Project Title:
A Mathematically Based Reynolds-Stress Model of Turbulence
02.01-9457A
911876
A Mathematically Based Reynolds-Stress Model of Turbulence
Nielsen Engineering & Research, Inc.
510 Clyde Avenue
Mountain View
CA
94043-2287
Robert E.
Childs
415-968-9457
ARC
NAS2-13515
010
02.01-9457A
911876
Abstract:
Turbulence modeling is a critical element in most computational fluid dynamics calculations
in all speed ranges, from subsonic to hypersonic. However, existing models are inadequate
for large classes of flows. An example of this would be flows with large regions
of separation and three-dimensional flows. The inadequacy of these turbulence models
can be attributed to the heuristic reasoning that is used in the model derivation.
The goal of this project is to develop a mathematically (as opposed to heuristically)
based model that is self-consistent and from which error bounds can be deduced. The
approach will use Duhamel's equation to derive an expression for the terms which
must be modeled in normal Reynolds-stress transport models.
Improved turbulence models will benefit aircraft and automobile manufacturers and
chemical and food processors.
fluid flow, turbulence modeling