Academic Staff

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 is now a Research Assistant Professor in AAE. 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 ten journal papers in J. Fluid Mech., Phys. Fluids, AIAA J., Chin. J. Aeronaut., etc. as the first/corresponding author. He also serves as project co-PI collaborating with the Academy of Aerospace Propulsion Technology, co-I of GRF project 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 corresponding author. Dr Guo is searching for academic collaboration with young scientists and students.

Recruitment

Dr Guo is currently looking for research assistants and PhD students to work on stability and transition, high-speed aerodynamics, direct numerical simulation, etc. Please send CV to peixu.guo@polyu.edu.hk if you are interested.

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

Selected Publications

1. 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.
2. 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.
3. 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.
4. 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.
5. 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)
6. 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.
7. 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, accepted.
8. 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.
9. 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.
10. 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.
11. 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.
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. 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.
14. 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.
15. 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.
16. 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.

arXiv Preprint Communications

1. Guo, P., Hao, J., & Wen, C. Y. Transition reversal over a blunt plate at Mach 5. Under review by Journal of Fluid Mechanics. (arXiv identifier: 2407.21629)
2. Guo, P., Hao, J., & Wen, C. Y. Understanding the instability-wave selectivity of hypersonic compression ramp laminar flow. Under review by AIAA Journal. (arXiv identifier: 2404.11400)