Trim speculative descriptions from channels.json; keep names + shapes only

README.md

@@ -221,7 +221,7 @@ print(f"Output shape: {output_tensor.shape}") # (200, H, W, 2) = 20 × 10
   - `t` (bytes): float32 array `(T_full,)` — time stamps
   - `shape_t` (int): **complete trajectory length** (e.g., 3990, 2173)
   - `shape_h`, `shape_w` (int): spatial dimensions
-- **Field names** for each scenario are also documented machine-readably in [`{scenario}/channels.json`](#repository-layout) (with shapes and short physical descriptions).
+- **Field names** for each scenario are also documented machine-readably in [`{scenario}/channels.json`](#repository-layout) (with their Arrow keys and shapes).
 
 > **Note on spatial grids:** `x` and `y` are identical across all time frames, so they are stored once as `(H, W)` instead of `(T, H, W)`. For methods that require per-frame coordinate grids (e.g., PINNs), broadcast at runtime: `x_grid = np.broadcast_to(x[np.newaxis, :, :], (T, H, W))`. This is a zero-copy view with no memory overhead.
 
@@ -237,7 +237,7 @@ print(f"Output shape: {output_tensor.shape}") # (200, H, W, 2) = 20 × 10
   - `t` (bytes): float32 array `(T_full,)` — time stamps
   - `shape_t` (int): **complete trajectory length** (e.g., 2001)
   - `shape_h`, `shape_w` (int): spatial dimensions
-- **Channel order** of the 15 fields packed in `numerical` (along the last axis) is listed in [`combustion/channels.json`](combustion/channels.json) under `numerical.numerical_axis_names` (`index → name` + physical description). Authoritative units and definitions live in the [combustion dataset page](https://realpdebench.github.io/datasets/combustion/).
+- **Channel order** of the 15 fields packed in `numerical` (along the last axis) is listed in [`combustion/channels.json`](combustion/channels.json) under `numerical.numerical_axis_names` (`index → name`).
 
 ### Index files (JSON)
 

combustion/channels.json

@@ -2,31 +2,31 @@
   "scenario": "combustion",
   "real": {
     "fields": [
-      {"key": "observed", "shape": "(T, H, W)", "description": "OH* chemiluminescence (CL) intensity recorded by high-speed imaging of the swirl-stabilized NH3/CH4/air flame."}
+      {"key": "observed", "shape": "(T, H, W)"}
     ]
   },
   "numerical": {
     "fields": [
-      {"key": "observed", "shape": "(T, H, W)", "description": "Surrogate intensity field corresponding to the measured OH* signal, produced by a U-Net mapping from simulated fields to the observable modality."},
-      {"key": "numerical", "shape": "(T, H, W, 15)", "description": "Fifteen simulated thermodynamic and species fields from Large Eddy Simulation (STAR-CCM+ with the Eddy Dissipation Concept; 38 species, 184 reactions). The 15 channels are packed along the last axis in the order given by `numerical_axis_names`."}
+      {"key": "observed", "shape": "(T, H, W)"},
+      {"key": "numerical", "shape": "(T, H, W, 15)"}
     ],
     "numerical_axis_names": [
-      {"index": 0,  "name": "Absolute_Pressure",            "description": "Absolute pressure field."},
-      {"index": 1,  "name": "Chemistry_Heat_Release_Rate",  "description": "Volumetric heat release rate from chemical reactions."},
-      {"index": 2,  "name": "Mole_Fraction_of_CH4",         "description": "Mole fraction of methane (CH4)."},
-      {"index": 3,  "name": "Mole_Fraction_of_CO",          "description": "Mole fraction of carbon monoxide (CO)."},
-      {"index": 4,  "name": "Mole_Fraction_of_CO2",         "description": "Mole fraction of carbon dioxide (CO2)."},
-      {"index": 5,  "name": "Mole_Fraction_of_H2O",         "description": "Mole fraction of water vapour (H2O)."},
-      {"index": 6,  "name": "Mole_Fraction_of_NH2",         "description": "Mole fraction of the amino radical (NH2)."},
-      {"index": 7,  "name": "Mole_Fraction_of_NH3",         "description": "Mole fraction of ammonia (NH3)."},
-      {"index": 8,  "name": "Mole_Fraction_of_OH",          "description": "Mole fraction of the hydroxyl radical (OH); proxy for the measured OH* chemiluminescence signal."},
-      {"index": 9,  "name": "Pressure",                     "description": "Gauge pressure field."},
-      {"index": 10, "name": "Temperature",                  "description": "Static temperature field."},
-      {"index": 11, "name": "Velocity[i]",                  "description": "x-component of the velocity vector."},
-      {"index": 12, "name": "Velocity[j]",                  "description": "y-component of the velocity vector."},
-      {"index": 13, "name": "Velocity[k]",                  "description": "z-component of the velocity vector."},
-      {"index": 14, "name": "Velocity_Magnitude",           "description": "Magnitude of the velocity vector."}
+      {"index": 0,  "name": "Absolute_Pressure"},
+      {"index": 1,  "name": "Chemistry_Heat_Release_Rate"},
+      {"index": 2,  "name": "Mole_Fraction_of_CH4"},
+      {"index": 3,  "name": "Mole_Fraction_of_CO"},
+      {"index": 4,  "name": "Mole_Fraction_of_CO2"},
+      {"index": 5,  "name": "Mole_Fraction_of_H2O"},
+      {"index": 6,  "name": "Mole_Fraction_of_NH2"},
+      {"index": 7,  "name": "Mole_Fraction_of_NH3"},
+      {"index": 8,  "name": "Mole_Fraction_of_OH"},
+      {"index": 9,  "name": "Pressure"},
+      {"index": 10, "name": "Temperature"},
+      {"index": 11, "name": "Velocity[i]"},
+      {"index": 12, "name": "Velocity[j]"},
+      {"index": 13, "name": "Velocity[k]"},
+      {"index": 14, "name": "Velocity_Magnitude"}
     ]
   },
-  "note": "Authoritative physical definitions and units are documented at https://realpdebench.github.io/datasets/combustion/."
+  "note": "The `observed` column stores the measurable modality (OH* chemiluminescence intensity for real, surrogate-mapped intensity for numerical). The `numerical` column packs 15 simulation fields along the last axis in the order given by `numerical_axis_names`."
 }

