Delaying transition in rotating boundary-layer flows

Paul T. Griffiths; Stephen J. Garrett; S. O.  Stephen

Delaying transition in rotating boundary-layer flows

Paul T. Griffiths, Stephen J. Garrett, S. O. Stephen

College of Engineering and Physical Sciences

Research output: Chapter in Book/Published conference output › Conference publication

Abstract

We investigate both the type I and II modes of stationary instability within the boundary-layer flow over a rotating disk. Extending the work of previous studies we find that the flow can be stabilised via the introduction of shear-thinning non-Newtonian fluids. Laminar-flow profiles are determined from a generalised von K ́arm ́an similarity solution. An asymptotic study is presented in the limit of large Reynolds number and a numerical investigation which includes the effects of streamline curvature and Coriolis force is also conducted. Favourable agreement is obtained between solutions from the two schemes. Results indicate that the transition process from laminar to turbulent flow can be significantly delayed, in this case at least. Such a study is presented with a view to suggesting potential control
mechanisms in aerodynamically-significant flows.

Original language	English
Title of host publication	Proceedings of the 45th AIAA Fluid Dynamics Conference
Publisher	American Institute of Aeronautics and Astronautics Inc. (AIAA)
Number of pages	6
ISBN (Print)	9781624103629
Publication status	Published - 2015

Cite this

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title = "Delaying transition in rotating boundary-layer flows",

abstract = "We investigate both the type I and II modes of stationary instability within the boundary-layer flow over a rotating disk. Extending the work of previous studies we find that the flow can be stabilised via the introduction of shear-thinning non-Newtonian fluids. Laminar-flow profiles are determined from a generalised von K{\' }arm{\' }an similarity solution. An asymptotic study is presented in the limit of large Reynolds number and a numerical investigation which includes the effects of streamline curvature and Coriolis force is also conducted. Favourable agreement is obtained between solutions from the two schemes. Results indicate that the transition process from laminar to turbulent flow can be significantly delayed, in this case at least. Such a study is presented with a view to suggesting potential controlmechanisms in aerodynamically-significant flows.",

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year = "2015",

language = "English",

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TY - GEN

T1 - Delaying transition in rotating boundary-layer flows

AU - Griffiths, Paul T.

AU - Garrett, Stephen J.

AU - Stephen, S. O.

PY - 2015

Y1 - 2015

N2 - We investigate both the type I and II modes of stationary instability within the boundary-layer flow over a rotating disk. Extending the work of previous studies we find that the flow can be stabilised via the introduction of shear-thinning non-Newtonian fluids. Laminar-flow profiles are determined from a generalised von K ́arm ́an similarity solution. An asymptotic study is presented in the limit of large Reynolds number and a numerical investigation which includes the effects of streamline curvature and Coriolis force is also conducted. Favourable agreement is obtained between solutions from the two schemes. Results indicate that the transition process from laminar to turbulent flow can be significantly delayed, in this case at least. Such a study is presented with a view to suggesting potential controlmechanisms in aerodynamically-significant flows.

AB - We investigate both the type I and II modes of stationary instability within the boundary-layer flow over a rotating disk. Extending the work of previous studies we find that the flow can be stabilised via the introduction of shear-thinning non-Newtonian fluids. Laminar-flow profiles are determined from a generalised von K ́arm ́an similarity solution. An asymptotic study is presented in the limit of large Reynolds number and a numerical investigation which includes the effects of streamline curvature and Coriolis force is also conducted. Favourable agreement is obtained between solutions from the two schemes. Results indicate that the transition process from laminar to turbulent flow can be significantly delayed, in this case at least. Such a study is presented with a view to suggesting potential controlmechanisms in aerodynamically-significant flows.

M3 - Conference publication

SN - 9781624103629

BT - Proceedings of the 45th AIAA Fluid Dynamics Conference

PB - American Institute of Aeronautics and Astronautics Inc. (AIAA)

ER -

Delaying transition in rotating boundary-layer flows

Abstract

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