Investigation of three-dimensional internal and external flow separation

A. Gross, R. Jacobi, Hermann F Fasel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Flow separation is always three-dimensional despite the fact that most of the past research has focused on two-dimensional separation. The three-dimensional character of separation is particularly relevant when low-aspect ratio geometries are considered. Separation is often associated with unsteadiness, which is caused by large coherent structures that are a consequence of hydrodynamic instability mechanisms of the mean-flow. We are employing direct numerical simulations for investigating the highly-complex flow physics of three-dimensional laminar separation bubbles. The introduction of pulse disturbances allows us to probe the instability mechanisms. In parallel, we are also employing hybrid turbulence models for simulations of the turbulent flow through a square-duct, and for the Stanford University asymmetric diffuser experiments. By advancing the understanding of the fundamental mechanisms governing three-dimensional separation and by devising modeling strategies for high-Reynolds number flows, we are laying the foundation that may lead to better predictive tools and to separation control devices for practical applications.

Original languageEnglish (US)
Title of host publicationProceedings - 2010 DoD High Performance Computing Modernization Program Users Group Conference, HPCMP UGC 2010
Pages45-53
Number of pages9
DOIs
StatePublished - 2011
Event2010 DoD High Performance Computing Modernization Program Users Group Conference, HPCMP UGC 2010 - Schaumburg, IL, United States
Duration: Jun 14 2010Jun 17 2010

Other

Other2010 DoD High Performance Computing Modernization Program Users Group Conference, HPCMP UGC 2010
CountryUnited States
CitySchaumburg, IL
Period6/14/106/17/10

Fingerprint

Flow separation
Direct numerical simulation
Turbulence models
Ducts
Turbulent flow
Aspect ratio
Reynolds number
Hydrodynamics
Physics
Geometry
Experiments

Keywords

  • coherent structures
  • diffuser
  • hybrid turbulence model
  • separation
  • square-duct
  • three-dimensional

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Computer Science Applications

Cite this

Gross, A., Jacobi, R., & Fasel, H. F. (2011). Investigation of three-dimensional internal and external flow separation. In Proceedings - 2010 DoD High Performance Computing Modernization Program Users Group Conference, HPCMP UGC 2010 (pp. 45-53). [6017997] https://doi.org/10.1109/HPCMP-UGC.2010.10

Investigation of three-dimensional internal and external flow separation. / Gross, A.; Jacobi, R.; Fasel, Hermann F.

Proceedings - 2010 DoD High Performance Computing Modernization Program Users Group Conference, HPCMP UGC 2010. 2011. p. 45-53 6017997.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Gross, A, Jacobi, R & Fasel, HF 2011, Investigation of three-dimensional internal and external flow separation. in Proceedings - 2010 DoD High Performance Computing Modernization Program Users Group Conference, HPCMP UGC 2010., 6017997, pp. 45-53, 2010 DoD High Performance Computing Modernization Program Users Group Conference, HPCMP UGC 2010, Schaumburg, IL, United States, 6/14/10. https://doi.org/10.1109/HPCMP-UGC.2010.10
Gross A, Jacobi R, Fasel HF. Investigation of three-dimensional internal and external flow separation. In Proceedings - 2010 DoD High Performance Computing Modernization Program Users Group Conference, HPCMP UGC 2010. 2011. p. 45-53. 6017997 https://doi.org/10.1109/HPCMP-UGC.2010.10
Gross, A. ; Jacobi, R. ; Fasel, Hermann F. / Investigation of three-dimensional internal and external flow separation. Proceedings - 2010 DoD High Performance Computing Modernization Program Users Group Conference, HPCMP UGC 2010. 2011. pp. 45-53
@inproceedings{0b9e9b6f119246fe87421758f3b47b42,
title = "Investigation of three-dimensional internal and external flow separation",
abstract = "Flow separation is always three-dimensional despite the fact that most of the past research has focused on two-dimensional separation. The three-dimensional character of separation is particularly relevant when low-aspect ratio geometries are considered. Separation is often associated with unsteadiness, which is caused by large coherent structures that are a consequence of hydrodynamic instability mechanisms of the mean-flow. We are employing direct numerical simulations for investigating the highly-complex flow physics of three-dimensional laminar separation bubbles. The introduction of pulse disturbances allows us to probe the instability mechanisms. In parallel, we are also employing hybrid turbulence models for simulations of the turbulent flow through a square-duct, and for the Stanford University asymmetric diffuser experiments. By advancing the understanding of the fundamental mechanisms governing three-dimensional separation and by devising modeling strategies for high-Reynolds number flows, we are laying the foundation that may lead to better predictive tools and to separation control devices for practical applications.",
keywords = "coherent structures, diffuser, hybrid turbulence model, separation, square-duct, three-dimensional",
author = "A. Gross and R. Jacobi and Fasel, {Hermann F}",
year = "2011",
doi = "10.1109/HPCMP-UGC.2010.10",
language = "English (US)",
isbn = "9780769543925",
pages = "45--53",
booktitle = "Proceedings - 2010 DoD High Performance Computing Modernization Program Users Group Conference, HPCMP UGC 2010",

}

TY - GEN

T1 - Investigation of three-dimensional internal and external flow separation

AU - Gross, A.

AU - Jacobi, R.

AU - Fasel, Hermann F

PY - 2011

Y1 - 2011

N2 - Flow separation is always three-dimensional despite the fact that most of the past research has focused on two-dimensional separation. The three-dimensional character of separation is particularly relevant when low-aspect ratio geometries are considered. Separation is often associated with unsteadiness, which is caused by large coherent structures that are a consequence of hydrodynamic instability mechanisms of the mean-flow. We are employing direct numerical simulations for investigating the highly-complex flow physics of three-dimensional laminar separation bubbles. The introduction of pulse disturbances allows us to probe the instability mechanisms. In parallel, we are also employing hybrid turbulence models for simulations of the turbulent flow through a square-duct, and for the Stanford University asymmetric diffuser experiments. By advancing the understanding of the fundamental mechanisms governing three-dimensional separation and by devising modeling strategies for high-Reynolds number flows, we are laying the foundation that may lead to better predictive tools and to separation control devices for practical applications.

AB - Flow separation is always three-dimensional despite the fact that most of the past research has focused on two-dimensional separation. The three-dimensional character of separation is particularly relevant when low-aspect ratio geometries are considered. Separation is often associated with unsteadiness, which is caused by large coherent structures that are a consequence of hydrodynamic instability mechanisms of the mean-flow. We are employing direct numerical simulations for investigating the highly-complex flow physics of three-dimensional laminar separation bubbles. The introduction of pulse disturbances allows us to probe the instability mechanisms. In parallel, we are also employing hybrid turbulence models for simulations of the turbulent flow through a square-duct, and for the Stanford University asymmetric diffuser experiments. By advancing the understanding of the fundamental mechanisms governing three-dimensional separation and by devising modeling strategies for high-Reynolds number flows, we are laying the foundation that may lead to better predictive tools and to separation control devices for practical applications.

KW - coherent structures

KW - diffuser

KW - hybrid turbulence model

KW - separation

KW - square-duct

KW - three-dimensional

UR - http://www.scopus.com/inward/record.url?scp=80053346473&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80053346473&partnerID=8YFLogxK

U2 - 10.1109/HPCMP-UGC.2010.10

DO - 10.1109/HPCMP-UGC.2010.10

M3 - Conference contribution

AN - SCOPUS:80053346473

SN - 9780769543925

SP - 45

EP - 53

BT - Proceedings - 2010 DoD High Performance Computing Modernization Program Users Group Conference, HPCMP UGC 2010

ER -