Tutorial 3: A simple force balance on a spherical particle reaching terminal velocity in a fluid is given by; 4g(P, -p)D, P. V, = 3C,p Where Solution by Visual Basic V : Terminal velocity in m/s g: Acceleration of gravity Pp: Particle density Dp: The diameter of the spherical particle in m CD: Dimensionless drag coefficient. The drag coefficient on a spherical particle at terminal velocity varies with Reynolds number (Re) as followings: Cp=24/Re Cp=24*(1+0.14* Re^0.7)/Re Cp=0.44 for Re< 0.1 for 0.1=

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