For the spinning cylinder of Fig. P15–54, generate a dimensionless parameter for rotational speed relative to freestream speed (combine variables ω, D, and V into a non dimensional Pi group). Repeat the calculations of Prob. 15–54 for several values of angular velocity ω. Use identical inlet conditions for each case. Plot lift and drag coefficients as functions of your dimensionless parameter. Discuss.

Data from Problem 15-54

Generate a computational domain and grid, and calculate stationary turbulent flow over a spinning circular cylinder (Fig. P15–54). In which direction is the side force on the body—up or down? Explain. Plot streamlines in the flow. Where is the upstream stagnation point?

FIGURE P15–54

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V -D-