Turbulence Inlet Visualizer

Compute k, epsilon, and omega from turbulence intensity and length scale while visualizing inlet eddy size.

visual calculatorTurbulence & Wall Modeling

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

turbulenceinlet BCeddy scalek-omega

formula

KaTeX rendered

\begin{aligned}\text{k = 1.5 (I U)\^{}2}\\[0.35em]\text{epsilon = Cmu\^{}(3/4) k\^{}(3/2) / l}\\[0.35em]\text{omega = sqrt(k)/(Cmu\^{}(1/4) l)}\end{aligned}

ASCII source

k = 1.5 (I U)^2, epsilon = Cmu^(3/4) k^(3/2) / l, omega = sqrt(k)/(Cmu^(1/4) l)

I (%)U mean (m/s)D or length scale (m)inlet type

k (m^2/s^2)

0.5400

epsilon (m^2/s^3)

11.6435

omega (1/s)

239.5787

length scale l (m)

0.0056

u prime (m/s)

0.6000

eddy turnover (s)

0.0093

l / D

0.0700

inlet mode

pipe / duct

Use this to sanity-check k-epsilon or k-omega inlet boundary conditions before copying values into a solver dictionary.

turbulence inlet BC eddy scale k-omega