Ackermann, Norbert L., authorAnat Arbhabhirama, authorColorado State University, Civil Engineering Section, publisher2019-09-172019-09-171962-07https://hdl.handle.net/10217/197969CER62AA84.July 30, 1962.Includes bibliographical references.The virtual mass of a sphere oscillating within a fixed concentric spherical shell filled with water was determined experimentally for seven sphere-to-shell diameter ratios between 0 and 0.865. Laboratory measurements of the virtual mass for diameter ratios less than 0.520 agreed closely with the theoretically predicted values based on a potential flow analysis. For ratios greater than 0.520 the virtual mass increased more rapidly than the potential flow theory indicated with an increase of 33% for a diameter ratio of 0.865.technical reportsengCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.Mass transfer -- Mathematical modelsHydraulic modelsViscosity -- Mathematical modelsFluid mechanicsText