VentiFlux logo VentiFluxEngineering Tools

Free engineering tools

Calculators we actually use in practice.

Quick, transparent engineering calculators for CFD setup, psychrometrics, and New York home energy incentives. No sign-up, runs entirely in your browser.

New York incentives

Home Energy Incentives Estimator

Pre-screen a home for NYSERDA, Con Edison Clean Heat, PSEG Long Island, and EmPower+ heat-pump rebates: utility routing, income lane, fuel rules, and stacking limits.

Open the estimator →

CFD meshing

Inflation Layer Calculator

First-cell height for a target y+, boundary-layer thickness estimate, and the maximum growth ratio so your inflation layers cover the boundary layer.

Open the calculator →

CFD boundary conditions

Inlet Turbulence Calculator

From turbulence intensity and a length scale: turbulent kinetic energy k, dissipation ε, specific dissipation ω, and eddy viscosity νt.

Open the calculator →

Multiphase flow

Particle Settling Velocity

Terminal settling velocity of a spherical particle with the Schiller-Naumann drag correction, solved iteratively beyond the Stokes regime.

Open the calculator →

Psychrometrics

Humidity Calculator

From dry-bulb temperature and relative humidity: saturation pressure (Arden-Buck), humidity ratio, and the vapor mass fraction for CFD species inlets.

Open the calculator →

Verification & validation

Grid Convergence Calculator

Richardson extrapolation from three mesh levels: observed order of accuracy, extrapolated zero-grid-spacing value, and the Grid Convergence Index (GCI).

Open the calculator →