tilt_pour_rate — DRIVE scoop op

• Data kinds: scalar × scalar × scalar × scalar × scalar × scalar × scalar → table

• Call: import fullseye as fs; fs.ledger.tilt_pour_rate(theta_deg: 'float', omega_deg_s: 'float', phi_deg: 'float', L: 'float', h0: 'float', B: 'float', bulk_density: 'float') -> 'dict' (to call the implementation directly, import scoop; scoop.tilt_pour_rate(theta_deg: 'float', omega_deg_s: 'float', phi_deg: 'float', L: 'float', h0: 'float', B: 'float', bulk_density: 'float') -> 'dict'; from the registry, opsdrive.get("tilt_pour_rate"))

Usage

Quasi-static flow rate W = ρ_b B (−dA/dθ) ω [kg/s] when the container of tilt_wedge_retained is tilted at angular velocity ω (supply-limited flow: as long as it is tilted more slowly than the mouth can pass, the flow rate is set by the tilting speed).

dA/dθ: before the slope reaches the back (x_k = h₀ / t < L) it is −h₀² sec²(φ−θ) / (2 t²), after reaching it −½ L² sec²(φ−θ) (t = tan(φ − θ)). At θ = 0 it is h₀² / (2 sin² φ) (wedge whose front slope has length h₀ / sin φ).

Returns: rate [kg/s], rate_area (−dA/dθ·ω [m²/s]), fraction (fraction poured out), theta_back_deg. Raises ValueError: argument ranges (including ω ≤ 0).

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• poc_powder_scoop_pour — py -3.11 examples/poc_powder_scoop_pour.py

Ops the type connects to (they accept table as input)

course_layout · course_occupancy · course_contains · world_build · world_camera · world_move · lidar_scan · rss_longitudinal_same

Same category (scoop)

spoon_bowl_volume · scoop_synth_side · revolution_volume_side · two_view_volume · scoop_volume_read · scoop_count · scoop_image_limit · tilt_wedge_retained

*Provenance: scoop.py — DRIVE operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.