Imperial College London

ProfessorSpencerSherwin

Faculty of EngineeringDepartment of Aeronautics

Professor of Computational Fluid Mechanics
 
 
 
//

Contact

 

+44 (0)20 7594 5052s.sherwin Website

 
 
//

Location

 

313BCity and Guilds BuildingSouth Kensington Campus

//

Summary

 

Publications

Publication Type
Year
to

332 results found

Broadhurst MS, Theofilis V, Sherwin SJ, 2006, Spectral element stability analysis of vortical flows, 6th IUTAM Symposium on Laminar-Turbulent Transition, 13 - 17 December 2004, Bangalore, INDIA, Publisher: Springer, Pages: 153-158

Conference paper

Broadhurst M, 2006, Vortex Stability and Breakdown: Direct Numerical Simulation and Stability Analysis using BiGlobal and Parabolised Formulations

This thesis concerns the application and implementation of recently developed stability techniques to the understanding of vortex stability and breakdown. The instability anal- ysis of vortical flows was originally motivated by a need to understand the breakdown of aircraft wake vortices and the physics of the vortex breakdown phenomenon. A more recent application is the stability analysis of the vortex wake developed from a Formula 1 front wing. Typically, the model problem when considering vortex dominated flows is the Batch- elor trailing vortex. The results of a BiGlobal linear stability analysis of a Batchelor vortex show that there are many unstable helical perturbation modes covering a wide range of axial wavenumbers. Direct numerical simulation of a corresponding unstable helical distur- bance developing on an axially periodic vortex demonstrates a non-linear energy transfer mechanism responsible for a loss of energy in the mean flow. Relaxing the assumption of periodicity allows axial gradients to develop, and leads to an abrupt drop in axial velocity indicative of vortex breakdown. Direct numerical simulations of a vortex in external pres- sure gradients also suggests that axial pressure gradients significantly influence the onset of vortex breakdown. With a BiGlobal stability analysis assuming axial homogeneity and neglecting streamwise gradients, this motivates the need for an analysis technique that can account for both velocity and pressure gradients. One such technique is the parabolised stability equations, and the current research has successfully implemented this technique and demonstrated its validity by comparing the results with direct numerical simulation.

Thesis dissertation

Sherwin SJ, Eskilsson C, 2006, Spectral/hp discontinuous Galerkin methods for modelling 2D Boussinesq equations, Journal of Computational Physics, Vol: 212, Pages: 566-589, ISSN: 0021-9991

Journal article

Giordana S, Sherwin SJ, Peiro J, Doorly DJ, Crane JS, Lee KE, Cheshire NJW, Carco CGet al., 2005, Local and global geometric influence on steady flow in distal anastomoses of peripheral bypass grafts, JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME, Vol: 127, Pages: 1087-1098, ISSN: 0148-0731

Journal article

Gambaruto AM, Radaelli A, Doorly DJ, Sherwin SJ, Peiro Jet al., 2005, Sensitivity study on by-pass graft reconstruction with emphasis on flow solutions, Pages: 832-833

Conference paper

Xiu D, Sherwin SJ, Dong S, Karniadakis GEet al., 2005, Strong and auxiliary forms of the semi-Lagrangian method for incompressible flows, Journal of Scientific Computing, Vol: 25, Pages: 323-346, ISSN: 0885-7474

Journal article

Sherwin SJ, Blackburn HM, 2005, Three-dimensional instabilities and transition of steady and pulsatile axisymmetric stenotic flows, JOURNAL OF FLUID MECHANICS, Vol: 533, Pages: 297-327, ISSN: 0022-1120

Journal article

Pitt RE, Sherwin SJ, Theofilis V, 2005, BiGlobal stability analysis of steady flow in constricted channel geometries, 8th ICFD Conference on Numerical Methods for Fluid Dynamics, Publisher: JOHN WILEY & SONS LTD, Pages: 1229-1235, ISSN: 0271-2091

Conference paper

Miliou A, Mortazavi I, Sherwin S, 2005, Cut-off analysis of coherent vortical structure identification in a three-dimensional external flow, COMPTES RENDUS MECANIQUE, Vol: 333, Pages: 211-217, ISSN: 1631-0721

Journal article

Giordana S, Sherwin SJ, Peiro J, Doorly DJ, Papaharilaou Y, Caro CG, Watkins N, Cheshire N, Jackson M, Bicknall C, Zervas Vet al., 2005, Automated classification of peripheral distal by-pass geometries reconstructed from medical data, JOURNAL OF BIOMECHANICS, Vol: 38, Pages: 47-62, ISSN: 0021-9290

Journal article

Eskilsson C, Sherwin SJ, 2005, Discontinuous galerkin spectral/hp element modelling of dispersive shallow water systems, JOURNAL OF SCIENTIFIC COMPUTING, Vol: 22-3, Pages: 269-288, ISSN: 0885-7474

Journal article

Sherwin SJ, Peiro J, 2005, Finite difference, finite element and finite volume methods for partial differential equations, Handbook of materials modeling, Editors: Yip, Yip, Berlin, Publisher: Springer, Pages: 1-30, ISBN: 9781402032875

Book chapter

Karniadakis G, Sherwin S, 2005, Spectral/hp element methods for computational fluid dynamics, Oxford, Publisher: Oxford University Press, ISBN: 9780198528692

Book

Alastruey J, Parker KH, Peiro J, Sherwin SJet al., 2005, A one-dimensional simulation of the human conduit arteries compared to experimental data, ASME Summer Biongineering Conference, abstract 0328683, Vail, CO, USA

