97 citations · 730 across the 47 of their papers we have counts for
47 papers
A unified gas-kinetic wave-particle method for multiscale gas-mixture flow with an elementary chemical reaction
Junzhe Cao, Yufeng Wei, Wenpei Long +2
Hypersonic flows in the near space often couple continuum-rarefied multiscale effect with finite-rate chemistry. This paper extends the UGKWP method to multiscale gas mixture flows…
A second-order unified gas-kinetic wave-particle method with enhanced mesh independence for hypersonic flows
Junzhe Cao, Rui Zhang, Wenpei Long +2
Benefiting from the direct modeling of physical laws in a discretized space and the automatic decomposition of the gas distribution function into hydrodynamic waves and particles,…
A unified gas-kinetic wave-particle method for multiscale binary-species gas mixtures
Junzhe Cao, Yufeng Wei, Wenpei Long +2
This paper presents a unified gas-kinetic wave-particle (UGKWP) method for simulating multiscale binary-species gas mixtures. Benefiting from direct modeling in a discretized space…
The extended gas-kinetic theory from Pullin equation: the relaxation rates, transport coefficients and model equation
Sha Liu, Ningchao Ding, Ming Fang +4
The Borgnakke-Larsen model, widely used in rarefied flow predictions, serves as the mainstream energy-exchange kernel for polyatomic gases. However, it lacks integrability and does…
Phenomenological energy exchange of diatomic gases: Comparison of Pullin and Borgnakke-Larsen models in direct simulation Monte Carlo method
Hao Jin, Sha Liu, Ningchao Ding +4
In hypersonic rarefied flows, insufficient intermolecular collisions cause significant deviations between translational and rotational temperatures, leading to strong thermal noneq…
A simplified unified wave-particle method for diatomic gases with rotational and vibrational non-equilibrium
Sirui Yang, Chengwen Zhong, Ningchao Ding +4
The hypersonic flow around near-space vehicles constitutes a multi-scale flow problem. Due to insufficient molecular collisions to achieve equilibrium, rarefied gas effects are pre…
A hybrid numerical algorithm based on the stochastic particle Shakhov and DSMC method
Hao Jin, Sha Liu, Sirui Yang +3
The Direct Simulation Monte Carlo (DSMC) method is widely employed for simulating rarefied nonequilibrium gas flows. With advances in aerospace engineering and micro/nano-scale tec…
Adaptive criterion and modification of wave-particle decomposition in UGKWP method for high-speed flow simulation
Junzhe Cao, Yufeng Wei, Wenpei Long +2
Benefitting from the direct modeling of physical laws in a discretized space and the automatic decomposition of hydrodynamic waves and particles, the unified gas-kinetic wave-parti…
Simplified unified wave-particle method for diatomic gases based on Rykov model
Sirui Yang, Sha Liu, Junzhe Cao +1
During the past decades, the numerical methods based on Navier-Stokes (N-S) equations and direct simulation Monte Carlo (DSMC) methods have been proved effective in simulating flow…
A novel Cercignani-Lampis boundary model for discrete velocity methods in predicting rarefied and multi-scale flows
Jianfeng Chen, Sha Liu, Rui Zhang +5
To extend the discrete velocity method (DVM) and unified methods to more realistic boundary conditions, a Cercignani-Lampis (CL) boundary with different momentum and thermal energy…
A Multi-Scale Boltzmann Equation for Complex Systems of Neutral Gases across All Flow Regimes
Sha Liu, Junzhe Cao, Sirui Yang +1
A Multi-scale Boltzmann Equation (MBE) is found from the gas-kinetic theory and the direct modeling philosophy as a master equation for complex physical systems of neutral gases ac…
Hypersonic wave wall flow based on gas kinetic method
Yining Yang, Rui Zhang, Jianfeng Chen +4
The transition of hypersonic boundary layer can lead to a several-fold increase in surface heat flux and skin friction for the aircraft, significantly impacting its flight performa…
