Experimental Studies of the Lift on Two Equal Circular Cylinders placed side by side in a Uniform Stream at Low Reynolds Numbers

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Lifts acting on two equal circular cylinders placed side by side in a uniform stream were measured by means of lamp scale and mirror method at Reynolds numbers from 0.01 to 1.6. The results obtained are as follows:<BR>1. Each cylinder experiences a repulsive force.<BR>2. The value of lift coefficient decreases monotonously as the Reynolds number is increased.<BR>3. When the Reynolds number is sufficiently small, the value of lift coefficient increases first and then decreases as the ratio of the distance between two cylinders to the diameter of the cylinder increases.<BR>These results are in good agreement with the theoretical conclusions which are led from the Oseen’s linearized equations of motion.<BR>The photographs of the actual flow pattern were also taken.

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