Publications

Journals

2016

Thomas, C., Mughal, M., Gipon, M., Ashworth, R. and Cava, A, M., 2016 Boundary layerand stability methods for crossflow over wavy surfaces. AIAA Journal, [Accepted for publication].

Wu, X., and Dong, M., A local scattering theory for the effects of isolated roughness on boundary-layer instability and transition: transmission coefficient as an eigenvalue, Journal of Fluid Mechanics, to appear 2016

Dempsey, L., Deguchi, K., Hall, P., Walton A., Localized vortex/Tollmien-Schlichting wave interaction states in plane Poiseuille flow, Journal of Fluid Mechanics, to appear 2016

Xu, H., Sherwin, S.,  Hall, P., Wu, X., The behaviour of Tollmien-Schlichting waves undergoing small-scale localised distortions, Journal of Fluid Mechanics, to appear 2016

Ruban, A., Bernots, T., Kravtsova, M., (2016) Linear and nonlinear receptivity of the boundary layer in transonic flows, Journal of Fluid Mechanics, 786, pp 154- 189 doi:10.1017/jfm.2015.587

Wu, X., Zhuang, X., Nonlinear dynamics of large-scale coherent structures in turbulent free shear layers, Journal of Fluid Mechanics, 787, pp 396- 439 doi.org/10.1017/jfm.2015.646

2015

Deguchi, K., and Hall, P., (2015) Asymptotic descriptions of oblique coherent structures in shear flows, Journal of Fluid Mechanics, 782 pp 356- 367 doi:10.1017/jfm.2015.542

Mengaldo, G., De Grazia, D., Moxey, D., Vincent, P., and Sherwin, S.  (2015) Dealiasing techniques for high-order spectral element methods on regular and irregular grids, Journal of Computational Physics,  299, pp 56–81 doi:10.1016/j.jcp.2015.06.032

Mengaldo, G., Kravtsova M., Ruban A. and Sherwin, S., (2015). Triple-deck and direct numerical simulation analyses of high-speed subsonic flows past a roughness element, Journal of Fluid Mechanics, 774, pp 311-323 doi:10.1017/jfm.2015.281

Mengaldo, G., de Grazia, D., Vincent, P., Sherwin, S., (2015). On the connections between discontinuous Galerkin and Flux Reconstruction Schemes: Extension to Curvilinear Meshes, Journal of Scientific Computing, ISSN: 0885-7474

De Tullio, N. and Ruban, A., (2015) A numerical evaluation of the asymptotic theory of receptivity for subsonic compressible boundary layers. Journal of Fluid Mechanics, 771, pp 520-546 doi:10.1017/jfm.2015.196

De Tullio, N., and Sandham, D., (2015). Influence of boundary-layer disturbances on the instability of a roughness wake in a high-speed boundary layer, Journal of Fluid Mechanics, 763, pp 136-165 doi:10.1017/jfm.2014.663

Deguchi, K. and Hall, P. (2015) Free-stream coherent structures in growing boundary layers: a link to near-wall streaks, Journal of Fluid Mechanics, 778, pp 451-484 doi:10.1017/jfm.2015.314

Thomas, C., Hall, P., Davies, C., (2015) Nonlinear effects on the receptivity of cross-flow in the swept Hiemenz flow, Journal Of Fluid Mechanics, 763, pp. 433-459 doi:10.1017/jfm.2014.688

Wu, X., Huang, Z., (2015), A non-perturbative approach to spatial instability of weakly non-parallel shear flows, Physics of Fluids, 27, 054102 doi:10.1063/1.4919957

Moxey, D., Ekelschot, D., Keskin, U., Sherwin, S.,  Peiró, J (2015), High-order curvilinear meshing using a thermo-elastic analogy, CAD Computer Aided Design, ISSN: 0010-4485

Gowree, E., Atkin, C., Grupett, S., (2015) A simple digital-optical system to improve accuracy of hot-wire measurements Measurement Science and Technology, 26, 095303 DOI:10.1088/0957-0233/26/9/095303

