1.1流体的定义 流体的定义：在任何微小的剪切力的作用 下都能够发生连续变形的物质称为流体。 通俗的说法就是，能够流动的物质叫流 体。 A fluid is a substance which deforms continuously under the application of a shear stress.流体的定义：在任何微小的剪切力的作用 下都能够发生连续变形的物质称为流体。 通俗的说法就是，能够流动的物质叫流 体。 A fluid is a substance which deforms continuously under the application of a shear stress. 1.1 流体的定义