導電性磁性流体の基礎方程式に対する熱力学的考察 : 非相対性・非極性理論

抄録

The governing equations for magnetic fluids with good conductivity of heat and electricity have not been sufficiently discussed thermodynamically. In this paper a new strict simplified method of deriving the basic equations for such condcuting magnetic fluids is presented by the themodynamical method using free energy and dissipation functin on the assumptions of the nonrelativistic and nonpolar theory. As results the physically desirable expression of the pressure part and Maxwellian stress in the constitutibe equation of stress is derived in a general theory that polarized and magnetized media are exist. Then the following results are obtained from thes theory : The surface forces acting on the material control surface include not only stress but also electromagnetic momentum flux density. And pointing vectors in the material volume are observed in the relativistic electromagnetic fields which moves against the fixed system.