Cantwell, C., Moxey, D. Comerford, A., Bolis, A., Rocco, G., Mengaldo, G., de Grazia, D., Yakovlev. S., Lombard, J-E., Ekelschot, D., Jordi, B., Xu, H., Mohamied, Y., Eskilsson, C., Nelson, B., Vos, P., Biotto, C., Kirby, R., Sherwin, S. (2015) Nektar++: An open-source spectral/hp element framework, Computer Physics Communications, 192, pp 205-219 doi:10.1016/j.cpc.2015.02.008

Jones, B., Heins, P., Kerrigan, E., Morrison. J., and Sharma, S.,  (2015) Modelling for robust feedback control of fluid flows, Journal of Fluid Mechanics, 769, pp 687-722 doi:10.1017/jfm.2015.84

2014

Deguchi, K. and Hall, P.  (2014) Free-stream coherent structures in parallel boundary-layer flows. Journal of Fluid Mechanics, 752, pp 602-625 doi:10.1017/jfm.2014.282

De Grazia D., Mengaldo G., Moxey D., Vincent, E., and Sherwin, S., (2014) Connections between the discontinuous Galerkin method and high-order flux reconstruction schemes, International Journal for Numerical Methods in Fluids, 75, po 840–859, DOI: 10.1002/fld.3915

Wu, X., (2014). On the role of acoustic feedback in boundary-layer instability, Philosophical Transactions of the Royal Society A, 372, 20130347, DOI: 10.1098/rsta.2013.0347

Deguchi, K. and Hall, P. (2014) Canonical exact coherent structures embedded in high Reynolds number flows,  Philosophical Transactions of the Royal Society A,  372, 20130352; DOI: 10.1098/rsta.2013.0352.

Deguchi, K. and Hall, P. (2014) The high-Reynolds-number asymptotic development of nonlinear equilibrium states in plane Couette flow , Journal of Fluid Mechanics, 750, pp 99-112 doi:10.1017/jfm.2014.234

K. Deguchi, P. Hall, (2014) Free-stream coherent structures in parallel boundary-layer flows. Journal of Fluid Mechanics, 752, pp 602-625 doi:10.1017/jfm.2014.282

2013

Mughal, M. & Ashworth, R. (2013) Uncertainty Quantification Based Receptivity Modelling of Crossflow Instabilities Induced by Distributed Surface Roughness in Swept Wing Boundary Layers.  AIAA 2013-3106.

Deguchi K., and Walton, A., (2013) Axisymmetric travelling waves in annular sliding Couette flow at finite and asymptotically large Reynolds number, Journal of Fluid Mechanics, 720, pp 582-617 doi:10.1017/jfm.2013.51

Deguchi, K. and Hall, P., Walton, A., (2013) The emergence of localized vortex–wave interaction states in plane Couette flow, Journal of Fluid Mechanics, 721, pp 58-85 doi:10.1017/jfm.2013.27

Hall, P. (2013) On the breakdown of Rayleigh’s criterion for curved shear flows: a destabilization mechanism for a class of inviscidly stable flows , Journal of Fluid Mechanics, 734, pp 36-82 doi:10.1017/jfm.2013.446

Ruban, A. and Kravtsova, M. (2013) Generation of steady longitudinal vortices in hypersonic boundary layer, Journal of Fluid Mechanics, 729, pp 702-731 doi:10.1017/jfm.2013.336

Ruban, A., Bernots, T. and Pryce, D. (2013) Receptivity of the boundary layer to vibrations of the wing surface, Journal of Fluid Mechanics, 723, pp 480-528 doi:10.1017/jfm.2013.119

Blackburn, H., Hall, P., Sherwin, S., (2013) Lower branch equilibria in Couette flow: the emergence of canonical states for arbitrary shear flows, Journal of Fluid Mechanics, 726, R2 doi:10.1017/jfm.2013.254

