Calculators

Quick estimates of common CFD parameters

Layers

Inlet Turbulence

Settling Velocity

Humidity

How Do They Work?

Layers

Estimate the height of the first layer to achieve a target y⁺, and the maximum growth ratio for the layers to cover the boundary layer thickness.

Velocity (m/s)

Length Scale (m)

Viscosity (Pa s)

Density (kg/m3)

Target y⁺ (-)

Layers (-)

First Layer (m)

Final Layer (m)

δ₉₉ (m)

Max. Growth Ratio (-)

Humidity

Calculate the specific and absolute humidity of air from the relative humidity.

Inlet Turbulence

Calculate k, ε, ω and ν_t from turbulence intensity and a turbulence length scale.

Velocity (m/s)

Intensity (%)

Length Scale (m)

k (m²/s²)

ω (s^-1)

ε (m²/s³)

ν_t (m²/s)

Settling Velocity

Calculate the terminal settling velocity of a spherical particle falling under gravity.

Particle Diameter (m)

Particle Density (kg/m3)

Fluid

Velocity (m/s)

Re (-)

C_D (-)

How do the calculators work?

The calculators use empirical correlations to estimate the output parameters. The correlations are described in the PDF below. Please note, the calculators are for educational purposes only and should not be used to analyse, design, accredit or validate real scientific / engineering / mathematical structures and flow systems.

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