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.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE