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About: Dynamic pressure     Goto   Sponge   NotDistinct   Permalink

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In fluid dynamics, dynamic pressure (denoted by q or Q and sometimes called velocity pressure) is the quantity defined by: where (in SI units): * q is the dynamic pressure in pascals (i.e., kg/m⋅s2), * ρ is the fluid mass density (e.g. in kg/m3), and * u is the flow speed in m/s. It can be thought of as the fluid's kinetic energy per unit volume. For incompressible flow, the dynamic pressure of a fluid is the difference between its total pressure and static pressure. From Bernoulli's law, dynamic pressure is given by where p0 and ps are the total and static pressures, respectively.