Boundary Conditions and Their Effects on the Added Mass

Not long ago the zero added mass has been replaced by a none zero constant added mass in the marine, biological and other fields. A few people realized that both models are simply wrong. While the majority researchers believe the latter without any shred of real logic or evidence, there are new buds showing a movement toward the real world. Currently there is a new group of researchers who believe that the added mass changes occur without any physical reason. No one in that group can explain what are the physical roots (causes) to the change, yet this acknowledgment itself is a progress. There is a strong and abundant physically observed evidence and logical arguments showing that the added mass varies and even heavily used in the animal kingdom such as octopus maneuvering. These small amount buds discussing the added mass change and attribute it to limited causes which are presented in this paper. A new cause for the added mass change is adjoined which explain several phenomena which were not possible to explain before. Furthermore, the added mass change affects the governing equations is discussed the effects which previously ignored. The previous causes to the added mass change are the orientation change, volume change, movement in the phase change media, the body deformation (without volume change). In this paper, a new cause to the added mass change is presentedThis is breakthrough work describing the interaction of body in liquid.. It shows that added as used (constant ) should be replaced by variable added maass.