Abstract
dc:descriptionIt is established that there is a subgrid model for large-eddy simulation (LES) of turbulence that is provably ideal in at least two important senses: a simulation using the ideal model matches all spatial statistics and minimizes error in the large-scale dynamics. However, the ideal model embodies a tremendous amount of information, making it impractical to determine. Instead, it must be approximated. The ideal subgrid model is approximated with a simple class of stochastic estimates, and the resulting optimal models retain some of the statistical properties of the ideal model. Statistics required to find the optimal subgrid models are computed from realizations of a direct numerical simulation (DNS) of forced isotropic turbulence with microscale Reynolds number Rlambda = 164. Optimal models are studied for two LES representations.
Degree
thesis:*- Name thesis:degree_name
- Ph.D.
- Level thesis:degree_level
- Dissertation
- Discipline thesis:degree_discipline
- Mechanical Engineering
- Grantor
- University of Illinois at Urbana-Champaign
- Year dc:date
- 2015
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Langford, Jacob Anthony
- Contributors dc:contributor
-
- Moser, Robert D.
Subjects
dc:subject × 2Rights
- Language dc:language
- eng
Identifiers
dc:identifier.*- Identifier
- (UMI)AAI9990213
- OAI identifier oai:identifier
- oai:www.ideals.illinois.edu:2142/77690