The air outside the ball was ignored, and it was assumed that the air inside the ball behaved according to a compressive, viscous fluid-flow model.
分析假设球内空气的行为符合压缩、粘性流体流动模型。
2
In the intergranular spaces of rocks, however, fluid must flow around and between grains in a tortuous path; this winding path causes a resistance to flow.
然而,在粒间孔发育的岩石中,流体必须在颗粒周围的曲折通道中流动;而这种曲折通道会对其流动产生阻力。
3
This pressure, in turn, is known to generate a fluidflow away from the tumor.