The instability of two-dimensional laminar separation.

L. L. Pauley; P. Moin; W. C. Reynolds

doi:10.1007/978-3-642-84010-4_7

The instability of two-dimensional laminar separation.

L. L. Pauley, P. Moin, W. C. Reynolds

Mechanical Engineering

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

2 Scopus citations

Abstract

Studies the separation of a two-dimensional laminar boundary layer under the influence of an external adverse pressure gradient. A fraction timestep method was used, and three different Reynolds numbers were studied. Calculations for several suction strengths showed that above a critical suction strength of 0.12 (all Reynolds numbers) shedding of discrete vortices was evident. Examination of the unsteady separation structure showed that the frequency of shedding was influenced by the Reynolds number but not by the strength of the pressure gradient. The vortex shedding appears dominated by an inviscid instability. Study of the time averaged separation bubbles indicates that the bubbles have a structure similar to laminar separation bubbles produced in experiment. (C.J.U.)

Original language	English (US)
Title of host publication	LOW REYNOLDS NUMBER AERODYNAMICS. PROC. CONF., NOTRE DAME, U.S.A., JUNE 5-7, 1989 }EDITED BY T.J. MUELLER]. (LECTURE NOTES IN
Publisher	Berlin, Germany, Springer-Verlag
Pages	82-92
Number of pages	11
Edition	54 ), Berlin, Germany, Springer-Verlag, 1989
ISBN (Print)	0387518843, 9780387518848
DOIs	https://doi.org/10.1007/978-3-642-84010-4_7
State	Published - Jan 1 1989

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Engineering(all)

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10.1007/978-3-642-84010-4_7

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Pauley, L. L., Moin, P., & Reynolds, W. C. (1989). The instability of two-dimensional laminar separation. In LOW REYNOLDS NUMBER AERODYNAMICS. PROC. CONF., NOTRE DAME, U.S.A., JUNE 5-7, 1989 }EDITED BY T.J. MUELLER]. (LECTURE NOTES IN (54 ), Berlin, Germany, Springer-Verlag, 1989 ed., pp. 82-92). Berlin, Germany, Springer-Verlag. https://doi.org/10.1007/978-3-642-84010-4_7

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abstract = "Studies the separation of a two-dimensional laminar boundary layer under the influence of an external adverse pressure gradient. A fraction timestep method was used, and three different Reynolds numbers were studied. Calculations for several suction strengths showed that above a critical suction strength of 0.12 (all Reynolds numbers) shedding of discrete vortices was evident. Examination of the unsteady separation structure showed that the frequency of shedding was influenced by the Reynolds number but not by the strength of the pressure gradient. The vortex shedding appears dominated by an inviscid instability. Study of the time averaged separation bubbles indicates that the bubbles have a structure similar to laminar separation bubbles produced in experiment. (C.J.U.)",

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The instability of two-dimensional laminar separation. / Pauley, L. L.; Moin, P.; Reynolds, W. C.
LOW REYNOLDS NUMBER AERODYNAMICS. PROC. CONF., NOTRE DAME, U.S.A., JUNE 5-7, 1989 }EDITED BY T.J. MUELLER]. (LECTURE NOTES IN. 54 ), Berlin, Germany, Springer-Verlag, 1989. ed. Berlin, Germany, Springer-Verlag, 1989. p. 82-92.

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

TY - CHAP

T1 - The instability of two-dimensional laminar separation.

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AU - Moin, P.

AU - Reynolds, W. C.

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N2 - Studies the separation of a two-dimensional laminar boundary layer under the influence of an external adverse pressure gradient. A fraction timestep method was used, and three different Reynolds numbers were studied. Calculations for several suction strengths showed that above a critical suction strength of 0.12 (all Reynolds numbers) shedding of discrete vortices was evident. Examination of the unsteady separation structure showed that the frequency of shedding was influenced by the Reynolds number but not by the strength of the pressure gradient. The vortex shedding appears dominated by an inviscid instability. Study of the time averaged separation bubbles indicates that the bubbles have a structure similar to laminar separation bubbles produced in experiment. (C.J.U.)

AB - Studies the separation of a two-dimensional laminar boundary layer under the influence of an external adverse pressure gradient. A fraction timestep method was used, and three different Reynolds numbers were studied. Calculations for several suction strengths showed that above a critical suction strength of 0.12 (all Reynolds numbers) shedding of discrete vortices was evident. Examination of the unsteady separation structure showed that the frequency of shedding was influenced by the Reynolds number but not by the strength of the pressure gradient. The vortex shedding appears dominated by an inviscid instability. Study of the time averaged separation bubbles indicates that the bubbles have a structure similar to laminar separation bubbles produced in experiment. (C.J.U.)

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PB - Berlin, Germany, Springer-Verlag

ER -

The instability of two-dimensional laminar separation.

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