Imperial College London

DrJanetWong

Faculty of EngineeringDepartment of Mechanical Engineering

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 8991j.wong

 
 
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Location

 

671City and Guilds BuildingSouth Kensington Campus

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Summary

 

Overview

Welcome to the Wong Group

The structure and dynamics of complex fluids are strongly affected by the stress, temperatures and degree of confinement. We apply fluorescence spectroscopy and imaging to polymers and complex fluids under extreme conditions.

We are particular interested in phase stabilities, and phase transitions of bulk fluids and confined fluids at high stress and high temperature conditions. One of such complex fluids in extreme condition is lubricant in a tribological contact. Our work allows various information such as lubricant structures and viscosity, phase transition, aggregation, adsorption, and self-assembly of additives, lubricant flow to be obtained.  When combined with mechanical testing snd film thickness measurements, the molecular origins of mechanical responses of lubricated system is established.

PHD OPPORTUNITIES IN EXPERIMENTAL PROJECT ON FUEL/LUBE MIXING

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Applications are invited for a research studentship in the field of Fuels and Lubricants, leading to the award of a PhD degree. The post is supported by a bursary and fees (at the UK/EU student rate only) and sponsored by Shell. The studentship is for three and a half years from June 2020.

Lubricants are used in engines to reduce friction, to improve machine efficiency and thus reduce greenhouse gas emissions. Fuel, however may mix with the lubricant during operation, affecting the effectiveness of the lubricant. The proposed research programme is a fundamental study of the influence of fuel on properties of lubricant, with in-situ measurements to be carried out in a modified engine, using various spectroscopic techniques.

The project is sponsored by the Shell University Technology Centre (UTC) for Lubricants and Fuels based in the Mechanical Engineering Department, Imperial College London, and will take place in the Tribology Group and the Thermofluids Division in this Department. Both the Tribology Group and the Thermofluids Division are world leaders in their respective fields of tribology, fluid flow, heat and mass transfer, and combustion. Together, they comprise of more than 90 PhD students as well as many post-doctoral researchers and academic staff. It offers a vibrant and multicultural working environment. Laboratories were recently refurbished and are well equipped with an extensive range of instrumentation and extensive computer facilities.

You will be an enthusiastic and self-motivated person who meets the academic requirements for enrolment for the PhD degree at Imperial College London. You will be an experimentalist and will have a background in Chemical or Mechanical Engineering, Chemistry, Physics or a related field. You will have an enquiring and rigorous approach to research, together with a strong intellect and disciplined work habits. An interest in engines and basic understanding of their operation with good practical skills is desirable. Training will be given in tribology, thermofluids and the relevant investigative techniques. You will become a skilled communicator, comfortable in an international situation. Good team-working, observational and communication skills are essential. The project will involve close collaboration with Shell and you will be expected to visit and communicate with various Shell centres around the world.

To find out more about research in tribology at Imperial College London, go to:

http://www.imperial.ac.uk/tribology

For information on how to apply, go to:

http://www.imperial.ac.uk/mechanical-engineering/study/phd/how-to-apply/

For further details of the post please contact Dr Sarah Matthews (sarah.matthews@shell.com) or Dr Janet Wong (j.wong@imperial.ac.uk). Interested applicants should email an up-to-date curriculum vitae. Suitable candidates will be required to complete an electronic application form available on the Imperial College London website in order for their qualifications to be assessed by the College Registry.

PhD Position in Experimental Mechanochemistry

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Applications are invited for a research studentship in the field of Mechanochemistry, with a focus in Tribology, leading to the award of a PhD degree.  The post is supported by a bursary and fees (at the UK student rate) provided by the EPSRC / Shell.  EPSRC candidates should fulfil the eligibility criteria for the award.  International candidates will be considered.

Lubricants are complex fluids whose are crucial the efficiency and durability of machines. They consists of a base fluid and multiple functional additives. Some of these additives, including friction modifiers and antiwear additives, are surface actives and form protective films on rubbing surfaces. It is now realised that the reactions by which these protective films (tribofilms) are formed are driven by the enormous mechanical forces experienced by individual additive molecules within rubbing contacts, i.e. mechanochemistry. The ability of these additives to form tribofilms is thus determined by the way their molecular structure experiences and responds to applied forces.

 

This project is experimental and will explore the influence of molecular structure of model lubricant additives on tribofilm formation and composition. Of particular interest will be phosphate esters and some friction modifiers likely to be used in electric vehicle transmission oils.  It will employ advanced tribology test equipment to form and monitor in situ the kinetics of formation and composition of tribofilms using advanced laser spectroscopies. Based on this it will determine the molecular mechanisms of tribofilm formation involved. 

 

You will be an enthusiastic and self-motivated person who meets the academic requirements for enrolment for the PhD degree at Imperial College London. You will have a 1st class honours degree in chemistry, chemical engineering, mechanical engineering or a related subject, and an enquiring and rigorous approach to research together with a strong intellect and disciplined work habits. An interest in chemistry and engineering is essential.  Good team-working, observational and communication skills are essential. You will be required to communicate with the industrial partners, will have the opportunity to attend multiple international conferences during your PhD and publish your work in scientific journals.

To find out more about research at Imperial College London in this area, go to:

https://www.imperial.ac.uk/mechanical-engineering/research/

 

For information on how to apply, go to:

http://www.imperial.ac.uk/mechanical-engineering/study/phd/how-to-apply/

 

For further details of the post contact Dr Janet Wong  j.wong@imperial.ac.uk Interested applicants should send an up-to-date curriculum vitae to Dr Wong.  Suitable candidates will be required to complete an electronic application form at Imperial College London in order for their qualifications to be addressed by College Registry.