Peixu Guo

Peixu Guo

To explore unknowns.

Research Group on Fluid Mechanics

About Me

Dr. Peixu Guo obtained BEng and PhD degrees from Beihang University in China, graduating with honors such as National Scholarship and Outstanding Graduates Award. He joined Department of Aeronautical and Aviation Engineering (AAE), The Hong Kong Polytechnic University as a Postdoctoral Fellow in 2022. He worked as a Research Assistant Professor (PI) in AAE starting from 2024. He joined School of Astronautics, Beihang University as an Associate Professor in 2026. His main research areas include stability and laminar-turbulent transition of high-speed flows.

Dr. Guo has been devoted to theoretical and computational studies on linear instability and nonlinear breakdown mechanisms of wall-bounded flows. He has also made contributions to the transition control, transition modelling and adjoint-based sensitivity analysis of hypersonic flows. Three of his recent representative contributions are: 1) to clarify the physical mechanism of transition reversal with an agreement between DNS and experiment, 2) to report a new breakdown scenario contributed by nonlinear interactions between first and second modes, and 3) to establish a unified theory for energy growth of boundary layer instabilities.

His publications include over 20 journal papers in J. Fluid Mech., J. Comput. Phys., Phys. Fluids, AIAA J., Chin. J. Aeronaut., etc., two of which are selected as homepage/featured articles. He also serves as project PI of several internal projects, co-PI collaborating with the Academy of Aerospace Propulsion Technology, co-I of GRF projects, supervisor/co-supervisor of several PhD students/postdoctoral fellows, session chair of several international conferences such as the International Symposia on Shock Waves, and Proceedings of the 10th World Congress on Momentum, Heat and Mass Transfer, and reviewer for J. Fluid Mech., etc. With regard to student supervision, several journal papers have been published on the top-tier journals including J. Fluid Mech., where the PhD student is the first author and Dr. Guo is the second and corresponding author. Dr. Guo is searching for academic collaboration with young scientists and students.

Research Interest

  1. Transition reversal on blunt bodies
  2. Direct numerical simulation on breakdown of hypersonic boundary layer
  3. Stability of shock wave/boundary layer interaction
  4. Unified theory of instability mechanisms for boundary layer
  5. Control of boundary layer instability by porous coatings
  6. Sensitivity and modeling of boundary layer stability and transition

Teaching

  1. Fundamentals of Aerodynamics (AAE3001), 2024/2025 second semester, for BEng (Hons) in Aviation Engineering.
  2. Introduction to Space Exploration (AAE1D02), 2024/2025 third semester, for BEng (Hons) in Aviation Engineering. (international summer school)
  3. Engineering Computations and Modelling (AAE5212), 2025/2026 first semester, for MSc in Aerospace Engineering.

