Numerical simulation of nonlinear waves in the wake of an axisymmetric bluff body

V. Schwarz; H. Bestek; H. Fasel

Numerical simulation of nonlinear waves in the wake of an axisymmetric bluff body

V. Schwarz, H. Bestek, H. Fasel

Aerospace and Mechanical Engineering

Research output: Contribution to conference › Paper › peer-review

11 Scopus citations

Abstract

The streamwise evolution of three-dimensional disturbances in the wake of a cylindrical, axisymmetric bluff body is investigated using direct numerical simulations based on the complete Navier-Stokes equations. In addition to the Navier-Stokes simulations linear stability analysis was applied to de-termine local stability characteristics of the steady axisymmetric base flow. In this paper the results from simulations at two different Reynolds numbers Re_D = 1000 (case A) and Re_D=500 (case B) (based on the body diameter and freestream velocity) are analyzed and compared in detail. For case A the temporal behaviour of the flow field suggests the onset of deterministic chaos in the wake, while the temporal behaviour for case B was found to be periodic over a long time.

Original language	English (US)
State	Published - 1994
Event	AIAA Fluid Dynamics Conference, 1994 - Colorado Springs, United States Duration: Jun 20 1994 → Jun 23 1994

Other

Other	AIAA Fluid Dynamics Conference, 1994
Country/Territory	United States
City	Colorado Springs
Period	6/20/94 → 6/23/94

ASJC Scopus subject areas

Aerospace Engineering
Engineering (miscellaneous)

Cite this

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title = "Numerical simulation of nonlinear waves in the wake of an axisymmetric bluff body",

abstract = "The streamwise evolution of three-dimensional disturbances in the wake of a cylindrical, axisymmetric bluff body is investigated using direct numerical simulations based on the complete Navier-Stokes equations. In addition to the Navier-Stokes simulations linear stability analysis was applied to de-termine local stability characteristics of the steady axisymmetric base flow. In this paper the results from simulations at two different Reynolds numbers ReD = 1000 (case A) and ReD=500 (case B) (based on the body diameter and freestream velocity) are analyzed and compared in detail. For case A the temporal behaviour of the flow field suggests the onset of deterministic chaos in the wake, while the temporal behaviour for case B was found to be periodic over a long time.",

author = "V. Schwarz and H. Bestek and H. Fasel",

year = "1994",

language = "English (US)",

note = "AIAA Fluid Dynamics Conference, 1994 ; Conference date: 20-06-1994 Through 23-06-1994",

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TY - CONF

T1 - Numerical simulation of nonlinear waves in the wake of an axisymmetric bluff body

AU - Schwarz, V.

AU - Bestek, H.

AU - Fasel, H.

PY - 1994

Y1 - 1994

N2 - The streamwise evolution of three-dimensional disturbances in the wake of a cylindrical, axisymmetric bluff body is investigated using direct numerical simulations based on the complete Navier-Stokes equations. In addition to the Navier-Stokes simulations linear stability analysis was applied to de-termine local stability characteristics of the steady axisymmetric base flow. In this paper the results from simulations at two different Reynolds numbers ReD = 1000 (case A) and ReD=500 (case B) (based on the body diameter and freestream velocity) are analyzed and compared in detail. For case A the temporal behaviour of the flow field suggests the onset of deterministic chaos in the wake, while the temporal behaviour for case B was found to be periodic over a long time.

AB - The streamwise evolution of three-dimensional disturbances in the wake of a cylindrical, axisymmetric bluff body is investigated using direct numerical simulations based on the complete Navier-Stokes equations. In addition to the Navier-Stokes simulations linear stability analysis was applied to de-termine local stability characteristics of the steady axisymmetric base flow. In this paper the results from simulations at two different Reynolds numbers ReD = 1000 (case A) and ReD=500 (case B) (based on the body diameter and freestream velocity) are analyzed and compared in detail. For case A the temporal behaviour of the flow field suggests the onset of deterministic chaos in the wake, while the temporal behaviour for case B was found to be periodic over a long time.

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M3 - Paper

AN - SCOPUS:84997712973

T2 - AIAA Fluid Dynamics Conference, 1994

Y2 - 20 June 1994 through 23 June 1994

ER -

Numerical simulation of nonlinear waves in the wake of an axisymmetric bluff body

Abstract

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