controlled_cylinder/channels.json

@@ -2,16 +2,16 @@
   "scenario": "controlled_cylinder",
   "real": {
     "fields": [
-      {"key": "u", "shape": "(T, H, W)", "description": "Streamwise velocity component, measured by Particle Image Velocimetry (PIV) under active flow control."},
-      {"key": "v", "shape": "(T, H, W)", "description": "Transverse velocity component, measured by Particle Image Velocimetry (PIV) under active flow control."}
+      {"key": "u", "shape": "(T, H, W)"},
+      {"key": "v", "shape": "(T, H, W)"}
     ]
   },
   "numerical": {
     "fields": [
-      {"key": "u", "shape": "(T, H, W)", "description": "Streamwise velocity component from CFD simulation with the same control input as the paired experiment."},
-      {"key": "v", "shape": "(T, H, W)", "description": "Transverse velocity component from CFD simulation."},
-      {"key": "p", "shape": "(T, H, W)", "description": "Pressure field from CFD simulation."}
+      {"key": "u", "shape": "(T, H, W)"},
+      {"key": "v", "shape": "(T, H, W)"},
+      {"key": "p", "shape": "(T, H, W)"}
     ]
   },
-  "note": "Each field is stored as a separate column in the Arrow dataset. Control parameters (Reynolds number, control frequency) are encoded in the trajectory filenames and in the *_params_*.json index files. Authoritative physical definitions and units are documented at https://realpdebench.github.io/datasets/controlled_cylinder/."
+  "note": "Each field is stored as a separate column in the Arrow dataset. Control parameters (Reynolds number, control frequency) are encoded in the trajectory filenames and in the *_params_*.json index files."
 }

