- Room No :
**637, Huxley Building** - Telephone No. :
**+44 207 594 8494** - E-Mail Address :
**x.wu@ic.ac.uk** - General Research interests: Fluid mechanics; Applied mathematics.
- Particular Research Interests:
- On generation of sound in wall-bounded shear flows: source identification, mean-flow refraction, back action of sound and global acoustic coupling.
*J. Fluid Mech.*, (in press) (2011). - Excitation of steady and unsteady Gortler vortices by free-stream vortical disturbances.
*J. Fluid Mech.*,**682**, 66-100. (2011, with D. Zhao and J. Luo). - Evolution and instability of nonlinear unsteady streaks generated by free-stream vortical disturbances.
*J. Fluid Mech.*,**677**, 1-38. (2011, with P. Ricco and J. Luo). - Large-activation-energy theory for premixed combustion under the influence of enthalpy fluctuations.
*J. Fluid Mech.*,**655**, 3-23. (2010, with P. Moin). - On linear instability of a finite Stokes layer: instantaneous
versus Floquet modes.
*Phys. Fluids*,**22**, 054106, dio:10.1063/1.3422004. (2010, with J. Luo). - Low-frequency sound radiated by a nonlinearly modulated wavepacket of helical modes on a subsonic circular jet.
*J. Fluid Mech.*,**637**, 173-211. (2009, with P. Huerre). - Flame-acoustic resonance initiated by vortical disturbances.
*J. Fluid Mech.*,**634**, 321-357. (2009, with C. K. Law). - Nonlinear development of subsonic modes on compressible mixing layers: a unified strongly nonlinear critical-layer theory.
*J. Fluid Mech.*,**614**, 105-144. (2008, with C. A. Sparks). - Instability of a stratified boundary layer and its coupling with internal gravity waves.
Part I: Linear and nonlinear instabilities.
*J. Fluid Mech.*,**595**, 379-408. (2008, with J. Zhang). - Instability of a stratified boundary layer and its coupling with internal gravity waves.
Part II: Coupling with internal gravity waves via topography.
*J. Fluid Mech.*,**595**, 409-433. (2008, with J. Zhang). - On the catalytic role of the phase-locked interaction of Tollmien--Schlichting
waves in boundary-layer transition.
*J. Fluid Mech.***590**, 265-294. (2007, with P. A. Stewart and S. J. Cowley). - Response of a compressible laminar boundary layer to free-stream vortical disturbances.
*J. Fluid Mech.***587**, 97-138. (2007, with P. Ricco). - Viscous-inviscid interaction in transonic Prandtl-Meyer flow.
*J. Fluid Mech.***568**, 387-424. (2006, with A. Ruban and R. Perera). - Acoustic radiation of Tollmien-Schlichting waves as they undergo
rapid distortion.
*J. Fluid Mech.***550**, 307-347. (2006 with L. Hogg). - Influence of small imperfections on the stability of plane
Poiseuille flow and limitation of Squire's theorem.
*Phys. Fluids***18**(044104). (2005 with J. S. Luo). - Asymptotic approach to combustion instability.
*Phil. Trans. Roy. Soc. Lond.***363**, 1247-1259 (2005). - Mach wave radiation of nonlinearly evolving supersonic instability
modes in shear flows.
*J. Fluid Mech.***523**, 121-159. (2005). - Non-equilibrium, nonlinear critical layers in laminar-turbulent
transition.
*Acta Mechanica Sinica***20**, 327-339 (2004). - Influence of small imperfections on the stability of plane Poiseuille
flow: A theoretical model and direct numerical simulation.
*Phys. Fluids***16**(8), 2852-2863. (2004, with J.S. Luo). - Combustion instability due to the nonlinear interaction between
sound and flame.
*J. Fluid Mech.***497**, 23-53. (2003, with M. Wang, P. Moin and N. Peters). - Linear and nonlinear instability of a Blasius
boundary layer perturbed by streamwise vortices. Part II: Intermittent
instability induced by long-wavelength Klebanoff modes.
