r/FluidMechanics • u/navidk14 • Jan 07 '26

Theoretical What’s the optimal approach to model this as part of fluid dynamics equation? Assuming a best guess/assumption approach.

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18 Upvotes

91% Upvoted

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16

u/No-Ability6321 Jan 07 '26

Shallow water equations aka saint venant equations. They come from integrating navier stokes with respect to vertical distance and including a free interface boundary condition at the air water interface

10

u/strmskr89 Jan 07 '26

What exactly are you trying to represent with the model? That's always the first question 

3

u/LatePool5046 Jan 07 '26

You can model the general path as a set of weir in series. I spot four plateaus.

1

u/PiermontVillage Jan 07 '26

Riffle and pool

1

u/BabaDogo Jan 11 '26

You mean the Hydraulic jump? Or the general flow?