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Effect of small asymmetries on axisymmetric stenotic flow

  • Martin D. Griffith (a1), Thomas Leweke (a2), Mark C. Thompson (a1) and Kerry Hourigan (a1)

Abstract

Flow through axisymmetric and eccentric sinuous stenoses is investigated numerically, for Reynolds numbers up to 400. The eccentricity consists of an offset of the stenosis throat. A range of stenosis eccentricity is tested; the wake flow is found to be highly sensitive to small eccentricities in the stenosis geometry, even with stenosis offsets of the order of the machining precision of experimental test-sections. Comparisons are made between the numerically simulated flow through stenoses with small eccentricities and results from the literature of non-axisymmetric flows through nominally axisymmetric geometries. The effect of distortion to the inlet Poiseuille velocity profile is also investigated and found to have a significantly less severe effect on the downstream wake flow than geometric eccentricity.

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Email address for correspondence: martin.griffith@eng.monash.edu.au

References

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Ahmed, S. A. & Giddens, D. P. 1983 Velocity measurements in steady flow through axisymmetric stenoses at moderate Reynolds numbers. J. Biomech. 16, 505516.
Brons, M., Shen, W. Z., Sorensen, J. N. & Zhu, W. J. 2007 The influence of imperfections on the flow structure of steady vortex breakdown bubbles. J. Fluid Mech. 578, 453466.
Brons, M., Thompson, M. C. & Hourigan, K. 2009 Dye visualization near a three-dimensional stagnation point: application to the vortex breakdown bubble. J. Fluid Mech. 622, 177194.
Cantwell, C. D., Barkley, D. & Blackburn, H. M. 2010 Transient growth analysis of flow through a sudden expansion in a circular pipe. Phys. Fluids 22, 034101.
Fearn, R. M., Mullin, T. & Cliffe, K. A. 1990 Nonlinear flow phenomena in a symmetric sudden expansion. J. Fluid Mech. 211, 595608.
Griffith, M. D., Leweke, T., Thompson, M. C. & Hourigan, K. 2008 Steady inlet flow in stenotic geometries: convective and absolute instabilities. J. Fluid Mech. 616, 111133.
Griffith, M. D., Thompson, M. C., Leweke, T. & Hourigan, K. 2010 Convective instability in steady stenotic flow: optimal transient growth and experimental observation. J. Fluid Mech. 655, 504514.
Griffith, M. D., Thompson, M. C., Leweke, T., Hourigan, K. & Anderson, W. P. 2007 Wake behaviour and instability of flow through a partially blocked channel. J. Fluid Mech. 582, 319340.
Karniadakis, G. E. & Sherwin, S. J. 1999 Spectral/hp Element Methods for CFD, 1st edn. Oxford University Press.
Mao, X., Blackburn, H. M. & Sherwin, S. J. 2012 Optimal inflow boundary condition perturbations in steady stenotic flow. J. Fluid Mech. 705, 306321.
Peterson, S. D. & Plesniak, M. W. 2008 The influence of inlet velocity profile and secondary flow on pulsatile flow in a model artery with stenosis. J. Fluid Mech. 616, 263301.
Sanmiguel-Rojas, E. & Mullin, T. 2012 Finite-amplitude solutions in the flow through a sudden expansion in a circular pipe. J. Fluid Mech. 691, 201213.
Sanmiguel-Rojas, E., del Pino, C. & Gutiérrez-Montes, C. 2010 Global mode analysis of a pipe flow through a 1:2 axisymmetric sudden expansion. Phys. Fluids 22, 071702.
Sherwin, S. J. & Blackburn, H. M. 2005 Three-dimensional instabilities of steady and pulsatile axisymmetric stenotic flows. J. Fluid Mech. 533, 297327.
Sorensen, J. N. & Christensen, E. A. 1995 Direct numerical simulation of rotating fluid flow in a closed cylinder. Phys. Fluids 7, 764778.
Spohn, A., Mory, M. & Hopfinger, E. J. 1998 Experiments on vortex breakdown in a confined flow generated by a rotating disc. J. Fluid Mech. 370, 7399.
Thompson, M. C. & Hourigan, K. 2003 The sensitivity of steady vortex breakdown bubbles in confined cylinder flows to rotating lid misalignment. J. Fluid Mech. 496, 129138.
Varghese, S. S., Frankel, S. H. & Fischer, P. F. 2007 Direct numerical simulation of stenotic flows. Part 1. Steady flow. J. Fluid Mech. 582, 253280.
Vétel, J., Garon, A., Pelletier, D. & Farinas, M.-I. 2008 Asymmetry and transition to turbulence in a smooth axisymmetric constriction. J. Fluid Mech. 607, 351386.
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Effect of small asymmetries on axisymmetric stenotic flow

  • Martin D. Griffith (a1), Thomas Leweke (a2), Mark C. Thompson (a1) and Kerry Hourigan (a1)

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