Dr Yongling Zhao

PhD
Postdoctoral Research Associate
School of Civil Engineering

J05 - J05 Civil Engineering Building
The University of Sydney

Telephone +61 2 9351 2136
Fax +61 2 9351 3334

Website Centre for Wind, Waves and Water

School of Civil Engineering

Biographical details

Dr Yongling Zhao joined the Centre for Wind, Water and Waves at the University of Sydney in 2016. Yongling completed a PhD in fluid mechanics at the University of Sydney in 2015. He then worked as an R&D supervisor in TICA & UTC joint venture, and as an academic at the Yangzhou University. His research focuses on instability and transition of natural convection boundary layers, and their implication to heat transfer enhancement. In particular he seeks to understand and exploit the connections between the instability characteristics of thermal boundary layers and flow resonance-based heat transfer enhancement technologies. He is also interested in large-scale environmental flows, such as the pollutant transportations in lakes and reservoirs. Yongling was a recipient of the Civil Engineering Foundation Governor's Scholarship and the Certificate of Research Excellence 2013 from the University of Sydney.

Research interests

Dr Yongling Zhao's research focuses on buoyancy-driven flows, which occur widely in our daily life: they include the flows of warmer and cooler air within an air-conditioning system, and the flows of warmer and cooler water that develop in a lake or reservoir as a result of the sun's heat. Increasing our understanding of these phenomena will ultimately enhance the efficiency of our devices, the health of our environment and the comfort of our lives.

"Buoyancy-driven flows - whether of gases or liquids - are always associated with heat and mass transfer. Understanding them is crucial to addressing the problems associated with them, improving their efficiency and mitigating their environmental impacts. For example, our heating and cooling technologies depend on them, as does the quality of water within our lakes and reservoirs.

"My research focuses particularly on natural convection and the instability of natural thermal boundary layers - interfaces of warmer and cooler fluids - and their implications for enhancing heat transfer. I'm also interested in large-scale environmental flows, such as the transport of pollutants in lakes and reservoirs.

"One project I undertook revealed that the heat transfer of natural convection could be greatly enhanced by triggering 'resonance' of the flow. This is a behaviour that occurs when external disturbance is added to a system. What I found was that the frequency of the external disturbance must match the frequency of the system. If this is the case, then even a very small (negligible in terms of energy) external disturbance can induce resonance behaviour and greatly enhance heat transfer and dissipation.

"This research outcome attracted the attention of a leading telecommunications equipment company, which approached me to discuss the possibility of applying resonance-based heat transfer enhancement technology to its telecommunications equipment.

"I've been working in this field since 2011, when I joined the University of Sydney as a PhD candidate. The University of Sydney means a lot to me. Throughout my education here, tremendous mentors inspired me, and the passion and the attitude here continues to inspire and encourage me in my research."

Selected publications

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Journals

  • Zhao, Y., Lei, C., Patterson, J. (2017). The K-type and H-type transitions of natural convection boundary layers. Journal of Fluid Mechanics, 824, 352-387. [More Information]
  • Zhao, Y., Lei, C., Patterson, J. (2016). Natural transition in natural convection boundary layers. International Communications in Heat and Mass Transfer, 76, 366-375. [More Information]
  • Zhao, Y., Lei, C., Patterson, J. (2015). A PIV measurement of the natural transition of a natural convection boundary layer. Experiments in Fluids: experimental methods and their applications to fluid flow, 56(1), 1-10. [More Information]
  • Zhao, Y., Lei, C., Patterson, J. (2014). Transition of natural convection boundary layers-a revisit by Bicoherence analysis. International Communications in Heat and Mass Transfer, 58, 147-155. [More Information]
  • Zhao, Y., Lei, C., Patterson, J. (2013). Resonance of the thermal boundary layer adjacent to an isothermally heated vertical surface. Journal of Fluid Mechanics, 724, 305-336. [More Information]
  • Zhao, Y., Hu, E., Blazewicz, A. (2012). A comparison of three adsorption equations and sensitivity study of parameter uncertainty effects on adsorption refrigeration thermal performance estimation. Heat and Mass Transfer, 48(2), 217-226. [More Information]
  • Zhao, Y., Hu, E., Blazewicz, A. (2012). A non-uniform pressure and transient boundary condition based dynamic modeling of the adsorption process of an adsorption refrigeration tube. Applied Energy, 90(1), 280-287. [More Information]
  • Zhao, Y., Hu, E., Blazewicz, A. (2012). Dynamic modelling of an activated carbon-methanol adsorption refrigeration tube with considerations of interfacial convection and transient pressure process. Applied Energy, 95, 276-284. [More Information]

