Viscous Grid Spacing Calculator

This page provides a worksheet for estimating the normal spacing to be used in a viscous CFD grid. Estimates are for a turbulent flat plate in free air and are based on the Sutherland formula for viscosity.

What information do you have?
Reynolds Number
Mach, Q, To
Total conditions


For a given Reynolds number, Mach number and desired y+ value, this page will estimate the spacing normal to a solid surface required to yield 1 grid point in the laminar sublayer.


INPUT OUTPUT
Re (×106) ds=inches (meters)

Ref. Length
y+







For a given Mach number, dynamic pressure, and desired y+ value, this page will estimate the spacing normal to a solid surface required to yield 1 grid point in the laminar sublayer.


INPUT OUTPUT
Mach ds=inches (meters)

Po=psi (N/m²)

Re= (×106)
Q
To
Ref. Length
y+








For a given flow total conditions and desired y+ value, this page will estimate the spacing normal to a solid surface required to yield 1 grid point in the laminar sublayer.


INPUT OUTPUT
Po
ds=inches (meters)

Q =psi (N/m²)

Re= (×106)
To
Mach
y+
Ref. Length

Last Updated Thu Jul 3 09:59:14 EDT 1997 by
Bill Jones
(w.t.jones@nasa.gov)
Javascript by Willam T. Jones