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Professor Yonghao Zhang

Mechanical and Aerospace Engineering

Personal statement

Yonghao Zhang is Weir Professor of Thermodynamics and Fluid Mechanics and Director of James Weir Fluids Laboratory (http://www.jwfl.org.uk). His ambition is to lead JWFL to advance our understanding of fundamental flow physics and chemistry in micro/nano systems, with the aim of utilising these research advances to develop new technologies with capabilities beyond any currently conceived.

His expertise is in the fluid dynamics of rarefied flows, which presents an important technological challenge, with long-term research and industrial implications. His group is among the first to develop lattice Boltzmann (LB) methods for simulating rarefied flows. In particular, they were the first to prove that high-order LB models can be reduced to the linearised BGK equation, giving confidence that LB models can be applied to highly rarefied gas dynamics. His group also developed a fast spectral method for solving the Boltzmann equation, considering different molecular potential models. His other research activities centre on complex flow physics, including multiphase flows, droplet technologies and granular flows. His research has been funded by the EPSRC, EU FP7, STFC, Royal Society of Edinburgh, and the Leverhulme Trust. 

Expertise

Has expertise in:

    My research has mainly been on understanding multi-scale and multi-physical flow physics through theoretical, computational and experimental studies. My group has developed a suite of computational models for gas non-equilibrium flows and multiphase flows, especially at the micro/nano scales. These models can be exploited for both fundamental research and engineering design simulations. We have recently been applying our models for pore scale study of unconventional gas flows in ultra-tight porous media, multiphase flows in porous media, and droplet dynamics in microfluidic channels. While we continue our effort to improve our models, we expand our work to erosion and corrosion of oil pipelines, fluids/surface interactions, and vacuum technologies.

Publications

A hybrid lattice Boltzmann and finite difference method for droplet dynamics with insoluble surfactants
Liu Haihu, Ba Yan, Wu Lei, Li Zhen, Xi Guang, Zhang Yonghao
Journal of Fluid Mechanics Vol 837, pp. 381-412, (2018)
http://dx.doi.org/10.1017/jfm.2017.859
A comparative study of discrete velocity methods for low-speed rarefied gas flows
Wang Peng, Ho Minh Tuan, Wu Lei, Guo Zhaoli, Zhang Yonghao
Computers and Fluids Vol 161, pp. 33-46, (2018)
http://dx.doi.org/10.1016/j.compfluid.2017.11.006
Color-gradient lattice Boltzmann modeling of immiscible two-phase flows on partially wetting surface
Yu Yuan, Liu Haihu, Zhang Yonghao, Liang Dong
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, (2017)
Rarefaction cloaking : influence of the fractal rough surface in gas slider bearings
Su Wei, Liu Haihu, Zhang Yonghao, Wu Lei
Physics of Fluids Vol 29, (2017)
http://dx.doi.org/10.1063/1.4999696
A comparative study of boundary conditions for lattice Boltzmann simulations of high Reynolds number flows
Hu Kainan, Meng Jianping, Zhang Hongwu, Gu Xiao-Jun, Emerson David R, Zhang Yonghao
Computers and Fluids Vol 156, pp. 1-8, (2017)
http://dx.doi.org/10.1016/j.compfluid.2017.06.008
Lattice Boltzmann simulation of the trapping of a microdroplet in a well of surface energy
Liu Haihu, Zhang Yonghao
Computers and Fluids Vol 155, pp. 68-75, (2017)
http://dx.doi.org/10.1016/j.compfluid.2016.10.031

more publications

Research interests

I have been working on understanding fluid behaviour at micron scale for many years. My research focuses are:

  • microfluidics: device optimal design and operation;
  • experimental and numerical study of microdroplet technology;
  • modelling non-equilibrium fluid flows;
  • lattice Boltzmann method;
  • granualar flows

Projects

Doctoral Training Partnership (DTP 2016-2017 University of Strathclyde) | Houston, Gemma
Lappa, Marcello (Principal Investigator) Zhang, Yonghao (Co-investigator) Houston, Gemma (Research Co-investigator)
Period 01-Oct-2017 - 01-Apr-2021
Multi-scale and multi-physics high-order lattice Boltzmann modelling of shale gas transport
Wu, Lei (Principal Investigator) Zhang, Yonghao (Co-investigator)
Period 01-Mar-2017 - 28-Feb-2019
Non-Equilibrium Fluid Dynamics for Micro/Nano Engineering Systems | Ritos, Konstantinos
Zhang, Yonghao (Co-investigator) Ritos, Konstantinos (Research Co-investigator)
Period 01-Feb-2011 - 16-Dec-2014
Non-Equilibrium Fluid Dynamics for Micro/Nano Engineering Systems | Docherty, Stephanie
Zhang, Yonghao (Co-investigator)
Period 01-Oct-2011 - 07-Oct-2015
Virtual Design and Experiment Platform for Microfluidic Technologies
Zhang, Yonghao (Principal Investigator)
Period 01-Oct-2012 - 31-Mar-2017
Multi scale modelling of non-equilibrium gas flows
Zhang, Yonghao (Principal Investigator)
Period 01-Feb-2016 - 31-Mar-2016

more projects

Address

Mechanical and Aerospace Engineering
James Weir Building

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