For analyzing headboxes, approach piping, and other fluid systems,
Glens Falls Interweb, Inc. uses flow modeling software from Fluent.
Fluent's unstructured meshbased CFD software provides a stateoftheart
selection of turbulence closures from twoequation k
models to Reynolds stress models or large eddy simulations.
The two or threedimensional models are created in Fluent's GAMBIT
preprocessor where mesh is generated and boundary conditions are
defined.
As depicted in the adjacent windows, a threedimensional CFD model
was developed to calculate the flows in the parabolic tapered manifold
and subsequent tube bundle for a new hydraulic headbox. Using results
from this model, the effect of the manifold pressure profile and
tube entry conditions on the CD uniformity of the exiting flow distribution
was calculated.
Fluid flow modeling has been used by GFI for the prediction of:
 Velocity profiles
 Flow separation & recirculation
 Turbulence intensity & energy
 Secondary flow patterns
 Pressure drop/loss
