Bernoulli Equation Applications

Recall from last time the equation of

  • steady (\(\frac{\partial}{\partial t} = 0\))

  • inviscid (\( \frac{\partial V}{\partial y} = 0\))

  • gravity vector is down (\(-z\))

  • incompressible (\(\rho = constant\))

  • irrotational (\(curl(V)=0\))

Results in

\( \frac{p_1}{\rho g} + \frac{V_1^2}{2g} + z_1 = \frac{p_2}{\rho g} + \frac{V_2^2}{2g} + z_2 \)

Below are some examples illustrating its use

Example: Flow out of a holy tank

Identify the problem solving steps employed

../../_images/bernoulli-ex1.png

Example: Pressure near tank outlet

Identify the problem solving steps employed

../../_images/bernoulli-ex2.png

Example: How high will a fountain go?

Consider the fountains at a resort. What kind of pressures and velocities are required to make the show happen?

../../_images/bellagio.png

Here’s a related problem that could form the basis of fountain design.

Identify the problem solving steps employed

../../_images/bernoulli-ex3.png