Abstract
Power expended theorems have been used mainly for structure analysis in the field of material science. These theorems have been constracted on the standpoint of statics, so they cannot treat dissipative phenomena. In this paper, we consider dissipative effects and give a power expended theorem for conducting magnetic fluids with internal rotation for the first time. On this way, we assume that magnetic fluid is incompressible and suspended particles rotate rigidly, and we derive the theorem being based on the kinematic balance equations which we obtained in the previous reports. Developing this theorem, we will expect to obtain some useful informations about flow fields and electromagnetic fields, especially about electromagnetic pressure.
