Question: Repeat Prob. 1044, except let the rotating fluid be engine oil at 60C. Discuss. Data from problem 44 Water at T = 20C rotates as

Repeat Prob. 10–44, except let the rotating fluid be engine oil at 60°C. Discuss.

Data from problem 44

Water at T = 20°C rotates as a rigid body about the z-axis in a spinning cylindrical container (Fig. P10–44). There are no viscous stresses since the water moves as a solid body; thus the Euler equation is appropriate. (We neglect viscous stresses caused by air acting on the water surface.) Integrate the Euler equation to generate an expression for pressure as a function of r and z everywhere in the water. Write an equation for the shape of the free surface (z_surface as a function of r).

FIGURE P10–44

Free surface P = Patm Ug = wr u = u =

Free surface P = Patm Ug = wr u = u = 0 Water N W R

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To repeat Problem 1044 with engine oil at 60C we need to use the density and viscosity of engine oil at 60C The density of engine oil at 60C is approx... View full answer

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