### Abstract

Large eddy simulation (LES) has been applied to prediction of the turbulent boundary layer over a bump. The bump is formed by a prolonged convex surface with two additional short concave surfaces fore and aft; the chordto-height ratio is 15.2:1. A canonical flat plate turbulent boundary layer at a momentum thickness Reynolds number 1,500 is introduced five bump heights upstream of the onset of curvature. The boundary layer is then subject to three changes in sign of streamwise pressure gradient and four changes in sign of surface curvature. The filtered incompressible Navier-Stokes equations are solved using the fractional step method; subgrid scale (SGS) stresses are parameterized using the dynamic eddy viscosity model of Germano et al. (1991). LES predictions of mean velocity and turbulence intensities are in good agreement with the experimental measurements of Webster et al. (1996), though the computed Reynolds shear stress is consistently higher than the measured values.

Original language | English (US) |
---|---|

Title of host publication | American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED |

Pages | 583-588 |

Number of pages | 6 |

Volume | 237 |

State | Published - 1996 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Engineering(all)

### Cite this

*American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED*(Vol. 237, pp. 583-588)

**Large eddy simulation of the turbulent flow over a bump.** / Wu, Xiaohua; Squires, Kyle.

Research output: Chapter in Book/Report/Conference proceeding › Chapter

*American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED.*vol. 237, pp. 583-588.

}

TY - CHAP

T1 - Large eddy simulation of the turbulent flow over a bump

AU - Wu, Xiaohua

AU - Squires, Kyle

PY - 1996

Y1 - 1996

N2 - Large eddy simulation (LES) has been applied to prediction of the turbulent boundary layer over a bump. The bump is formed by a prolonged convex surface with two additional short concave surfaces fore and aft; the chordto-height ratio is 15.2:1. A canonical flat plate turbulent boundary layer at a momentum thickness Reynolds number 1,500 is introduced five bump heights upstream of the onset of curvature. The boundary layer is then subject to three changes in sign of streamwise pressure gradient and four changes in sign of surface curvature. The filtered incompressible Navier-Stokes equations are solved using the fractional step method; subgrid scale (SGS) stresses are parameterized using the dynamic eddy viscosity model of Germano et al. (1991). LES predictions of mean velocity and turbulence intensities are in good agreement with the experimental measurements of Webster et al. (1996), though the computed Reynolds shear stress is consistently higher than the measured values.

AB - Large eddy simulation (LES) has been applied to prediction of the turbulent boundary layer over a bump. The bump is formed by a prolonged convex surface with two additional short concave surfaces fore and aft; the chordto-height ratio is 15.2:1. A canonical flat plate turbulent boundary layer at a momentum thickness Reynolds number 1,500 is introduced five bump heights upstream of the onset of curvature. The boundary layer is then subject to three changes in sign of streamwise pressure gradient and four changes in sign of surface curvature. The filtered incompressible Navier-Stokes equations are solved using the fractional step method; subgrid scale (SGS) stresses are parameterized using the dynamic eddy viscosity model of Germano et al. (1991). LES predictions of mean velocity and turbulence intensities are in good agreement with the experimental measurements of Webster et al. (1996), though the computed Reynolds shear stress is consistently higher than the measured values.

UR - http://www.scopus.com/inward/record.url?scp=0030370176&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030370176&partnerID=8YFLogxK

M3 - Chapter

AN - SCOPUS:0030370176

VL - 237

SP - 583

EP - 588

BT - American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED

ER -