A smooth wooden sphere (SG = 0.65) is connected by a thin rigid rod to a hinge in a wind tunnel, as in Fig. P7.112. Air at 20°C and 1 atm flows and levitates the sphere.
(a) Plot the angle θ versus sphere diameter d in the range 1 cm ≤ d ≤ 15 cm.
(b) Comment on the feasibility of this configuration. Neglect rod drag and weight.

Transcribed Image Text:

Rod, L-50 cm U- 12 m/s θ , Hinge