PlumSim

β PlumSim

Gaussian + Briggs plume rise · ppmv

Composition

Presets & Custom

Preset

C1 [%]

C2 [%]

C3 [%]

C4 [%]

CO₂ [%]

H₂S [%]

SO₂ [%]

H₂O [%]

Total: 0.0 % Composition note (optional) Choose the component to analyse with the radio buttons. Q is the total mass rate of the mixture; model uses the selected component's share. Target species: C1/CH₄. MW ≈ 16 g/mol.

Release & Stack

Steady plume, neutral gas

Total mass rate Q_tot [kg/s]

Stack / flare height H [m]

Internal diameter D [m]

Exit velocity w [m/s]

Exit temperature T_exit [°C]

Wind speed at H [m/s]

Stability

Target species MW [g/mol]

U < 1 m/s is where steady Gaussian plume becomes unreliable; treat results as approximate / conservative only.

Environment & Site

T, P, simple downwash

Ambient T [°C]

Ambient P [kPa]

Nearest building height H_b [m]

If H_eff < 3·H_b, a simple conservative downwash correction shortens the effective height.

Contours

Plan view (ground)

Max downwind |x| [m]

Max crosswind |y| [m]

Coordinate system is centered at the source: x = 0, y = 0 at the handle. x>0 is downwind.

Scenarios

Local storage only

Name

Saved scenarios Stored in your browser only (localStorage). Nothing is uploaded.

◎ Contour Map

Source is the origin (0,0). Drag handle, then run.