 Drag equation - Derivation of the drag equation: Encyclopedia II - Drag equation - Derivation of the drag equationThe drag equation may be derived to within a multiplicative constant by the method of dimensional analysis. If a moving fluid meets an object, it exerts a force on the object, according to a complicated (and not completely understood) law. We might suppose that the variables involved under some conditions to be the speed, density and viscosity of the fluid, the size of the body (expressed in terms of its frontal area A), and the drag force. Using the algorithm of the π-theorem, one can reduce these five variables to two dimens ...
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