drag, also known as Pressure Drag or Profile Drag, is the drag caused by the separation of the boundary layer from a surface and the wake created by that separation.

Is air resistance the same as drag?

By definition, air resistance describes the forces that are in opposition to the relative motion of an object as it passes through the air. In terms of aerodynamics and flight, drag refers to both the forces acting opposite of thrust, as well as the forces working perpendicular to it (i.e. lift).