小第期中考上的一题,至今仍不得其解 还请大大能提点一番. 感谢!! A 2D flow in an open canal over a “bump” on its bottom as shown in Figure 1. (a) (10 points) Write down the governing differential equations for mass and momentum transport if the flow is non-Newtonian. Hint: compressible case. (b) (8 points) Write down the governing differential equations for mass and momentum transport if the flow is Newtonian (viscosity = μ). Hint: compressible case. (c) (12 points) Now, suppose the flow is frictionless (inviscid) and has a constant density. If the steady-state upstream flow is at speed U0, and the upstream water depth is H0. The bump's height is , and its length is L Sketch the surface shape over the bump, and find the mathematical expression water depth H at the top of the bump. Hint: first plot the streamline near the bottom to see how velocity behaves for the inviscid case. figure1:https://www.dropbox.com/s/abnvgxtkj740gh3/figure1.PNG --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 140.112.218.188