6 papers
A Compression-Directional Entropic Stress Method for Shock-Regularized Compressible Flow
Bonan Xu, Chihyung Wen, Peixu Guo
We introduce the Compression-Directional Entropic Stress (CoDeS) method inspired by information geometric regularization. CoDeS replaces scalar multidimensional entropic pressure w…
Nonlinear dynamics involving multiple modes in high-speed transitional boundary layer
Xiao-Bai Li, Yifeng Chen, Chihyung Wen +1
Extensive studies have investigated the transition mechanism of boundary layers initiated by a single primary instability. In a real-world scenario, however, multiple primary insta…
A Central Differential Flux with High-Order Dissipation for Robust Simulations of Transcritical Flows
Bonan Xu, Chang Sun, Peixu Guo
The simulation of transcritical flows remains challenging due to strong thermodynamic nonlinearities that induce spurious pressure oscillations in conventional schemes.While primit…
Role of acoustic metasurface in the nonlinear mode-mode interaction and breakdown of hypersonic boundary layer
Yifeng Chen, Peixu Guo, Chihyung Wen
Boundary-layer instability and transition control have drawn extensive attention from the hypersonic community. The acoustic metasurface has become a promising passive control meth…
Understanding the instability-wave selectivity of hypersonic compression ramp laminar flow
Peixu Guo, Jiaao Hao, Chih-Yung Wen
The hypersonic flow stability over a two-dimensional compression corner is studied using resolvent analysis, linear stability theory (LST) and parabolised stability equation (PSE).…
Transition reversal over a blunt plate at Mach 5
Peixu Guo, Jiaao Hao, Chih-Yung Wen
In this work, the stability and transition to turbulence over a blunt flat plate with different leading-edge radii are investigated computationally. The freestream Mach number is 5…