*J. Fluid Mech.***483**, 249-283. (2003, with M. Choudhari). - Linear and nonlinear instability of a Blasius
boundary layer perturbed by streamwise vortices. Part I: Steady streaks.
*J. Fluid Mech.***483**, 225-248. (2003, with J.S. Luo). - Stability of flow in a channel with vibrating walls.
*Phys. Fluids***14**, 3927-2936. (2002, with J.M. Floryan and J. Szumbarski). - Generation of sound and instability waves due to unsteady suction and
injection.
*J. Fluid Mech.***453**, 289-313 (2002). - On local boundary-layer receptivity to vortical disturbances in the
free stream.
*J. Fluid Mech.***449**, 373-393 (2001). - Receptivity of boundary layers with distributed roughness to acoustic
and vortical disturbances: a second-order asymptotic theory and comparison
with experiments.
*J. Fluid Mech.***431**, 91-133 (2001). - Generation of Tollmien-Schlichting waves by convecting gusts
interacting with sound.
*J. Fluid Mech.***397**, 285-316 (1999). - On the nonlinear evolution of a pair of oblique Tollmien-Schlichting
waves in boundary layers.
*J. Fluid Mech.***340**, 361-394. (1997, with S.J. Leib and M.E. Goldstein). - On oblique-mode breakdown in boundary layers.
*AIAA Paper*, 96-2133 (1996). - On the weakly nonlinear development of Tollmien-Schlichting wavetrains
in boundary layers.
*J. Fluid Mech.***323**, 133-171. (1996, with P.A. Stewart and S.J. Cowley). - On an active resonant triad of mixed modes in symmetric shear flows:
a plane wake as a paradigm.
*J. Fluid Mech.***317**, 337-368. (1996). - Interaction of phase-locked modes: a new
mechanism for the rapid growth of three-dimensional disturbances.
*J. Fluid Mech.***316**, 335-372. (1996, with P.A. Stewart). A slimed-down version is published in*Proc. of IUTAM Symposium on Laminar-Turbulent Transition, Sendai*, (ed. R. Kobayashi), pp. 45-52. Springer. (1995). - The resonant-triad interaction in boundary-layer transition.
In
*Proc. of IUTAM Symposium on Laminar-Turbulent Transition, Sendai*, (ed. R. Kobayashi), pp. 365-372. Springer. (1995, with M.J. Jennings and P.A. Stewart). - Stability of cellular states of the
Kuramoto-Sivashinsky equation.
*SIAM J. Appl. Maths.***56**, 1621-1638. (1996, with J.N. Elgin). - Viscous effects on fully coupled resonant-triad interactions: an
analytical approach.
*J. Fluid Mech.***292**, 377-407. (1995). - On the nonlinear evolution of instability modes in unsteady shear
layers: the Stokes layer as a paradigm.
*Q. J. Mech. Appl. Math.*,**48**, 159-188. (1995, with S.J. Cowley). - Asymptotic approaches to transition modelling. In
*Progress in Transition Modelling: AGARD Report 793*, 1-38. (1994, with S.J. Cowley). - Nonlinear temporal-spatial modulation of near-planar Rayleigh
waves in shear flows: formation of streamwise vortices.
*J. Fluid Mech.***256**, 685-719. (1993). - On critical-layer and diffusion-layer nonlinearity in the
three dimensional stage of boundary-layer transition.
*Proc. Roy. Soc. Lon.***A443**, 95-106. (1993). - On the weakly nonlinear instability of shear flows to pairs of oblique
waves: the Stokes layer as a paradigm.
*J. Fluid Mech.***253**, 681-720. (1993, with S.S. Lee and S.J. Cowley). - A critical-layer analysis of resonant triad in Blasius boundary layer
transition: nonlinear interactions.
*J. Fluid Mech.***256**, 85-106. (1993, with R.R. Mankbadi and S.S. Lee). - The nonlinear evolution of high-frequency resonant triad waves in an
oscillatory Stokes-layer at high Reynolds number.
*J. Fluid Mech.***245**, 553-797. (1992).

- Boundary layer theory;
Hydrodynamic instability & Laminar-turbulent transition; Nonlinear waves;

- Aeroacoustics; Combustion instability.