Dr Shian Gao

Lecturer

Shian GaoDr Shian Gao
Lecturer in Thermofluids, Aerospace & Computational Engineering Research Group

Contact details

T: +44 (0)116 252 2536
F: +44 (0)116 252 2525
E: sg32@le.ac.uk

Location: Room 131, Michael Atiyah Building

Personal details

  • BSc (Petroleum, China)
  • PhD (London)

 

Selected Publications

 D. Fernando, S. Gao, and S. J. Garrett (2018), On the heat transfer effects of nanofluids within rotor-stator cavities", PHYSICS OF FLUIDS 30(8), 082007, https://doi.org/10.1063/1.5043264, Aug 2018

 D. Fernando, S. Gao, and S. J. Garrett (2018), The effect of surface roughness on rotor-stator cavity flows, Physics of Fluids 30, 064103 (2018); doi: 10.1063/1.5028209, Jun 2018

 Khaleel, A and Gao, S. (2018), Mixed convection heat transfer enhancement in a cubic lid-driven cavity containing a rotating cylinder through the introduction of artificial roughness on the heated wall, Physics of Fluids 30, 025103 (Feb 2018); https://doi.org/10.1063/1.5017474

 Khaleel, A and Gao, S. (2018), A comparison study of mixed convection heat transfer of turbulent nanofluid flow in a three-dimensional lid-driven enclosure with a clockwise versus an anticlockwise rotating cylinder, INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER 90:44-55, Jan 2018 

 Khaleel, A and Gao, S. (2017), Mixed convection heat transfer of turbulent flow in a three-dimensional lid-driven cavity with a rotating cylinder, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 112:185-200, Sep 2017

 Ahmed, A.Q. and Gao, S. (2017), Numerical investigation of height impact of local exhaust combined with an office work station on energy saving and indoor environment, Building and Environment 122:194-205, Sep 2017.

 Hawendi, S and Gao, S. (2017), Impact of windward inlet-opening positions on fluctuation characteristics of wind driven natural cross ventilation in an isolated house using LES, International Journal of Ventilation 1-27, Jul 2017

 Hawendi, S and Gao, S. (2017), Impact of an external boundary wall on indoor flow field and natural cross-ventilation in an isolated family house using numerical simulations, Journal of Building Engineering 10:109-123, Mar 2017

 Khaleel, A and Gao, S. (2017), Computational study of unsteady mixed convection heat transfer of nanofluids in a 3D closed lid-driven cavity, INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER 82:125-138, Mar 2017 

Ahmed, A.Q., Gao, S. and Khaleel, A. (2017), Energy saving and indoor thermal comfort evaluation using a novel local exhaust ventilation system for office rooms, Applied Thermal Engineering, Volume 110, January 2017, Pp 821–834

Kareem, A., Mohammed, H.A., Hussein, A.K. and Gao, S. (2016), Numerical investigation of mixed convection heat transfer of nanofluids in a lid-driven trapezoidal cavity, International Communications in Heat and Mass Transfer, Vol 99, October 2016, pp 195–205

 Khaleel, A., Gao, S. and Ahmed, A.Q. (2016), Unsteady simulations of mixed convection heat transfer in a 3D closed lid-driven cavity, International J Heat and Mass Transfer, Vol 100, October 2016, pp 121–130.

 Ahmed, A.Q., Gao, S. and Khaleel, A. (2016), A numerical study on the effects of exhaust locations on energy consumption and thermal environment in an office room served by displacement ventilation, Energy Conversion and Management, Vol 117, June 2016, pp 74–205

 McMullan, W.A., Gao, S. and Coats, C.M. (2015), Coherent structure evolution in turbulent mixing layers, Part 2: Large eddy simulation, Journal of Fluid Mechanics, vol. 762, pp. 302_343.

 Ma, C, Wu, X. and Gao, S. (2013) Analysis and applications of a two-phase closed thermosyphon for improving the fluid temperature distribution in wellbores, Applied Thermal Engineering, Volume 55, Issues 1–2, June 2013, pp 1-6.