cylinder/channels.json

@@ -2,16 +2,16 @@
   "scenario": "cylinder",
   "real": {
     "fields": [
-      {"key": "u", "shape": "(T, H, W)", "description": "Streamwise velocity component, measured by Particle Image Velocimetry (PIV)."},
-      {"key": "v", "shape": "(T, H, W)", "description": "Transverse velocity component, measured by Particle Image Velocimetry (PIV)."}
+      {"key": "u", "shape": "(T, H, W)"},
+      {"key": "v", "shape": "(T, H, W)"}
     ]
   },
   "numerical": {
     "fields": [
-      {"key": "u", "shape": "(T, H, W)", "description": "Streamwise velocity component from CFD simulation."},
-      {"key": "v", "shape": "(T, H, W)", "description": "Transverse velocity component from CFD simulation."},
-      {"key": "p", "shape": "(T, H, W)", "description": "Pressure field from CFD simulation."}
+      {"key": "u", "shape": "(T, H, W)"},
+      {"key": "v", "shape": "(T, H, W)"},
+      {"key": "p", "shape": "(T, H, W)"}
     ]
   },
-  "note": "Each field is stored as a separate column in the Arrow dataset. Authoritative physical definitions and units are documented at https://realpdebench.github.io/datasets/cylinder/."
+  "note": "Each field is stored as a separate column in the Arrow dataset."
 }

foil/channels.json

@@ -2,16 +2,16 @@
   "scenario": "foil",
   "real": {
     "fields": [
-      {"key": "u", "shape": "(T, H, W)", "description": "Streamwise velocity component around the NACA0025 foil cross-section, measured by Particle Image Velocimetry (PIV)."},
-      {"key": "v", "shape": "(T, H, W)", "description": "Transverse velocity component, measured by Particle Image Velocimetry (PIV)."}
+      {"key": "u", "shape": "(T, H, W)"},
+      {"key": "v", "shape": "(T, H, W)"}
     ]
   },
   "numerical": {
     "fields": [
-      {"key": "u", "shape": "(T, H, W)", "description": "Streamwise velocity from CFD simulation around the foil cross-section."},
-      {"key": "v", "shape": "(T, H, W)", "description": "Transverse velocity from CFD simulation."},
-      {"key": "p", "shape": "(T, H, W)", "description": "Pressure field from CFD simulation."}
+      {"key": "u", "shape": "(T, H, W)"},
+      {"key": "v", "shape": "(T, H, W)"},
+      {"key": "p", "shape": "(T, H, W)"}
     ]
   },
-  "note": "Each field is stored as a separate column in the Arrow dataset. Geometric parameters (angle of attack, Reynolds number) are stored in the *_params_*.json index files. Authoritative physical definitions and units are documented at https://realpdebench.github.io/datasets/foil/."
+  "note": "Each field is stored as a separate column in the Arrow dataset. Geometric parameters (angle of attack, Reynolds number) are stored in the *_params_*.json index files."
 }

fsi/channels.json

@@ -2,16 +2,16 @@
   "scenario": "fsi",
   "real": {
     "fields": [
-      {"key": "u", "shape": "(T, H, W)", "description": "Streamwise velocity component around the vibrating cylinder, measured by Particle Image Velocimetry (PIV)."},
-      {"key": "v", "shape": "(T, H, W)", "description": "Transverse velocity component, measured by Particle Image Velocimetry (PIV)."}
+      {"key": "u", "shape": "(T, H, W)"},
+      {"key": "v", "shape": "(T, H, W)"}
     ]
   },
   "numerical": {
     "fields": [
-      {"key": "u", "shape": "(T, H, W)", "description": "Streamwise velocity from coupled fluid-structure simulation."},
-      {"key": "v", "shape": "(T, H, W)", "description": "Transverse velocity from coupled fluid-structure simulation."},
-      {"key": "p", "shape": "(T, H, W)", "description": "Pressure field from coupled fluid-structure simulation."}
+      {"key": "u", "shape": "(T, H, W)"},
+      {"key": "v", "shape": "(T, H, W)"},
+      {"key": "p", "shape": "(T, H, W)"}
     ]
   },
-  "note": "Each field is stored as a separate column in the Arrow dataset. Structural parameters (mass ratio, damping ratio, Reynolds number) are stored in the *_params_*.json index files. Authoritative physical definitions and units are documented at https://realpdebench.github.io/datasets/fsi/."
+  "note": "Each field is stored as a separate column in the Arrow dataset. Structural parameters (mass ratio, damping ratio, Reynolds number) are stored in the *_params_*.json index files."
 }