{"uid":"cap_pUinL5JbuxKgfw_Vky88L","slug":"frictionless-waterhammer-characteristic-grid-boundary-transcript-6eb3d0e4","name":"Frictionless Waterhammer Characteristic Grid Boundary Transcript","description":"Replay a supplied ideal waterhammer wave grid with explicit boundary 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a supplied ideal (frictionless) waterhammer wave propagation over a method-of-characteristics grid with explicit boundary velocities and returns the head/velocity field at requested time steps.","exampleAgentPrompt":"Run a frictionless waterhammer characteristic grid simulation for a 1000-meter pipe with wave speed 1200 m/s and gravity 9.81, using initial heads [50, 50, 50] meters, initial velocities [1.0, 1.0, 1.0] m/s, reservoir head of 55 meters, outlet velocities [0.0, 0.0] m/s for two time steps, and give me the head and velocity fields at sample steps 0 and 1.","exampleUseCases":[{"title":"Pipeline pressure surge verification","prompt":"I need to verify a waterhammer simulation for a 500-meter frictionless pipe with wave speed 1000 m/s, gravity 9.81, initial heads all at 100 meters across 5 nodes, initial velocities of 2.0 m/s, reservoir head 105 meters, outlet velocities dropping to zero over 3 steps, sampled at steps 0, 1, and 2 — can you replay the characteristic grid and give me the head field?"},{"title":"Hydraulic transient teaching demonstration","prompt":"Show me the pressure head wave propagation for a classic frictionless waterhammer scenario: 200-meter pipe, wave speed 800 m/s, gravity 9.81, 3-node initial heads at 60 meters, initial velocities 1.5 m/s, reservoir head 62 meters, outlet velocity goes from 1.5 to 0 in one step — sample at steps 0 and 1 so I can illustrate the method of characteristics."},{"title":"Boundary condition sensitivity check","prompt":"Run a frictionless waterhammer characteristic grid for a 2000-meter pipeline with wave speed 1400 m/s, gravity 9.81, 5 initial head nodes at 80 meters, initial velocities 0.5 m/s, reservoir head 82 meters, and outlet velocities of 0.5 m/s for 4 steps, sampling at steps 2, 3, and 4 — I want to check how the reservoir and outlet boundaries affect the mid-pipe pressure heads."}],"resultDescription":"Returns the simulated pressure head and velocity fields across the characteristic grid at the requested sample time steps, computed using the ideal (frictionless) method-of-characteristics approach with the supplied boundary conditions.","failureModes":["Mismatched array lengths between initial_heads and initial_velocities cause validation errors","outlet_velocities array shorter than the required number of time steps returns an error","wave_speed or length out of allowed bounds returns a 400 validation error","Incompatible claim object causes rejection","Payment not provided or insufficient USDC results in 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need a deterministic, frictionless method-of-characteristics waterhammer grid replay with explicit boundary control — particularly when you have a pre-defined ideal wave scenario and need head/velocity fields at specific time steps. Prefer this over full friction-inclusive solvers when validating ideal theory or teaching MOC concepts.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-04T06:39:54.895Z","isFirstParty":false,"canonicalSlug":"frictionless-waterhammer-characteristic-grid-boundary-transcript-6eb3d0e4"}