SYSTEM NOTE
Read the projection step, not a decorative flow picture.
The grid keeps velocity, pressure proxy, divergence, and a solid mask. The pressure solve and projection try to reduce divergence after advection and diffusion.
OBSERVATION CHAMBER / MVP
CFD Solver Lab
Step a browser projection-method grid solver and inspect velocity, pressure proxy, divergence, residual, boundary, and solid-mask diagnostics.
flow
Operational
PROJECTION METHOD / GRID SOLVER
Step a lightweight browser solver and inspect velocity, pressure proxy, divergence, residual, and solid mask changes.GRID180 x 90
SOLID CELLS0
VIEWSpeed magnitude
FINITEOK
OBSERVATION POINTS
Move geometry, solve pressure, then compare diagnostics.
- Step once shows how one solver update changes speed, pressure, and divergence.
- Pressure residual is the largest pressure update in the Jacobi solve; it is a convergence clue, not an error guarantee.
- Copy and sponge outlets are simplified browser boundary choices, so results can change with outlet and grid.
SYSTEM NOTE
A 2D collocated grid stores velocity u(x,y), v(x,y), pressure proxy p, divergence div u, and a solid mask. Each step applies advection, simplified diffusion, boundary conditions, a Jacobi pressure Poisson solve, and projection u' = u - grad p. The residual is the maximum pressure update during the pressure solve; it is a convergence clue, not a strict error guarantee.
OBSERVATION GUIDE
Touchpoints for Observation
Observe a browser projection-method solver by comparing speed, pressure proxy, divergence, solid mask, residual, and outlet behavior.
- Step once, solve projection, switch Speed, Pressure, Divergence, and Solid mask views, then add, move, or draw obstacles and compare diagnostics.
- Pressure is a browser proxy used for projection, not a certified physical pressure field.
- Copy and sponge outlets are simplified boundary choices; grid, outlet, viscosity, and iterations can change the result.
- Increasing pressure iterations should generally reduce pressure residual for the current step, while divergence RMS shows the projected field balance.
This is a lightweight browser projection-method observation LAB. It is not formal CFD software, engineering design validation, wind-tunnel measurement, or a safety-evaluation tool.
Runs inside the browser with no upload and no registration.
OBSERVATION POLICY
This observation LAB runs in your browser. It does not upload images, pointer traces, or input.
Route
This chamber belongs to Fields in Motion.
FIELD Back to Fields in Motion Route.