High-order gas-kinetic scheme with TENO class reconstruction for the Euler and Navier-Stokes equations
Junlei Mu, Congshan Zhuo, Qingdian Zhang +2
The high-order gas-kinetic scheme(HGKS) with WENO spatial reconstruction method has been extensively validated through many numerical experiments, demonstrating its superior accura…
A direct unified wave-particle method for simulating non-equilibrium flows
Junzhe Cao, Sha Liu, Sirui Yang +1
In this work, the Navier-Stokes (NS) solver is combined with the Direct simulation Monte Carlo (DSMC) solver in a direct way, under the wave-particle formulation [J. Comput. Phys.…
An efficient high-order gas-kinetic scheme with hybrid WENO-AO method for the Euler and Navier-Stokes solutions
Junlei Mu, Congshan Zhuo, Qingdian Zhang +2
The high-order gas-kinetic scheme (HGKS) features good robustness, high efficiency and satisfactory accuracy,the performaence of which can be further improved combined with WENO-AO…
A conservative implicit scheme for three-dimensional steady flows of diatomic gases in all flow regimes using unstructured meshes in the physical and velocity spaces
Rui Zhang, Sha Liu, Jianfeng Chen +2
A computationally accurate and efficient numerical method under a unified framework is crucial to various multi-scale scientific and engineering problems. So far, many numerical me…
A global adaptive velocity space for general discrete velocity framework in predictions of rarefied and multi-scale flows
Jianfeng Chen, Sha Liu, Rui Zhang +3
The rarefied flow and multi-scale flow are crucial for the aerodynamic design of spacecraft, ultra-low orbital vehicles and plumes. By introducing a discrete velocity space, the Bo…
Multiple solutions of nonlinear coupled constitutive relation model and its rectification in non-equilibrium flow computation
Junzhe Cao, Sha Liu, Chengwen Zhong +2
In this study, the multiple solutions of Nonlinear Coupled Constitutive Relation (NCCR) model are firstly observed and a way for identifying the physical solution is proposed. The…
Unified gas-kinetic scheme with simplified multi-scale numerical flux for thermodynamic non-equilibrium flow in all flow regimes
Rui Zhang, Sha Liu, Chengwen Zhong +1
In this paper, a unified gas-kinetic scheme (UGKS) with simplified multi-scale numerical flux is proposed for the thermodynamic non-equilibrium flow simulation involving the excita…
A gas-surface interaction algorithm for discrete velocity methods in predicting rarefied and multi-scale flows: For Maxwell boundary model
Jianfeng Chen, Sha Liu, Yong Wang +3
The rarefied flow and multi-scale flow are crucial for the aerodynamic design of spacecraft, ultra-low orbital vehicles and plumes. By introducing a discrete velocity space, the di…
Investigation of nonlinear squeeze-film damping involving rarefied gas effect in micro-electro-mechanical-systems
Yong Wang, Sha Liu, Congshan Zhuo +1
In this paper, the nonlinear squeeze-film damping (SFD) involving rarefied gas effect in the micro-electro-mechanical-systems (MEMS) is investigated. Considering the motion of stru…
A direct relaxation process for particle methods in gas kinetic theory
Sirui Yang, Sha Liu, Chengwen Zhong +2
The multi-scale flow mechanism is crucial for force and heat loaded on near-space and reentry vehicles, the control of spacecraft by thrusters, the propelling and cooling of MEMS,…
An implicit kinetic inviscid flux for predicting continuum flows in all speed regimes
Junzhe Cao, Sha Liu, Chengwen Zhong
In this study, the kinetic inviscid flux (KIF) is improved and an implicit strategy is coupled. The recently proposed KIF is a kind of inviscid flux, whose microscopic mechanism ma…
Performance evaluation of high-order reconstruction for discrete unified gas-kinetics scheme in tracking fluid interfaces
Zeren Yand, Chengwen Zhong, Congshan Zhuo
With a noticeable increase in research centered on modeling micro fluid interfaces in the framework of mesoscopic methods, we conduct an exhaustive study of discrete unified gas-ki…