粘弾性効果を考慮した導電性磁性流体の基礎方程式

概要

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There has been much research on the physical properties of magnetic fluids. However, investigation of constitutive equations has been far from adequate. In this paper, a new and complete set of fundamental equations for magnetic fluids having good conductivity of heat and electricity is formulated, considering viscoelastic effect by thermodynamical methods. The quasi-conservative part and dissipative part of constitutive equations are determined by taking partial derivatives of free energy and dissipation function, respectively. New fundamental equations are more general and strict in comparison with previous ones. Introducing a concept of electromagnetic exergy, this paper separetes pressure into two parts, on from electromagnetic effects and the other from thermodynamical effects. It also demonstrates how electric and magnetic effects act independently each other to increase apparent viscosity, and proposes new dimensionless numbers which represent these effects.
1989-08-25