Modeling of dynamic behavior of a single-point moored submersible fish cage under currents

Analytical formulas to approximate the dependence of normal drag coefficient for cylinders and spheres on Reynolds number (Re) are proposed. The formulas for cylinders expand the expressions of Choo and Casarella (1971) to account for the decrease in drag forces experimentally observed for 2 × 105 < Re < 106. Modeling of this effect is important for proper interpretation of Froude scale physical modeling data.