DeGrazia, D.,  Mengaldo, G.,  Moxey, D., Vincent, P.,  Sherwin, S. (2013) Connection between the discontinuous Galerkin method and high-order flux reconstruction, International  Journal Numerical Methods in Fluids, 00:1–18, DOI: 10.1002/fld

Conferences

2016

T. Saeed, M. Mughal; J. Morrison, The Interaction of a Swept-Wing Boundary Layer with Surface Excrescences,  Scitech 54th AIAA Aerospace Sciences meeting, San Diego, 4 - 8 January 2016  

2015

H. Xu, S.  Mughal, S. Sherwin, Effect of Indentation on Boundary Layer Instability,  68th Annual Meeting of the APS Division of Fluid Dynamics, Boston, 22 - 24 November 2015.

R. Bosworth, J. Morrison, Flat-plate boundary-layer receptivity to high amplitude, spanwise-oriented, vortical disturbances in the free-stream, 68th Annual Meeting of the APS Division of Fluid Dynamics, Boston, 22 - 24 November 2015.

C. Thomas, S. Mughal & R. Ashworth. The Effect of Surface Waviness on the Growth and Development of TS Waves.  68th Annual Meeting of the APS Division of Fluid Dynamics, Boston, 22-24 November 2015

T. Saeed, Mughal, J. Morrison ,Effect of Surface Excrescences on Swept-Wing Crossflow,  DiPaRT Annual Meeting November 16-18, 2015.

C. Thomas, S. Mughal, H. Roland, A. Martinez Cava, R. Ashworth, Aerodynamic Methods to Support Laminar Wing Design for Manufacture: Progress at AGI and Imperial College , DiPaRT Annual Meeting November 16-18, 2015

Hui Xu & Spencer J. Sherwin. On a mechanism of laminar-turbulent transition delay. 15th European Turbulence Conference 2015, Delft, The Netherlands, 25-28 August 2015

Hui Xu & Spencer J. Sherwin. On a mechanism of laminar-turbulent transition delay. Sixth International Symposium on Bifurcations and Instabilities in Fluid Dynamics (BIFD), ESPCI, Paris, France, 15-17 July 2015

R. Cimpeanu. Cloud on the Horizon: High Speed Droplet Impact, Spreading and Thin Film Dynamics. 8th GRACM International Congress on Computational Mechanics, Volos, Greece, 12-15 July 2015

M. A. Kravtsova and A.I. Ruban.  Generation of Steady Longitudinal Vortices in Hypersonic Boundary layer. 11th ERCOFTAC SIG 33 Workshop, Progress in Transition Modelling and Control, St Helier, Jersey, UK, 15-17 April 2015

C. Thomas, M. Gipon, S. Mughal & R. Ashworth. Boundary Layer and Stability Methods for Surface Deformations.  11th ERCOFTAC SIG 33 Workshop, Progress in Transition Modelling and Control, St Helier, Jersey, 15-17 April 2015

C. Thomas, M. Gipon, S. Mughal & R. Ashworth. Boundary Layer and Stability Methods for Surface Deformations.  British Applied Mathematics Colloquium, Cambridge, 30 March-2 April 2015

2014

Shahid Mughal & Richard Ashworth. Progress in the Modelling of Surface Roughness and its Influence on Crossflow Transition. AIRBUS flight Physics, DiPaRT Annual Meeting, 24-26 Nov 2014

Bosworth, Morrisson. Flat-plate receptivity to convected disturbances at localised roughness – TS wave generation, 67th Annual Meeting of the APS Division of Fluid Dynamics, San Francisco, California, 23-25 November 2014

Hui Xu, Philip Hall, Spencer Sherwin, Effect of curvature modulation on Gortler vortices in boundary layers, 67th Annual Meeting of the APS Division of Fluid Dynamics, San Francisco, California, 23-25 November 2014

J Maestri. Subcritical transition in channel flows, 67th Annual Meeting of the APS Division of Fluid Dynamics, San Francisco, California, 23-25 November 2014

