Centre of Pressure

Definition - What does Centre of Pressure mean?

Centre of Pressure is the point at which the total pressure fields act on a body and cause a force that acts through that point. The total force vector that acts at the point is described as a value of integrated vectorial pressure fields. The location of the point and the resultant force produce an equivalent moment which forces the body to its original pressure field. It is generally defined as an average location or point of all pressures that act upon the body which moves through a fluid.

Petropedia explains Centre of Pressure

Centre of Pressure is used in the design of sailboats for representing the position on sail at which aerodynamic force gets concentrated. When an aircraft starts moving through the atmosphere, the velocity of air differs around the aircraft's surface. It can be located on the body but in case of fluid flows, the pressure fields apply a moment on the body of a magnitude that makes the location of the Centre of Pressure outside the body. The determination of the Centre of Pressure is a complex procedure as the pressure around the body changes and thus it never remains in a constant location.

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