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所在平台: Udemy |
课程主页: https://www.udemy.com/course/fluid-dynamics-with-viscous-property-of-fluid/
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Coursera 课程《流体动力学（含流体粘性）》概述： 本课程深入探讨流体动力学，特别是流体粘性的相关概念。课程首先定义了流体，即能在压力梯度下流动的物质。基于密度是否随压力梯度变化，流体被分为不可压缩流体（如液体）和可压缩流体（如气体）。 课程重点介绍了流体的粘性，即流体对运动粒子提供的阻尼力。我们将学习如何根据牛顿方程测量粘度系数。对于低粘度流体，将讨论泊肃叶（Poiseuille）法；对于高粘度液体，将讨论斯托克斯（Stokes）法。同时，也会探讨泊肃叶法在液体垂直流动中的应用，并将其扩展到气体流的层流分析。 在流体动力学部分，课程将基于质量守恒原理讲解连续性方程。随后，我们将深入研究流体运动的基本方程——欧拉方程，并将其扩展到伯努利方程。伯努利方程的推导将考虑定常、无旋流体在压力梯度和保守的重力场作用下的情况。最后，课程将通过液体和气体的喷射速度等实际应用来阐释伯努利方程的运用。
Fluid is that class of matter which can flow through a channel under certain pressure gradient. The fluid with constant and pressure independent density is called incompressible fluid and if the density of the fluid depends on the pressure gradient then it is compressible fluid. As for example, liquid is an incompressible fluid whereas gas is itself a compressible fluid. Fluid has a basic property which is viscosity or viscous property by which it can offer damping force on the particle moving through the fluid. Here in this content, the measurement of viscosity coefficient is discussed as guided by Newton's equation. For low viscous fluid, Poiseuille's method is applied and for high viscous liquid, Stokes's method is applied for measurement of coefficient of viscosity and both methods are discussed here. Poiseuille's method is also discussed here for vertical flow of liquid and this method is made extended for streamline flow of gas. For fluid dynamics, the equation of continuity is made discussed here on the basis of mass conservation and after that the basic equation of fluid motion i.e. Euler equation is discussed here and the discussion is made extended to Bernoulli's equation under a few specific conditions like steady, irrotational flow of fluid under pressure gradient and also under influence of gravitational body force which is a conservative force field. The application of such Bernoulli's equation regarding velocity of efflux for both liquid and gas are discussed here.