Vemuri, Morrison, Kerrigan. Tollmien-Schlichting Wave Cancellation by Feedback Control, 67th Annual Meeting of the APS Division of Fluid Dynamics, San Francisco, California, 23-25 November 2014

Qadri, U. & Schmid, P.. Global stability and frequency response of flow over shallow cavities, 67th Annual Meeting of the APS Division of Fluid Dynamics, San Francisco, California, 23-25 November 2014

Wu, X. & Dong, M. A local scattering theory for the effects of isolated roughness on boundary-layer instability and transition: transmission coefficient as an eigenvalue. European Fluid Dynamics Conference 2014, Copenhagen, Denmark, 14-17 September 2014

N. De Tullio, A.I. Ruban Assessment of the asymptotic theory of receptivity using numerical simulations of the Navier-Stokes equations. In 10th European Fluid Mechanics Conference, Copenhagen, Denmark, 14-18 September 2014

A. Butler and X. Wu. Non-Parallel-Flow Effects Of Stationary Crossflow Vortices At Their Genesis. IUTAM-ABCM Symposium on Laminar-Turbulent Transition, Rio de Janeiro, Brazil, 8-12 September 2014

Richard Ashworth, Shahid Mughal. Modeling three dimensional effects on cross flow instability from leading edge dimples. IUTAM_ABCM Symposium on Laminar Turbulent Transition. 8-12 September 2014

Shahid Mughal. Quantification of Variance due to Distrbuted Surface Roughness in Receptivity Modelling and Boundary-Layer Transition, IUTAM_ABCM Symposium on Laminar Turbulent Transition. 8-12 September 2014

Hui Xu, Sherwin Spencer. Transmission coefficient of Tollmien-Schlichting waves undergoing small indentation/hump Distortion, 29th Congress of the International Council of the Aeronautical Sciences, St. Petersburg, Russia, 7-12 September 2014

C. Thomas, P. Hall, Davies, C. The effects of nonlinearity on crossflow receptivity. Congress of the International Council of the Aeronautical Sciences (ICAS), St. Petersburg, 7–12 September 2014

Saeed, Mughal and Morrison. Roughness effects on swept-wing crossflow transition in moderate free-stream turbulence. 29th Congress of the International Council of the Aeronautical Sciences (ICAS), St. Petersburg, 7–12 September 2014

C. Thomas. Nonlinear disturbance development and receptivity of crossflow. The First Madingley Workshop. Fluid Mechanics: an interdisciplinary approach. Experimental, analytics, numerical analysis and high performance computing. Madingley Hall, Cambridge, 23-25 July 2014

G. Mengaldo, D. De Grazia, F. Witherden, A. Farrington, P. Vincent, S. Sherwin. Boundary Conditions for Compact High-Order methods on Unstructured Grids: A Practical Guide. 7th AIAA Theoretical Fluid Mechanics Conference Atlanta, June 2014

A. Butler. Viscous and non-parallel-flow effects on stationary cross-flow vortices. British Applied Mathematics Colloquium 2014, Cardiff University, 28-30 April 2014

X. Wu. A local scattering theory for the effect of isolated roughness on boundary layer instability and transition. British Applied Mathematics Colloquium 2014, Cardiff University, 28-30 April 2014

L. Dempsey. Vortex-wave interaction in Poiseuille-Couette flow. British Applied Mathematics Colloquium 2014, Cardiff University, 28-30 April 2014

D. Moxey. Applications of the spectral/hp element method in CFD. British Applied Mathematics Colloquium 2014, Cardiff University, 28-30 April 2014

R. Cimpeanu. The effect of thin liquid films on boundary layer separation. British Applied Mathematics Colloquium 2014, Cardiff University, 28-30 April 2014

M. Gipon. Transition to turbulence in cylindrical geometry. British Applied Mathematics Colloquium 2014, Cardiff University, 28-30 April 2014

