Calculators and Tools
Browse a range of CFD calculators and tools

1st Cell Height


Inlet Turbulence


Particle Settling




How Do They Work?

First Cell Height Calculator

For a given flow condition, estimate the height of the wall adjacent cell that can be used to achive a desired y+ value at the wall. Default values for air at 10 m/s, over a 1m flat plate are provided below.

Humidity Calculator

For a given temperature, pressure and relative humidity, compute the specific humidity (mass of water vapour per unit mass of dry air), absolute humidity (mass of water vapour per unit mass of air-water vapour mixture) and mass fraction of water vapour. Default values for air at room temperature (25 degrees C), pressure (101325 Pa) and a relative humidity of 60% are provided.

Turbulence Inlet Conditions Calculator

For a given freestream turbulence intensity and length scale, compute the inlet values of turbulent kinetic energy (k), turbulence dissipation rate (epsilon), specific dissipation rate (omega) and turbulent kinematic viscosity (nut). Default values for a flow at 10 m/s, with an intensity of 5% are shown.

Particle Settling Velocity Calculator

Calculate the terminal settling velocity of a spherical particle falling under gravity in a viscous fluid. Default values for a 100 micron sand particle in water are provided.

How do the calculators work?

The calculators use a series of empirical correlations to obtain an engineering estimate of the quantities of interest. These values should only be used as first estimates and should be updated using more accurate and validated methods when designing or analysing real engineering or scientific systems. To see the formulas that are used in the calculators, consult the PDF below.

Download LinkRead PDF