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Bio
I conduct research into the rheology and forming of complex fluids (experiments and finite element simulations), CO2 sequestration with enhanced natural gas recovery (subsurface reservoir flows), and microclimate within aircraft. I use semi-analytical and finite element modelling to solve problems in these areas with experimental validation conducted wherever possible. I also investigate the accuracy of industry-standard mechanical characterisation tests, publish critiques and suggest improvements.
RESEARCH EXPERIENCE
I developed the most physically representative finite element models of particulate paste extrusion, film formation of polymer nanocomposites and dough net shape forming via sheeting. These models were designed to help solve processing problems such as phase separation during extrusion, cracking in high-performance polymer nanocomposite coatings and mass flow rate instability during dough sheeting, and were validated by experimental collaborators where possible. I have expertise in simulating many rheologies of engineering interest, i.e. Newtonian, non-linear elastic/viscoelastic, Mullins damage, plasticity/viscoplasticity and critical state/purely dilatant soils. In addition to forming processes, I have modelled the mechanical characterisation tests used to design several feedstock materials, revealed critical flaws in their operation and described replacement test protocols.
Over the past three years, I expanded my research to include reservoir simulation of CO2 sequestration with Enhanced Gas Recovery – EGR. Final gas recovery in a EGR setting depends in part on CO2 injection rate, physical dispersion between CO2 and nascent natural gas and rock tortuosity. My paper in the high-impact journal ENERGY is the first systematic study of the former two parameters on the efficacy of EGR with the first use of measured data for the latter parameter. I conducted the first systematic study of well depth and the role of formation water on the efficacy of EGR at realistic (supercritical) conditions. For this, I developed a novel, robust method for simulating chemical equilibrium, i.e. algebraic equations, simultaneously with the partial differential equations describing advection, dispersion and fluid flow in porous media. This method employed Lagrange multipliers to extend the finite element modelling capabilities within COMSOL Multiphysics to include vapour-liquid equilibrium within concentrated mixtures, and simplified modelling tremendously as a custom-designed thermochemical ‘flash’ module was no longer required to model subsurface chemistry.
Between 2010-2014, I conducted numerical and experimental research into grain food processing and testing. In 2013, a collaborative paper displaying the successful baking of Indian flatbreads using 100% Australian Sweet Lupin (ASL) flour supported successful lobbying by Lupin Foods Australia and the Department of Agriculture and Food Western Australia to reverse a two-decade old Government of India ban on ASL imports.
My PhD at the University of Cambridge focussed on the deployment of soil mechanics-derived constitutive models within chemical engineering-inspired process models for extrusion. It resulted in the first 'viscous soil' rheological model to be used to analyse the stability of flow of viscoplastic, phase-separating pastes during ram extrusion and uniaxial compression testing.
Research Interests
Papers共 24 篇Author StatisticsCo-AuthorSimilar Experts
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INTERNATIONAL JOURNAL OF COMPUTER INTEGRATED MANUFACTURINGno. 9 (2023): 1345-1361
FLUIDSno. 12 (2023): 307
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