Mass Flux Balance Visualizer

Check continuity imbalance from inlet/outlet density, velocity, area, and sources with a control-volume sketch.

visual calculatorNumerics & Stability

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

mass fluxcontinuityboundary conditioncase setup

formula

KaTeX rendered

\begin{aligned}\text{imbalance = sum(rho U A)\_in + source - sum(rho U A)\_out}\end{aligned}

ASCII source

imbalance = sum(rho U A)_in + source - sum(rho U A)_out

rho inlet (kg/m^3)U inlet (m/s)A inlet (m^2)inlet patchesrho outlet (kg/m^3)U outlet (m/s)A outlet (m^2)outlet patchesmass source (kg/s)

mass in (kg/s)

2.4500

mass out (kg/s)

2.4500

expected out (kg/s)

2.4500

imbalance (kg/s)

0.0000

continuity error

0.00%

status

balanced

inlet patches

outlet patches

Use signed normal velocities from solver reports when available. For compressible or reacting cases, include density changes and mass sources explicitly.

mass flux continuity boundary condition case setup