阐述了流体流动过程中三大守恒方程的原理及其各项表达式的物理含义,分析了三大守恒方程联立流体流变本构方程的必要性并进行了数字求解;对材料流变本构关系原理从自然哲理角度进行了探讨,深化教学内容,启发学生思维,达到更好的教学效果。 The principles of the three conservation equations and the physical meanings of the expressions are expounded. The necessity of simultaneous rheological constitutive equations of the three conservation equations is analyzed and the numerical solution is given. The principle of structure relationship explores from the perspective of natural philosophy, deepens the teaching content, inspires students’ thinking and achieves better teaching effect.