Zhiyin Yang - Academia.edu (original) (raw)

Papers by Zhiyin Yang

Large-Eddy Simulation of a Two-Phase Plane Mixing-Layer

Springer Proceedings in Physics, 2009

This paper describes the Large-Eddy Simulation (LES) of a droplet laden mixing layer. The method ... more This paper describes the Large-Eddy Simulation (LES) of a droplet laden mixing layer. The method uses an Eulerian description of the carrier flow with a Lagrangian formulation for the dispersed phase. Special treatment of inlet conditions for both phases is critical. Sub-grid ...

A CFD INVESTIGATION OF FLOW-FIELD GEOMETRY'S EFFECT ON A TRANSIENT PERFORMANCE OF AUTOMOTIVE POLYMER ELECTROLYTE MEMBRANE FUEL CELL

Computational Thermal Sciences: An International Journal, 2015

On early stage instability of separated boundary layer transition

Large-eddy simulation of separated boundary layer transition

Coherent structures in separated boundary layer transition

Numerical simulation of twin impinging jets in a cross-flow

A comparative study of separated boundary layer transition on a flat plate with a blunt/semi-circular leading edge

A CFD study of twin Impinging jets in a cross-flow

The Open Numerical Methods Journal

Assessment of URANS approach for predicting twin impinging jets in a cross-flow

A numerical study of active flow control for low pressure turbine blades

Transient performance investigation of different flow-field designs of automotive polymer electrolyte membrane fuel cell using computational fluid dynamics

Large-eddy simulation: a glance at the past, a gaze at the present, a glimpse at the future

Numerical study of transition process in a separated boundary layer on a flat plate with two different leading edges

CFD study of effusion cooling

Numerical study of effusion cooling flow and heat transfer

Numerical study of instabilities in separated–reattached flows

Assessment of unsteady-RANS approach against steady-RANS approach for predicting twin impinging jets in a cross-flow

Cogent Engineering, 2014

Chinese Journal of Aeronautics, 2014

Large-eddy simulation (LES) was originally proposed for simulating atmospheric flows in the 1960s... more Large-eddy simulation (LES) was originally proposed for simulating atmospheric flows in the 1960s and has become one of the most promising and successful methodology for simulating turbulent flows with the improvement of computing power. It is now feasible to simulate complex engineering flows using LES. However, apart from the computing power, significant challenges still remain for LES to reach a level of maturity that brings this approach to the mainstream of engineering and industrial computations.This paper will describe briefly LES formalism first, present a quick glance at its history, review its current state focusing mainly on its applications in transitional flows and gas turbine combustor flows, discuss some major modelling and numerical challenges/issues that we are facing now and in the near future, and finish with the concluding remarks.

Internal Flow Modelling of Vortex Throttles

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 1991

A finite difference computer code has been used to predict highly swirling confined incompressibl... more A finite difference computer code has been used to predict highly swirling confined incompressible turbulent flow in vortex throttles. As turbulence can become highly anisotropic in such flow cases, both the widely used two-equation k-epsilon model and a Reynolds stress model have been used. The results have been compared with basic experimental data and the predicted flow structure within the throttles is related to the main design parameters. It has been found that the pressure drop across the vortex throttles occurs mainly through the axial port by dissipation of the high tangential velocity. Energy loss in the vortex chamber tends to reduce the vortex strength, lowering the tangential velocity and consequently reducing the pressure drop.

Large-scale structures at various stages of separated boundary layer transition

International Journal for Numerical Methods in Fluids, 2002

Large-eddy simulation is employed to investigate separated boundary layer transition induced by a... more Large-eddy simulation is employed to investigate separated boundary layer transition induced by a change of curvature of the surface. The geometry is a flat plate with a semi-circular leading edge. The Reynolds number based on the uniform inlet velocity and the leading edge diameter is 3450. The simulated mean and turbulence quantities compare well with the available experimental data. The