A reservoir-fed pipe cutaway maps pressure at 41 stations. Slow physical time reveals the upstream-traveling compression wave, reflection at a fixed-head reservoir and subsequent pressure reversals. The valve is commanded to reduce velocity linearly.
• 3D scene parts: Fixed-head reservoir; elastic-pipe pressure stations; closing valve and actuator; pressure profile ribbon; pressure recorder. • Controls: Pipe length (100–1000 m); Wave speed (600–1400 m/s); Initial velocity (0.5–3 m/s); Initial gauge pressure head (20–100 m); Valve velocity closure time (0.05–3 s); Physical time per playback second (0.1–1 s/s). • Live readouts: Valve gauge head (m); Peak gauge head (m); Minimum gauge head (m); Rapid-closure surge estimate (m); Wave round trip 2L/a (s); Physical elapsed time (s); Valve gauge pressure (bar). • Guided experiments: Rapid closure; Gradual closure; High surge exposure. • Four tabs (visual laboratory, curves and measurements, experiments, learn and assess), a model-verification run, a timestamped event log and a trial report.
B=a/g; Δt=L/(40a) C+=Hleft+B Vleft; C−=Hright−B Vright H=(C++C−)/2; V=(C+−C−)/(2B) At reservoir H=H0; at valve V=V0 max(0,1−t/Tc) Joukowsky rapid-closure ΔH=aV0/g; wave round trip=2L/a
Frictionless horizontal elastic water column, fixed-head upstream reservoir, prescribed downstream velocity, 40 reaches at Courant number 1. Wave speed is supplied, not derived from material. No attenuation, air, column separation or cavitation model. A below-vapor-pressure warning marks invalid single-phase results; negative head must not be interpreted as a valid cavitation prediction. Pipe/wave geometry and playback are scaled. Try the preset experiments, then compare the live readouts with the equations.
Yes. The pressure perturbation must be zero at the reservoir boundary.
No. It warns when single-phase assumptions fail but does not solve column separation.
Frictionless horizontal elastic water column, fixed-head upstream reservoir, prescribed downstream velocity, 40 reaches at Courant number 1. Wave speed is supplied, not derived from material. No attenuation, air, column separation or cavitation model. A below-vapor-pressure warning marks invalid single-phase results; negative head must not be interpreted as a valid cavitation prediction. Pipe/wave geometry and playback are scaled.