The force in a circular cylinder depends on the free stream velocity V, diameter of cylinder D, density of fluid `rho`, viscosity of fluid `mu`, and time t. By using Buckingham�??s `pi` theorem show that `F=rhoV^2D^2*phi(mu/(rhoVD),(Vt)/D)` Take `rho,V, D` as repeating variables. [2070-Ashad] [8]

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Define model. Write down its advantages and applications.

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Define Dimensional Analysis and write down its uses.

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