J. Maestri. Subcritical transition in channel flows. British Applied Mathematics Colloquium 2014, Cardiff University, 28-30 April 2014

2013

K DEGUCHI, P HALL. The High Reynolds Number Limit of Nonlinear Equilibrium States in Couette Flow. 66th Annual Meeting of the APS Division of Fluid Dynamics, 24 – 26 Nov 2013

P HALL, K DEGUCHI. Nonlinear Equilibrium States in Growing Boundary Layers . 66th Annual Meeting of the APS Division of Fluid Dynamics, 24 – 26 Nov 2013

T. SAEED, J. MORRISON. Experimental Investigation on the Effects of Free-Stream Turbulence on Swept-Wing Transition. 66th Annual Meeting of the APS Division of Fluid Dynamics, 24 – 26 Nov 2013

Hui Xu, Spencer Sherwin, Xuesong Wu. Transmission coefficient of Tollmien-Schlichting waves undergoing small indentation/hump distortion. 66th Annual Meeting of the APS Division of Fluid Dynamics, 24 – 26 Nov 2013

A.I. Ruban, M.A. Kravtsova & T. Bernots. Linear and nonlinear receptivity of the boundary layer in transonic flows. 66th Annual Meeting of the APS Division of Fluid Dynamics, 24 – 26 Nov 2013

Shahid Mughal, Richard Ashworth & Christian Thomas. Surface Waviness Effects and Boundary-Layer Instability Modelling on Swept Wings with a PSE3D Surface Marching Procedure. Airbus-DiPaRT ‘Flight Physics of the Future Wing’ Annual Meeting, 25-27 Nov 2013

A. H. White, P. Hall, and M. S. Mughal. Numerical and asymptotic analysis of Gortler vortices generated by surface roughness. 11th International Conference of Numerical Analysis and Applied Mathematics 2013 (ICNAAM 2013), Rodos Palace Hotel, Rhodes, Greece, 21-27 September 2013

X. Wu. The role of acoustic feedback in boundary-layer instability. 11th International Conference of Numerical Analysis and Applied Mathematics 2013 (ICNAAM 2013), Rodos Palace Hotel, Rhodes, Greece, 21-27 September 2013

S.M. Mughal & R. Ashworth. Uncertainty Quantification Based Receptivity Modelling of Crossflow Instabilities Induced by Distributed Surface Roughness in Swept Wing Boundary Layers. 43rd AIAA Fluid Dynamics Conference, San Diego, CA, 24-27 June 2013 DOI: 10.2514/6.2013-3106

Thomas de Cointet. Receptivity to crossflow vortices. British Applied Mathematics Colloquium 2013, University of Leeds, 9-12 April 2013

Curtis Banks. Receptivity of crossflow vortices and the effects of surface curvature. British Applied Mathematics Colloquium 2013, University of Leeds, 9-12 April 2013

David Pryce. Receptivity of the Boundary Layer to Elastic Vibrations of the Wing Surface. British Applied Mathematics Colloquium 2013, University of Leeds, 9-12 April 2013

Tomass Bernots. Receptivity of the boundary layer to vibrations of the wing surface with emphasis on compressibility effect. British Applied Mathematics Colloquium 2013, University of Leeds, 9-12 April 2013

Jamie Nutter. Impact of abrupt changes on boundary-layer transition: rigid-porous and porous-rigid wall junctions. British Applied Mathematics Colloquium 2013, University of Leeds, 9-12 April 2013

Xuesong Wu. On continuous spectra of the Orr-Sommerfeld/Squire equations and entrainment of free-stream vortical disturbances. British Applied Mathematics Colloquium 2013, University of Leeds, 9-12 April 2013

Liam Dempsey. Vortex-wave interaction in plane Poiseuille-Couette flow. British Applied Mathematics Colloquium 2013, University of Leeds, 9-12 April 2013

Atkin, C., & Gowree, E. R. On the experimental measurement of a turbulent incompressible attachment line. In 48th International Symposium of Applied Aerodynamics. AAAF, St-Louis, France, 25 March 2013

