Validation of Added Resistance Computations by a Potential-Flow Boundary-Element Method

Abstract

Second-order forces have been widely investigated using 2D methods and more recently, also using 3D methods.The present work uses the 3D, timedomain, high-order boundary element code AEGIR to calculate the second order forces.Results for added resistance using both pressure integration and conservation-of-momentum methods are presented and compared with published data and experimental measurements.The two methods give consistent results for simple geometries like a sphere and the Wigley hull.More complex geometries such as the Series 60 hull and a bulk carrier are also calculated but only with the momentum conservation method.The results demonstrate the accuracy and flexibility of this method which is not overly sensitive to the details of the geometry.