Physics 4 — Thermo & Fluids

Fluids in motion — Bernoulli

continues from lesson 4 — values defined earlier in the course stay live here

Energy bookkeeping for flow: where a pipe narrows, fluid speeds up and its pressure drops. Continuity sets the speed; Bernoulli prices it in pressure:

v_{1} := 2 m/s

= 2 m / s speed in the wide section

A_{ratio} = 4

wide-to-narrow area ratio

v_{2} = v_{1} \cdot A_{ratio}

= 8 m / s same flow through ¼ the area

dP = \frac{1}{2} \cdot \rho_{w} \cdot \left(v_{2}^{2} - v_{1}^{2}\right)

= 30000 Pa pressure DROP in the narrow section (Pa)

Where next: Physics 5 — where classical physics breaks and the quantum/relativistic rules take over.