Morison Equation Wave & Current Force Calculator

Calculate wave and current hydrodynamic forces per unit length on slender offshore tubulars, jacket legs, and risers via Morison's drag and inertia formulation.

Tubular Member & Wave Kinematics

Outer Diameter D (m): Jacket leg, pile, or marine riser

Wave Period T_w (s):

Wave Velocity Amplitude u_w (m/s):

Co-directional Current u_c (m/s):

Drag Coeff C_D: 0.7 smooth, 1.05 fouled

Inertia Coeff C_M: 2.0 circular cylinder

Density ρ (kg/m³):

Hydrodynamic Forces & Flow Regime

Peak Combined Force

Keulegan-Carpenter (KC)

Peak Drag f_D

Peak Inertia f_I

Reynolds No. Re

Hydrodynamic Regime Assessment

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Morison Equation Wave & Current Force Calculator

Tubular Member & Wave Kinematics

Hydrodynamic Forces & Flow Regime

Frequently Asked Questions