Conference paper

Abdessemed N, Sherwin SJ, Theofilis V, 2004, On unstable 2d basic states in low pressure turbine flows at moderate reynolds numbers

Results are presented of BiGlobal stability analysis of incompressible flow over a row of T-106/300 Low Pressure Turbine blades. In particular the two- and three-dimensional stability of a two-dimensional steady state is investigated for Reynolds numbers below 915. Both structured and unstructured meshes have been used at different degrees of refinement, while variations of the polynomial order of the numerical methods in either approach have ensured numerical convergence. The analysis shows that the transition from steady to periodic flow takes place at a Reynolds number of Rec = 905 ± 10. The flow remains linearly stable to three-dimensional disturbances below Rec. The leading eigenvalues of three-dimensional BiGlobal eigenmodes of the LPT flow have been obtained in a range of Reynolds and spanwise wavenumber parameters. The two most interesting eigenmodes have been found to be related with the wake of the blade and the separated flow in the trailing-edge region on the suction side of the blade. © 2004 by the American Institute of Aeronautics and Astronautics, Inc.

Conference paper

Blackburn HM, Sherwin SJ, 2004, Formulation of a Galerkin spectral element-Fourier method for three-dimensional incompressible flows in cylindrical geometries, JOURNAL OF COMPUTATIONAL PHYSICS, Vol: 197, Pages: 759-778, ISSN: 0021-9991

Journal article

Eskilsson C, Sherwin SJ, 2004, A triangular spectral/hp discontinuous Galerkin method for modelling 2D shallow water equations, INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, Vol: 45, Pages: 605-623, ISSN: 0271-2091

Journal article

Robertson I, Sherwin SJ, Graham JMR, 2004, Comparison of wall boundary conditions for numerical viscous free surface flow simulation, JOURNAL OF FLUIDS AND STRUCTURES, Vol: 19, Pages: 525-542, ISSN: 0889-9746

Journal article

varghese S, Frankel S, Pitt R, Sherwin SJet al., 2004, Numerical simulation of pulsatile flow through stenotic vessels, Turbulence and shear flow phenomena, Sendai, Japan, 25 - 27 June 2003

Conference paper

Giordana S, Radaelli A, Peiro J, Sherwin SJ, Doorly DJet al., 2004, Geometry reconstruction and CFD modeling of arterial flows, Proceedings ICFD conference on numerical methods for fluid dynamics, Oxford, England, 29 March - 1 April 2004

Conference paper

McKeon BJ, Lambert S, Sherwin SJ, Morrison JFet al., 2004, Active dimples for flow control, Barcelona, Advances in turbulence X, Publisher: CIMNE, Pages: 581-584

Conference paper

McKeon BJ, Lambert S, Sherwin SJ, Morrison JFet al., 2004, Active flow control by vorticity flux from a dimpled surface, Poitiers, First European Forum on Flow Control, Publisher: Univ. Poitiers, Pages: 37-39

Conference paper

Alastruey J, Parker KH, Peiro J, Sherwin SJet al., 2004, Wave analysis of flow in the palmar arch, Journal of Physiology 561P PC18, Publisher: J. Physiol

Conference paper

Robertson I, Sherwin SJ, Bearman PW, 2003, Flutter instability prediction techniques for bridge deck sections, INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, Vol: 43, Pages: 1239-1256, ISSN: 0271-2091

Journal article

Sherwin SJ, Franke V, Peiro J, Parker Ket al., 2003, One-dimensional modelling of a vascular network in space-time variables, JOURNAL OF ENGINEERING MATHEMATICS, Vol: 47, Pages: 217-250, ISSN: 0022-0833

Journal article

Sherwin SJ, Formaggia L, Peiro J, Franke Vet al., 2003, Computational modelling of 1D blood flow with variable mechanical properties and its application to the simulation of wave propagation in the human arterial system, INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, Vol: 43, Pages: 673-700, ISSN: 0271-2091

Journal article

Zienkiewicz OC, Taylor RL, Sherwin SJ, Peiro Jet al., 2003, On discontinuous Galerkin methods, INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, Vol: 58, Pages: 1119-1148, ISSN: 0029-5981

Journal article

Jackson MJ, Bicknell CD, Zervas V, Cheshire NJW, Sherwin SJ, Giordana S, Peiro J, Papaharilaou Y, Doorly DJ, Caro CGet al., 2003, Three-dimensional reconstruction of autologous vein bypass graft distal anastomoses imaged with magnetic resonance: Clinical and research applications, JOURNAL OF VASCULAR SURGERY, Vol: 38, Pages: 621-625, ISSN: 0741-5214

Journal article

Miliou A, Sherwin SJ, Graham JMR, 2003, Fluid dynamic loading on curved riser pipes, JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING-TRANSACTIONS OF THE ASME, Vol: 125, Pages: 176-182, ISSN: 0892-7219

Journal article

Eskilsson C, Sherwin SJ, 2003, An hp/spectral element model for efficient long-time integration of Boussinesq-type equations, COASTAL ENGINEERING JOURNAL, Vol: 45, Pages: 295-320, ISSN: 0578-5634

Journal article

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://wlsprd.imperial.ac.uk:80/respub/WEB-INF/jsp/search-html.jsp Request URI: /respub/WEB-INF/jsp/search-html.jsp Query String: id=00156735&limit=30&person=true&page=8&respub-action=search.html