In fluid dynamics, drag, sometimes referred to as fluid resistance, is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid. [1] . This can exist between two fluid layers, two solid surfaces, or between a fluid and a solid surface.

Feb 2, 2023 · What is Drag Force. The resistance offered by a fluid, like air and water, is called the drag force or drag when an object moves through it. It acts in a direction opposite to the object’s motion. It is generated by the relative velocity between the solid object and the fluid.

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.

Jul 21, 2022 · Drag is the aerodynamic force that opposes an aircraft’s motion through the air. Drag is generated by every part of the airplane (even the engines!). How is drag generated? Drag is a mechanical force. It is generated by the interaction and contact of a …

When a solid body interacts with a fluid (liquid or gas), a drag force is produced on the solid body. Drag forces are not created by any force fields. In order to experience a drag force, an object has to come into physical contact with the fluid medium.

Jul 20, 2022 · When a solid object moves through a fluid it will experience a resistive force, called the drag force, opposing its motion. The fluid may be a liquid or a gas. This force is a very complicated force that depends on both the properties of the object and the properties of the fluid.

Mar 16, 2025 · Definition: Drag Force. Drag force \(F_D\) is proportional to the square of the speed of the object. Mathematically, \[F_{D} = \frac{1}{2} C \rho A v^{2},\] where \(C\) is the drag coefficient, \(A\) is the area of the object facing the fluid, and \(\rho\) is the density of the fluid.