Accession Number:
ADP013656
Title:
Filtering Boundary Conditions for LES and Embedded Boundary Simulations
Descriptive Note:
Conference paper
Corporate Author:
ILLINOIS UNIV AT URBANA DEPT OF THEORETICAL AND APPLIED MECHANICS
Personal Author(s):
Report Date:
2001-08-01
Pagination or Media Count:
8.0
Abstract:
Two related observations lead us to propose a new approach for embedding boundaries in the context of LES. In this approach, we treat the wall by filtering through it. A homogeneous or nearly homogeneous filter is applied to the flow field including the embedded boundary. As a result, the boundary is no longer a sharp interface, but is diffused across the filter width. To recover a Direct Numerical Simulation DNS, the filter width is made small enough to resolve all relevant scales of motion, but remains finite so that the boundary is not a sharp interface. In LES, the scale on which the boundary is resolved is consistent with the resolved scales of motion.
Descriptors:
Subject Categories:
- Fluid Mechanics