Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
498630 | Computer Methods in Applied Mechanics and Engineering | 2011 | 12 Pages |
Abstract
We present a numerical study of the NS-αβ model, which is a recently proposed multiscale variation of the NS-α model that attempts to recapture scales lost through over-regularization by separately modeling dissipation-range scales. We develop a similarity theory for the new model which shows that it is better equipped than the NS-α model to capture smaller-scale behavior. Next, we propose and study an unconditionally stable, optimally accurate, and efficient finite-element implementation for the NS-αβ model; rigorous proofs for stability and convergence are provided. Finally, we present results from two numerical experiments that demonstrate the advantages of the NS-αβ model over the NS-α model.
Related Topics
Physical Sciences and Engineering
Computer Science
Computer Science Applications
Authors
Tae-Yeon Kim, Monika Neda, Leo G. Rebholz, Eliot Fried,