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- Hong Kong University of Science and TechnologyHK80 papers
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6 papers · 1 filter
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…
Implicit High-Order Gas Kinetic Scheme for Turbulence Simulation
Guiyu Cao, Hongmin Su, Jinxiu Xu +1
In recent years, coupled with traditional turbulence models, the second-order gas-kinetic scheme (GKS) has been used in the turbulent flow simulations. At the same time, high-order…
A Unified Gas-kinetic Scheme for Continuum and Rarefied Flows VI: Dilute Disperse Gas-Particle Multiphase System
Chang Liu, Zhao Wang, Kun Xu
In this paper, a unified gas kinetic scheme for multiphase dilute gas-particle system is proposed. The UGKS multiphase (UGKS-M) is a finite volume method, which captures flow physi…
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…