Conferences

  • Zhao, Y., Hu, E., Blazewicz, A. (2017). Dynamic modelling of the desorption process of a novel adsorption refrigeration tube. International Conference on Applied Energy, Singapore.
  • Zhao, Y., Lei, C., Patterson, J. (2017). Effects of surface curvature on the thermal boundary layer developing along the surface of an isothermally heated vertical cylinder. The 7th International Symposium on Advances in Computational Heat Transfer (CHT-17 ICHMT), Naples, Italy: ICHMT - International Centre for Heat and Mass Transfer Online Digital Library.
  • Zhao, Y., Lei, C., Patterson, J. (2017). PIV measurement of the K-type transition of a natural convection boundary layer. 9th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics (ExHFT-9), Brazil.
  • Zhao, Y., Lei, C., Patterson, J. (2014). On the K-type transition in natural convection boundary layers. International Symposium on Convective Heat and Mass Transfer (CONV-14), Kusadasi, Turkey: Begell House Inc.
  • Zhao, Y., Lei, C., Patterson, J. (2014). PIV Measurements of the Spanwise Flow Characteristics in a Naturally Transitioning Natural Convection Boundary Layer. 19th Australasian Fluid Mechanics Conference, Melbourne: RMIT University.
  • Zhao, Y., Lei, C., Patterson, J. (2014). Transition in a natural convection boundary layer. 15th International Heat Transfer Conference (IHTC 2014), Kyoto: Begell House Inc. [More Information]
  • Zhao, Y., Lei, C., Patterson, J. (2013). Evolution of wave nonlinear interactions in a transitioning buoyant boundary-flow. The 8th Australian Natural Convection Workshop, Sydney.
  • Zhao, Y., Lei, C., Patterson, J. (2012). Response of a vertical natural convection boundary layer to random and single-mode perturbations. 18th Australasian Fluid Mechanics Conference AFMC 2012, Launceston, Tasmania: Australasian Fluid Mechanics Society.

2017

  • Zhao, Y., Hu, E., Blazewicz, A. (2017). Dynamic modelling of the desorption process of a novel adsorption refrigeration tube. International Conference on Applied Energy, Singapore.
  • Zhao, Y., Lei, C., Patterson, J. (2017). Effects of surface curvature on the thermal boundary layer developing along the surface of an isothermally heated vertical cylinder. The 7th International Symposium on Advances in Computational Heat Transfer (CHT-17 ICHMT), Naples, Italy: ICHMT - International Centre for Heat and Mass Transfer Online Digital Library.
  • Zhao, Y., Lei, C., Patterson, J. (2017). PIV measurement of the K-type transition of a natural convection boundary layer. 9th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics (ExHFT-9), Brazil.
  • Zhao, Y., Lei, C., Patterson, J. (2017). The K-type and H-type transitions of natural convection boundary layers. Journal of Fluid Mechanics, 824, 352-387. [More Information]

2016

  • Zhao, Y., Lei, C., Patterson, J. (2016). Natural transition in natural convection boundary layers. International Communications in Heat and Mass Transfer, 76, 366-375. [More Information]

2015

  • Zhao, Y., Lei, C., Patterson, J. (2015). A PIV measurement of the natural transition of a natural convection boundary layer. Experiments in Fluids: experimental methods and their applications to fluid flow, 56(1), 1-10. [More Information]

2014

  • Zhao, Y., Lei, C., Patterson, J. (2014). On the K-type transition in natural convection boundary layers. International Symposium on Convective Heat and Mass Transfer (CONV-14), Kusadasi, Turkey: Begell House Inc.
  • Zhao, Y., Lei, C., Patterson, J. (2014). PIV Measurements of the Spanwise Flow Characteristics in a Naturally Transitioning Natural Convection Boundary Layer. 19th Australasian Fluid Mechanics Conference, Melbourne: RMIT University.
  • Zhao, Y., Lei, C., Patterson, J. (2014). Transition in a natural convection boundary layer. 15th International Heat Transfer Conference (IHTC 2014), Kyoto: Begell House Inc. [More Information]
  • Zhao, Y., Lei, C., Patterson, J. (2014). Transition of natural convection boundary layers-a revisit by Bicoherence analysis. International Communications in Heat and Mass Transfer, 58, 147-155. [More Information]

2013

  • Zhao, Y., Lei, C., Patterson, J. (2013). Evolution of wave nonlinear interactions in a transitioning buoyant boundary-flow. The 8th Australian Natural Convection Workshop, Sydney.
  • Zhao, Y., Lei, C., Patterson, J. (2013). Resonance of the thermal boundary layer adjacent to an isothermally heated vertical surface. Journal of Fluid Mechanics, 724, 305-336. [More Information]

2012

  • Zhao, Y., Hu, E., Blazewicz, A. (2012). A comparison of three adsorption equations and sensitivity study of parameter uncertainty effects on adsorption refrigeration thermal performance estimation. Heat and Mass Transfer, 48(2), 217-226. [More Information]
  • Zhao, Y., Hu, E., Blazewicz, A. (2012). A non-uniform pressure and transient boundary condition based dynamic modeling of the adsorption process of an adsorption refrigeration tube. Applied Energy, 90(1), 280-287. [More Information]
  • Zhao, Y., Hu, E., Blazewicz, A. (2012). Dynamic modelling of an activated carbon-methanol adsorption refrigeration tube with considerations of interfacial convection and transient pressure process. Applied Energy, 95, 276-284. [More Information]
  • Zhao, Y., Lei, C., Patterson, J. (2012). Response of a vertical natural convection boundary layer to random and single-mode perturbations. 18th Australasian Fluid Mechanics Conference AFMC 2012, Launceston, Tasmania: Australasian Fluid Mechanics Society.

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