97 citations · 382 across the 18 of their papers we have counts for
18 papers
An Implicit Discrete Adjoint Gas-Kinetic Scheme for Aerodynamic Shape Optimization across all Mach Number Regimes
Hangkong Wu, Yuze Zhu, Yajun Zhu +1
The gas-kinetic scheme (GKS) integrates the characteristics of flux difference scheme (FDS) and flux vector splitting (FVS) scheme, providing high accuracy in smooth regions and st…
A Hybrid Gas-Kinetic Scheme and Discrete Velocity Method for Continuum and Rarefied Flows
Hangkong Wu, Yuze Zhu, Yajun Zhu +1
The gas-kinetic scheme (GKS) provides high computational efficiency and accuracy for continuum flow simulations but is unable to reliably capture rarefaction effects. In contrast,…
A Discrete Adjoint Gas-Kinetic Scheme for Aerodynamic Shape Optimization in Turbulent Continuum Flows
Hangkong Wu, Yuze Zhu, Yajun Zhu +1
This study presents an efficient and accurate discrete adjoint gas-kinetic scheme (GKS) for sensitivity analysis and aerodynamic shape optimization in continuum flow regimes. Devel…
A unified gas-kinetic framework from Boltzmann to Navier-Stokes scales
Zhaoli Guo, Kun Xu, Yajun Zhu
Neither molecular kinetics nor continuum fluid dynamics alone is adequate to describe multiscale gas flows across different regimes. Bridging these regimes within a single self-con…
Kinetic representation of the unified gas-kinetic wave-particle method and beyond
Zhaoli Guo, Yajun Zhu, Kun Xu
The unified gas-kinetic wave-particle (UGKWP) method is a hybrid method for multiscale flow simulations, in which the contributions to the whole gas evolution from deterministic hy…
Unified gas-kinetic wave-particle method for frequency-dependent radiation transport equation
Xiaojian Yang, Yajun Zhu, Chang Liu +1
The multi-frequency radiation transport equation (RTE) system models the photon transport and the energy exchange process between the background material and different frequency ph…
Unified gas-kinetic wave-particle methods VII: diatomic gas with rotational and vibrational nonequilibrium
Yufeng Wei, Yajun Zhu, Kun Xu
Hypersonic flow around a vehicle in near space flight is associated with multiscale non-equilibrium physics at a large variation of local Knudsen number from the leading edge highl…
High-order Unified Gas-kinetic Scheme
Gyuha Lim, Yajun Zhu, Kun Xu
In this paper, we present a high-order unified gas-kinetic scheme (UGKS) using the weighted essentially non-oscillatory with adaptive-order (WENO-AO) method for spatial reconstruct…
General Implicit Iterative Method for Unified Gas-kinetic Scheme
Xiaocong Xu, Yajun Zhu, Chang Liu +1
In order to further enhance the computational efficiency of the implicit unified gas-kinetic scheme (IUGKS, JCP 315 (2016) 16-38) for multi-scale flow simulation, a two-step IUGKS…
The first decade of unified gas kinetic scheme
Yajun Zhu, Kun Xu
In 2010, the unified gas kinetic scheme (UGKS) was proposed by Xu et al . (A unified gas-kinetic scheme for continuum and rarefied flows, Journal of Computational Physics, 2010). I…
A three-dimensional unified gas-kinetic wave-particle solver for flow computation in all regimes
Yipei Chen, Yajun Zhu, Kun Xu
In this paper, the unified gas-kinetic wave-particle (UGKWP) method has been constructed on three-dimensional unstructured mesh with parallel computing for multiscale flow simulati…
Ray Effect in Rarefied Flow Simulation
Yajun Zhu, Chengwen Zhong, Kun Xu
Ray effect usually appears in the radiative transfer when using discrete ordinates method (DOM) in the simulations. The cause and remedy for the ray effect have been intensively in…
Unified Gas-kinetic Wave-Particle Methods III: Multiscale Photon Transport
Weiming Li, Chang Liu, Yajun Zhu +2
In this paper, we extend the unified gas-kinetic wave-particle (UGKWP) method to the multiscale photon transport. In this method, the photon free streaming and scattering processes…
Unified Gas-kinetic Wave-Particle Methods II: Multiscale Simulation on Unstructured Mesh
Yajun Zhu, Chang Liu, Chengwen Zhong +1
In this paper, we present a unified gas-kinetic wave-particle (UGKWP) method on unstructured mesh for multiscale simulation of continuum and rarefied flow. Inheriting from the mult…
Unified Gas-kinetic Wave-Particle methods I: Continuum and Rarefied Gas Flow
Chang Liu, Yajun Zhu, Kun Xu
The unified gas-kinetic scheme (UGKS) provides a framework for simulating multiscale transport with the updates of both gas distribution function and macroscopic flow variables on…
A Unified Gas-kinetic Particle Method for Multiscale Photon Transport
Weiming Li, Chang Liu, Yajun Zhu +2
In this work, we present a unified gas-kinetic particle (UGKP) method for the simulation of multiscale photon transport. The multiscale nature of the particle method mainly comes f…
An Implicit Unified Gas-kinetic Scheme for Unsteady Flow in All Knudsen Regimes
Yajun Zhu, Chengwen Zhong, Kun Xu
The unified gas-kinetic scheme (UGKS) is a direct modeling method for multiple scale transports. The modeling scale of the scheme is the mesh size and time step, and the ratios of…
Unified Gas-kinetic Scheme with Multigrid Convergence for Rarefied Flow Study
Yajun Zhu, Chengwen Zhong, Kun Xu
The unified gas kinetic scheme (UGKS) is a direct modeling method based on the gas dynamical model on the mesh size and time step scales. With the implementation of particle transp…