SYSTEM NOTE
A body or channel changes the grid because it becomes solid cells.
The display stays quiet: blue-scale speed magnitude, dark solid masks, pointer probe, and numeric before/after comparison.
OBSERVATION CHAMBER / MVP
Obstacle Flow Lab
Place, move, and draw solid obstacles on a 2D grid, then watch the computed speed field and diagnostics respond.
flow
Prototype
2D GRID / SOLID MASK
Place a cylinder, wall, gap, or nozzle, then watch the computed speed magnitude field respond.
First observation
Pick a mission, capture a baseline, try a preset, then read the delta values.
SPEED MAGNITUDE ONLY
SOLID MASK AFFECTS THE GRID
OBSERVATION POINTS
Place, move, draw, compare.
- Cylinder, Wall, Gap, and Nozzle presets rebuild the solid mask, not a decorative overlay.
- Pointer probe reads the grid cell, speed, u, v, and solid state under the canvas pointer.
- Capture baseline compares downstream speed, solid cells, inlet/outlet balance, divergence RMS, and projection residual.
SYSTEM NOTE
A 2D grid stores velocity u(x,y), v(x,y). The browser solver advects velocity, applies viscosity-like diffusion, projects pressure to reduce divergence, and rebuilds solid-mask boundaries from obstacles, walls, gaps, or nozzle presets.
OBSERVATION GUIDE
Touchpoints for Observation
Observe how computed speed magnitude changes when the solid mask becomes a cylinder, wall, gap, nozzle, or a shape you draw.
- Try Cylinder, Wall, Gap, and Nozzle presets, then move or draw obstacles and capture a baseline to compare downstream speed, solid cells, inlet/outlet balance, divergence RMS, and projection residual.
- A gap can change the downstream speed sample because the available path is narrower.
- A wall makes the field go around solid cells instead of through them.
- The nozzle preset narrows the path using solid cells; it is still a grid experiment, not a wind-tunnel measurement.
This is a CFD-entry observation LAB for grid flow and solid masks. It is not engineering CFD, design validation, wind-tunnel measurement, or a Karman vortex-street solver.
Runs inside the browser with no upload and no registration.
OBSERVATION POLICY
This lab runs in your browser. No image, pointer trace, or input is uploaded by this prototype.
Route
This chamber belongs to Fields in Motion.
FIELD Back to Fields in Motion Route.