Equivalence Ratio Mixer

Compute actual AFR, phi, lambda, and heat-release rate from fuel and air mass flow.

visual calculatorCombustion & Reacting Flow

Read the flow shape before trusting the number.

This page turns a CFD setup into regime, scale, and dominant-effect cues. Adjust the calculator below and compare the moving graphic with the computed result.

input scale

model

check

equivalence ratioAFRcombustionmixing

formula

KaTeX rendered

\begin{aligned}\text{phi = AFR\_st / AFR\_actual}\\[0.35em]\text{lambda = 1/phi}\end{aligned}

ASCII source

phi = AFR_st / AFR_actual, lambda = 1/phi

fuelfuel mdot (kg/s)air mdot (kg/s)

leanstoichiometric phi=1rich

actual AFR

18.000

phi

0.9533

lambda

1.0490

heat release (W)

5.000e+5

air margin (kg/s)

0.0084

Use the same fuel basis as the chemistry mechanism. This is a mass-flow mixer check, not an equilibrium solver.

equivalence ratio AFR combustion mixing