A ping pong ball of 2.7 gram of 38mm diameter floats in the air jet blown...

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A ping pong ball of 2.7 gram of 38mm diameter floats in the air jet blown by a hair dryer. Estimate the air flow speed required to keep the ping pong ball afloat. Refer to the following drag coefficient versus Reynold number. 688 CD 200 100 50 20 10 5 2 1 0.5 Strokes drag Cp=24/Re Sphere 0.2 0.1 0.05 0.02 0.1 0.2 0.5 12 5 10 20 50 Infinite plates U-->>> 200 1000 Reynolds number = puDlu OD Spheres Infinite D plates D Circular square plates Circular disks and square plates 10,000 100,000 1,000,000 A ping pong ball of 2.7 gram of 38mm diameter floats in the air jet blown by a hair dryer. Estimate the air flow speed required to keep the ping pong ball afloat. Refer to the following drag coefficient versus Reynold number. 688 CD 200 100 50 20 10 5 2 1 0.5 Strokes drag Cp=24/Re Sphere 0.2 0.1 0.05 0.02 0.1 0.2 0.5 12 5 10 20 50 Infinite plates U-->>> 200 1000 Reynolds number = puDlu OD Spheres Infinite D plates D Circular square plates Circular disks and square plates 10,000 100,000 1,000,000