Selected Publications

  1. Guo, P.* (2025) Transition reversal over a blunt plate at Mach 5. Part 2. The role of free-stream-disturbance form. Journal of Fluid Mechanics, 1025: A54.
  2. Guo, P., Hao, J., & Wen, C. Y. (2025) Transition reversal over a blunt plate at Mach 5. Journal of Fluid Mechanics, 1005: A5.
  3. Guo, P., Hao, J., & Wen, C. Y. (2023) Interaction and breakdown induced by multiple optimal disturbances in hypersonic boundary layer. Journal of Fluid Mechanics, 974: A50.
  4. Chen, Y., Guo, P.*, & Wen, C. Y. (2026) Role of acoustic metasurface in the nonlinear mode-mode interaction and breakdown of hypersonic boundary layer. Journal of Fluid Mechanics, 1026: A27.
  5. Chen, Y., Guo, P.*, & Wen, C. Y. (2023) A unified explanation of energy growth sources for unstable modes in flat-plate boundary layers. Journal of Fluid Mechanics, 972: A5.
  6. Xu, B., Sun, C., & Guo, P.* (2026) A Central differential flux with high-order dissipation for robust simulations of transcritical flows. Journal of Computational Physics, 550: 114653.
  7. Guo, P., Hao, J., & Wen, C. Y. (2025) Understanding the instability-wave selectivity of hypersonic compression ramp laminar flow. AIAA Journal, 63(7): 2580–2593.
  8. Guo, P., Shi, F., Gao, Z., Jiang, C., Lee, C. H., & Wen, C. Y. (2022) Heat transfer and behavior of the Reynolds stress in Mach 6 boundary layer transition induced by first-mode oblique waves. Physics of Fluids, 34(10): 104116. (Editor’s pick)
  9. Guo, P., Gao, Z., Jiang, C., & Lee, C. H. (2021) Sensitivity analysis on supersonic-boundary-layer stability subject to perturbation of flow parameters. Physics of Fluids, 33: 084111.
  10. Chen, Y., Ma, T., Guo, P.*, Hao, J. & Wen, C. Y. (2024) Optimal disturbances and growth patterns in hypersonic blunt-wedge flow, Chinese Journal of Aeronautics, 38(7): 103461. (Featured article)
  11. Huang, Q., Sun, C., & Guo, P.* (2026) Effect of angle of attack on the instability-wave selectivity in hypersonic compression ramp laminar flow. Physics of Fluids, 37(12): 124126.
  12. Guo, P., Gao, Z., Zhang, Z., Jiang, C., & Lee, C. H. (2019) Local-variable-based model for hypersonic boundary layer transition. AIAA Journal, 57(6): 2372–2383.
  13. Cao, S., Wang, Q., Guo, P., Li, J., & You, Y. (2026) On the transition zone in shock wave/boundary layer interactions. Journal of Fluid Mechanics, accepted.
  14. Hao, J., Cao, S., Guo, P., & Wen, C-Y. (2023) Response of hypersonic compression corner flow to upstream disturbances. Journal of Fluid Mechanics, 964: A25.
  15. Cao, S., Hao, J., & Guo, P. (2024) Transition to turbulence in hypersonic flow over a compression ramp due to upstream forcing. Journal of Fluid Mechanics, 999: A37.
  16. Cao, S., Hao, J., Guo, P., Wen, C-Y., & Klioutchnikov I. (2023) Stability of hypersonic flow over a curved compression ramp. Journal of Fluid Mechanics, 957: A8.
  17. Chen, Y., Guo, P.*, & Wen, C. Y. (2023) Consistent energy-based framework of amplification mechanisms for the second mode in hypersonic boundary layers. Physics of Fluids, 35(12): 124107.
  18. Guo, P., Shi, F., Gao, Z., Jiang, C., Lee, C. H., & Wen, C. Y. (2022) Sensitivity analysis on supersonic-boundary-layer stability: Parametric influence, optimization, and inverse design. Physics of Fluids, 34(10): 104113.
  19. Guo, P., Liu, X., Zhao, R., Hao, J., & Wen, C. Y. (2023) Effect of acoustic metasurface on hypersonic-boundary-layer wave packet. Physics of Fluids, 35(9): 094110.
  20. Guo, P., Gao, Z., Jiang, C., Lee, C. H. (2020) Linear stability analysis on the most unstable frequencies of supersonic flat-plate boundary layers. Computers & Fluids, 197: 104394.
  21. Guo, P., Gao, Z., Wu, Z., Liu, H., Jiang, C., & Lee, C. H. (2019) Investigations on the accurate prediction of supersonic shear layers for detached eddy simulation. Aerospace Science and Technology, 89: 46–57.
  22. Zhao, G., Wang, C. C., Li, X., Liu, X., Chen, Z., Uy, C. K., Hao, J., Guo, P., Zhang, Z., & Wen, C. Y. (2026) Convective instabilities in hypersonic compression ramp flows. AIAA Journal, accepted.
  23. Huang C., Cao S., Hao J., Guo P., & Wen, C. Y. (2025) Laminar-turbulent transition in a hypersonic compression ramp flow. Physics of Fluids, 37: 034110.
  24. Shi F., Guo, P., Liu, H., & Wang, T. (2024) Effect of vibrational excitation on vorticity amplification and transportation in shock/isotropic turbulence interaction: a numerical investigation. Physics of Fluids, 36: 085140.
  25. Long, T., Guo, P., Zhao, R., Wen, C. Y., & Ji, F. (2023) Energy growth of vortical, acoustic, and entropic components of the second-mode instability in the hypersonic boundary layer. Physics of Fluids, 35(5): 054104.
  26. Liu, X., Ma, D., Yang, M., Xia, X., & Guo, P. (2021) Modified block A* planning method for hybrid-driven underwater gliders. IEEE Journal of Oceanic Engineering, 47(1): 20–31.
  27. Shen, P., Niu, J., Guo, P., & Gu, S. (2026) A Modular Method of Characteristics Framework for Controllable-Length Hypersonic Nozzle Design. Advances in Aerodynamics, accepted.

arXiv Preprint Communications or other works

  1. Chen, Y., Guo, P.*, & Wen, C. Y. Role of acoustic metasurface in the nonlinear mode-mode interaction and breakdown of hypersonic boundary layer. (arXiv identifier: 2503.18369, accepted by JFM)
  2. Guo, P., Hao, J., & Wen, C. Y. Transition reversal over a blunt plate at Mach 5. (arXiv identifier: 2407.21629, accepted by JFM)
  3. Guo, P., Hao, J., & Wen, C. Y. Understanding the instability-wave selectivity of hypersonic compression ramp laminar flow. (arXiv identifier: 2404.11400, accepted by AIAAJ)
  4. Huang, C., Guo, P.*, Cao, S., & Wen, C. Y. On the significance of absolute and convective instabilities in transitional hypersonic compression ramp flows. Under review by JFM.
  5. Xu, B., Sun, C., & Guo, P.* A Central Differential Flux with High-Order Dissipation for Robust Simulations of Transcritical Flows. (arXiv identifier: 2508.21599, accepted by Journal of Computational Physics)
  6. Li, X. B., Chen, Y., Wen, C. Y. & Guo, P.* Nonlinear dynamics involving multiple modes in high-speed transitional boundary layer. (Under review by Journal of Fluid Mechanics, arXiv: 2603.16079)