Shear Wave Generation from Overdriven Cavities in Rock
Abstract
During the period of this award, the basic structure-based model for rapid distortions of homogeneous turbulence was extended to deal with slow distortions and inhomegeneities. A computer program was written to study the extended model in free-shear flows. The model was installed in NASA's INS2D code for generalized flow analysis. Mr. Maire carried out this work as part of his Phd) research. During the award period we began to explore ways to simplify the structure-based modeling so that it could be used in repetitive engineering calculations. The idea is to use an algebraic version of the model that, gives the turbulent, streses in terms of the mean strain rate and mean and frame rotation rates as an alternative to the linear or non linear s/res strain relationships used in conventional two equation modeling. The difference would be that the algebraic structure-based turbulence model (ASBM) would do a much better job of representing the streses in complex flows. Development of this concept into a working engineering model and codes will be the principal objective under subsequent awards.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 08, 2000
- Accession Number
- ADA385078
Entities
People
- Charles C. Liu
- Thomas J. Ahuens
Organizations
- California Institute of Technology