Functional Dependence of Drag Coefficient of a Sphere on Reynolds Number

Abstract

An argument on the drag coefficient of a sphere results in the expression C = C 0 [1 + δ 0 /(R) 1/2 ] 2 where R is Reynolds number, C 0 δ 0 2 = 24 , and δ 0 = 9.06 This expression is in remarkable agreement with experiment for a wide range of R , i.e., 0 ≤ R ≲ 5000 .