 Srirattayawong, S. and Gao, S. (2013) A CFD study of the EHL line contact problem with consideration of the surface roughness, Computational Thermal Sciences, Volume 5, Issues 3, May 2013, pp 195-213.  

 McMullan, W.A., Gao, S. and Coats, C.M. (2009), The effect of inflow conditions on the transition to turbulence in large eddy simulations of spatially developing mixing layers, International Journal of Heat and Fluid Flow, Volume 30, Issue 6, December 2009, Pages 1054-1066.

 Gao, S., Leslie, D.C. and Hewitt, G.F. (2008), Improvements to the modelling of two-phase flow and heat transfer in a transient nuclear reactor analysis code, Applied Thermal Engineering,  Volume 28, Issues 8-9, June 2008, Pages 915-922.

 McMullan, W.A., Gao, S. and Coats, C.M. (2007), A comparative study of inflow conditions for two-and three-dimensional spatially developing mixing layers using Large Eddy Simulation, Int. J. for Numerical Methods in Fluids, Volume 55, Issue 6, Pages 589-610.

Research

My research interests are in computational fluid dynamics (CFD) and heat transfer, focusing mainly on large eddy simulation (LES) and direct numerical simulation (DNS) of turbulent flow and heat transfer, two-phase flow and heat transfer, and their industrial applications. Advanced research has been conducted on mixing layer flows, boundary layer transitions, near wake flows, thermal impinging jets and swirling jets. The emphasis is on developing novel simulation techniques for unsteady flows related to applications of engineering importance.

Dr Shian Gao - movie slice

A movie slice showing the instantaneous temperature distribution in an enclosed jet

I was a member of the LES/DNS research groups at Queen Mary of London University and Surrey University, and conducted successfully two major LES research projects funded by EPSRC, DERA and Nuclear Electric. I was also a member of a four-university consortium (Surrey, QMW London, Leicester and Cambridge) which collaborated successfully on an  EPSRC supported research project on large-eddy simulation of turbulence. The members of the consortium shared common research interests in the development of improved  numerical techniques for DNS/LES of turbulent flows and heat transfer and their application to a variety of industrial and environmental problems.

The computer codes developed by the consortium are widely used by research groups both in the UK and elsewhere in Europe. Among my current projects is one supporting the design of novel types of gas-turbine combustion system using LES  techniques, supported by Alstom Power and in collaboration with Dr Chris Coats. The project involves developing LES numerical techniques to simulate complex turbulent flows with significant recirculation and separation in relation to gas turbine combustion systems.

Numerical simulations have also been carried out on dynamic LES of mixing layer flows. The simulations performed have been among the first to apply the LES technique in 3-D to mixing layers developing spatially (rather than in time) and are thus among the first that can be compared directly with experimental data. They are also the first numerical simulations of any type to have followed the detailed evolution of the coherent structures through the mixing transition and into the high-Reynolds-number regime beyond and to have shown the same change in the growth mechanism as was  observed in the experiments. Further work in this area will be expanded to accommodate density variation and to study the effects of combustion heat release.

Dr Shian Gao - contours

Isovorticity contours for simulated spatially developing mixing layer

The advanced CFD techniques have also been applied to more wide applications in different science and engineering areas. One project in collaboration with Prof. Chris Binns of the Physics Department is employing such techniques to analyse the flow and thermal fields of nanoscale metal particles in a gas aggregation source.

Further work on two phase flow and heat transfer modelling has been successfully carried out on Ladle Degassing process, funded by Saudi Basic Industries Corporation, in collaboration with Professor Helen Atkinson. The project involves dynamic coupling of a commercial CFD code with a full thermodynamic prediction package which allows the accurate prediction of complex phase and flow  distributions. My other research covers topics on bio-fluid dynamics, oil and gas engineering, dynamic simulations of multiphase flow systems, finite volume simulation techniques and CFD code developments.

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