Added Mass of Equilateral-Triangular Cylinders

by Victor W. Goldschmidt,
Alec Protos,

Serial Information: Journal of the Engineering Mechanics Division, 1968, Vol. 94, Issue 6, Pg. 1539-1546

Document Type: Journal Paper


The added mass of a moving cylindrical body due to the acceleration of the surrounding fluid may be evaluated theoretically by determining the kinetic energy of the fluid surrounding the body, and experimentally by measuring the applied force and resulting acceleration of the body. A theoretical and experimental determination of the added mass for a triangular cylinder is presented. The theoretical analysis is based on the kinetic energy method and neglects any real fluid effects. The theoretical added mass coefficient is computed as 1.53 whereas the experiment gives a value of 1.57. A comparison is made with the corresponding values for cylinders of different cross sections. A short discussion on whether or not viscosity and wall effects were of such magnitude to invalidate the experimental values is also presented.

Subject Headings: Cylinders | Kinetics | Energy measurement | Energy methods | Computing in civil engineering | Comparative studies | Cross sections | Viscosity

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