Boundary-Layer Prism Stack

Compute last-layer height and total prism thickness from first height, layers, and growth ratio.

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

meshboundary layerprism layery+

formula

KaTeX rendered

\begin{aligned}\text{H = y1 (r\^{}N - 1) / (r - 1)}\\[0.35em]\text{y\_N = y1 r\^{}(N-1)}\end{aligned}

ASCII source

H = y1 (r^N - 1) / (r - 1), y_N = y1 r^(N-1)

first layer height (m)layersgrowth ratio

rounded layers

last layer height (m)

0.0004

total prism height (m)

0.0026

Pair this with the y+ calculator: first set the wall-normal first-cell height, then choose growth and layer count.

mesh boundary layer prism layer y+