Numerical simulation of added mass determination of standard ellipsoids

Abstract

Added mass determination of underwater moving objects becoming more and more important now a days. With the advancement in computational technology and computing fluid dynamics technology, a new method is presented by the commercial CFD code. This method can be used to compute the added mass of an object with complex shapes also. The method is based on unsteady, inviscid model and dynamic mesh technique for transient simulation of body motions. By taking the difference of forces under the condition of uniform motions and accelerated motions, added mass of an object is calculated. In principle two cases were run i.e uniform and accelerated, both for linear and angular motions. Differences of forces/torque of uniform and accelerated motions were used to calculate added mass of the given object for both linear and angular motions.