Calculate Drag Force for a 14.7mm Sphere in Oil with Given Parameters

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SUMMARY

The discussion focuses on calculating the drag force acting on a 14.7 mm diameter sphere falling at a velocity of 0.08 m/s in oil with a dynamic viscosity (µ) of 0.1 Ns/m² and a density (σ) of 0.85 kg/m³. The drag force is calculated using the formula F_d = 0.5 * rho * C_d * A * u², resulting in a drag force of 1.85e-3 N. The Reynolds number (Re) is also relevant, calculated as Re = u * p * L / µ, where the coefficient of drag (C_d) for a sphere is noted to be approximately 0.47.

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Tommybc
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A sphere, 14.7 mm in diameter, drops at a rate of 0.08 m/s in oil
µ = 0.1 Ns/m^2 , σ = 0.85 ). Calculate the drag force acting on the sphere.

[Answer: 1.85e-3 N]


F_d=0.5*rho*C_d*A*u^2, Re=u*p*L/μ

I attempted to find the Re, but am struggling on finding the coefficient of drag now. Once I crack this I will be able to progress please help!
 
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