2012

A. ISONI, H. BLACKBURN, P. HALL, S. SHERWIN. Methodologies for solving Vortex Wave Interaction problems to obtain edge states , 65th Annual Meeting of the APS Division of Fluid Dynamics, San Diego, California, 18-20 November 2012

M. NAGATA, K. DEGUCHI. New exact coherent states in plane Poiseuille flow. 65th Annual Meeting of the APS Division of Fluid Dynamics, San Diego, California, 18-20 November 2012

Atkin, C., & Gowree, E. R. Recent developments to the viscous Garabedian and Korn method. 28th International congress of the Aeronautical Sciences. Brisbane, Australia: ICAS, 24 September 2012

Philip Hall. Vortex-wave interaction theory and self-sustained processes in shear flows (FM07-012). 23rd International Congress of Theoretical and Applied Mechanics (ICTAM2012), Beijing, 19 to 24 August 2012

Anatoly I. Ruban, David Pryce. Receptivity of the boundary layer on a wing surface to elastic vibrations of the wing surface (FM02-026). 23rd International Congress of Theoretical and Applied Mechanics (ICTAM2012), Beijing, 19 to 24 August 2012

T. Bernots. Receptivity of Acoustic waves in Transonic flow. European Postgraduate Fluid Dynamics Conference 2012, Imperial College London, 10–12 July 2012

J. Maestri. Self-Sustaining Processes in Shear Flows. European Postgraduate Fluid Dynamics Conference 2012, Imperial College London, 10–12 July 2012

A.I. Ruban. Generation of T-S waves by vibrations of the wing surface. GLOBAL FLOW INSTABILITY AND CONTROL V, Creta Maris Resort, Hersonissos, Crete, Greece, 19-22 September 2012

P. Hall. Vortex-wave interactions in shear flows: spatial localization and the birth of spots. GLOBAL FLOW INSTABILITY AND CONTROL V, Creta Maris Resort, Hersonissos, Crete, Greece, 19-22 September 2012

X. Wu. Instability of Streaks and Its Dependence on the Characteristics of Free-stream Disturbances. GLOBAL FLOW INSTABILITY AND CONTROL V, September 19-22, 2012 Creta Maris Resort, Hersonissos, Crete, Greece, 19-22 September 2012

Alex White and P Hall. The effect of roughness on the stability of three-dimensional boundary layers. British Applied Mathematics Colloquium 2012, University College London, 27-29 March 2012

Jamie Nutter and Xuesong Wu. Impact of Junction between Rigid and Porous wall on Boundary-Layer Instability. British Applied Mathematics Colloquium 2012, University College London, 27-29 March 2012

Joseph Maestri. Self-Sustaining Processes in Shear Flows. British Applied Mathematics Colloquium 2012, University College London, 27-29 March 2012

David Pryce. Receptivity of the Boundary Layer to Elastic Vibrations of the Wing Surface. British Applied Mathematics Colloquium 2012, University College London, 27-29 March 2012

Christian Thomas, Philip Hall and Shahid Mughal. Receptivity to wall imperfections over a swept wing. British Applied Mathematics Colloquium 2012, University College London, 27-29 March 2012

Thomas de Cointet. Transonic Flow Separation caused by a Discontinuity in Surface Curvature. British Applied Mathematics Colloquium 2012, University College London, 27-29 March 2012

Curtis Banks. Receptivity of Cross-flow vortices. British Applied Mathematics Colloquium 2012, University College London, 27-29 March 2012

Atkin, C., & Gowree, E. R. Experimental investigation of the behaviour of the flow in the vicinity of an incompressible turbulent attachment line. In 47th International Symposium of Applied Aerodynamics. AAAF, Paris, France, 26 March 2012

2011

P. HALL. Vortex-wave interactions/self-sustained processes in shear layers. 64th Annual Meeting of the APS Division of Fluid Dynamics, Baltimore, Maryland, USA, 20–22 November 2011