{"artifact_id":"L1-457","layer":"L1","title":"Hydrodynamic Lubrication (Reynolds Equation)","domain":"Robotics","sub_domain":"Tribology","physics_fingerprint":{"L_DAG":2.8,"title":"Hydrodynamic Lubrication (Reynolds Equation)","domain":"Robotics","carrier":"N/A","primitives":["D.space","S.fdm.cavitation_constraint","O.least_squares.bearing"],"sub_domain":"Tribology","noise_model":"measurement_gaussian","problem_class":"parameter_estimation","solution_space":"pressure_film_field","difficulty_delta":3,"integration_axis":"thin_film_domain","sensing_mechanism":"pressure_film_measurement"},"observable_profile":{"metric":"pressure_field_RMSE_MPa","regime":"Existence of the recovered pressure_film_field is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by declared priors. Stability is conditionally stable (kappa_eff ~= 100); viscosity_temperature_dependence dominates the stability cliff; the remaining mismatch parameters contribute higher-order bias terms. Measurement gaussian sets the irreducible data-fidelity floor.","secondary":"load_capacity_RMSE_N"},"size_tiers":{"center_spec":{"omega":{"N_grid_x":50,"speed_RPM":3000,"viscosity_Pa_s":0.05,"eccentricity_ratio_e":0.5},"input_format":"measurement_only","problem_class":"parameter_estimation","forward_operator":"pressure_film_measurement","epsilon_fn_center":"0.5 pressure_field_RMSE_MPa"},"omega_bounds":{"N_grid_x":[10,200],"speed_RPM":[100,100000],"viscosity_Pa_s":[0.001,1.0],"eccentricity_ratio_e":[0.0,0.9]},"epsilon_bounds":{"pressure_field_RMSE_MPa":[0.05,5.0]},"allowed_problem_classes":["parameter_estimation"],"allowed_omega_dimensions":["N_grid_x","eccentricity_ratio_e","speed_RPM","viscosity_Pa_s"],"allowed_forward_operators":["pressure_film_measurement"]},"hardness_fn":{"type":"epsilon_fn","delta":3,"kappa":3000,"metric":"pressure_field_RMSE_MPa"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0xb43e3e0cba2d00b611e1a7d0ecd8b06fc0cd15de90bf464ef107101558111107","chain_tx_hash":"0xad3ae721d03843349c39bc7d9e55bdc04ba5a468d2c574a76f6c675e2cb6fde1","chain_block":41555279}