A sluice-fed stilling basin shows a shallow incoming stream, a turbulent roller guide and a deeper downstream section. Change incoming discharge and depth to calculate conjugate depth and specific-energy loss.
• 3D scene parts: Sluice and incoming section; jump roller guide; conjugate section; stilling-basin baffles; depth comparison stations. • Controls: Discharge (1–15 m³/s); Rectangular basin width (2–6 m); Incoming depth (0.15–1.5 m). • Live readouts: Incoming Froude number; Conjugate depth (m); Incoming velocity (m/s); Downstream velocity (m/s); Specific-energy loss (m); Momentum mismatch (m³). • Guided experiments: Strong jump; No jump; Reduce discharge. • Four tabs (visual laboratory, curves and measurements, experiments, learn and assess), a model-verification run, a timestamped event log and a trial report.
Fr1=Q/(b y1 √(g y1)) y2=y1[√(1+8Fr1²)−1]/2 for Fr1>1 ΔE=(y2−y1)³/(4y1y2) M=b y²/2+Q²/(g b y)
Horizontal rectangular-channel classical jump. Subcritical inflow produces no jump and keeps y2=y1. Roller length, whitewater and baffle geometry are illustrative; no jump-location, tailwater matching or CFD prediction. Try the preset experiments, then compare the live readouts with the equations.
No. Momentum is conserved in the ideal balance while energy is dissipated.
No. The jump branch requires Fr1 greater than one.
Horizontal rectangular-channel classical jump. Subcritical inflow produces no jump and keeps y2=y1. Roller length, whitewater and baffle geometry are illustrative; no jump-location, tailwater matching or CFD prediction.