Numerical Investigation of 3-D Separation: DNS, LES and URANS

Abstract

For Navy relevant geometries, separation of wall bounded flows is a highly complex phenomenon. The combination of three-dimensionality and unsteadiness results in a highly complex time-dependent topology of the separated region. In a combined numerical/experimental effort we investigated laminar separation bubbles in external flows. We employed highly-resolved direct numerical simulations to obtain a deeper understanding of the various physical mechanism governing separation, transition, and reattachment. We also carried out and hybrid RANS/LES simulations for a turbulent square-duct and the Stanford University asymmetric diffuser.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2010
Accession Number
ADA519795

Entities

People

  • A. Gross
  • A. Kremheller
  • H. F. Fasel
  • R. Jacobi

Organizations

  • University of Arizona

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Geometry
  • Hydrodynamics
  • Mechanical Properties
  • Physics Laboratories
  • Pressure Distribution
  • Secondary Flow
  • Three Dimensional
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Mechanics and Fluid Dynamics.