*Ph.d (Queensland University of Technology), B.Sc (Hons) (University of Newcastle)*

Professor Troy Farrell’s frontline technical skills blend applied mathematics with physical chemistry, and are applied to the mathematical modelling and numerical simulation of chemical systems of great industrial significance. Applications of his research include batteries, dye-sensitised solar cells, drying of colloidal droplets, and oxidation of biomass stockpiles. His work is mainly undertaken in collaboration with industrial partners, for whom his technical ability would not be applicable without supporting attributes including his work ethic, interpersonal skills, and willingness to undertake confidential research. Professor Farrell is very active in the wider applied and industrial mathematics community, especially within Australia and New Zealand. He is passionate about communicating the relevance, applicability and effectiveness of mathematics to a broad range of stakeholders in the Science, Technology, Engineering and Mathematics community including students, other academics and industry and business leaders. He is also passionate about facilitating connections between early career researchers and industry.

**Areas of Expertise**

- Industrial and applied mathematical modelling and simulation
- Electrochemical systems
- Multiscale porous media
- Perturbation methods
- Liquid/binary gas interfaces

**Academic Leadership**

*National Roles:*

- Executive Dean - Faculty of Science, QUT (2021 - current).
- Deputy Dean - Science and Engineering Faculty, QUT (2019 - 2020).
- Head of School - Mathematical Sciences, QUT (2015 - 2019).
- Mathematics in Industry Study Group (MISG) Director (2012 - 2015).
- ATN Industry Doctoral Training Centre (IDTC) Node Leader (2013 - 2016).

*State Roles:*

- Queensland Studies Authority (QSA) State review Panel Member (Mathematics C) (2007 - 2013).

**Current Research Projects**

- The mathematical modelling of the production of bio-fuels from cellulosic materials. This project specifically considers the acid pretreatment and the enzymatic hydrolysis of bagasse (sugar cane fibre residue).
- The mathematical modelling of electrochemical nano-dioides. These are nano-porous devices that rectify the passage of current in an electrolyte solution. This project considers electric double layer formation and interaction, charge transport in electrolyte solution using Poisson-Nernst-Planck and modified Poisson-Nernst-Planck models as well as discrete to continuum approaches for modelling low density flows.
- The optimisation of metal-air batteries. This work involves a complementary experimental and mathematical modelling approach to provide decision support capabilities for the understanding and subsequent optimisation of lithium-air electrodes for secondary batteries.
- The multiscale, mathematical modelling of periodic porous materials using a hybrid continuum/particle based approach. This projects considers the integration of microscopic scale particle based models (Smooth Particle Hydrodynamics, Lattice Boltzmann and Boundary Element) for high-dimensional Stokes flow with continuum flow (conservation of momentum and mass equations) at mesoscopic and macroscopic size scales.
- Modelling the uptake of agrochemicals through the cuticular membranes of plant leaves. This project aims to develop novel mathematical models of chemical uptake in plants. It is envisaged that such models can then be utilised to better understand this process as well as develop more efficacious agrochemicals..
- The Intermittent Microwave Convective (IMWC) Drying of food. This project is developing multiphase, multicomponent mathematical models of food materials that account for free and bound water transport and material deformation during drying.
- Predicting the component gas concentrations of coal seam gas (CSG) reservoirs over time using a mathematical modelling approach. This project develops a population of models (PoMs) to predict the changing gas composition at a CSG compression facility. The individual reservoir models that feed into the PoMs are volume averaged unsaturated porous flow models that account for multicomponent liquid and gas transport within the matrix and cleat scales of individual coal seams.
- Thermal Modelling of Large-Scale Biomass Stockpiles. This project addresses the important problem of preventing spontaneous combustion in large stockpiles of bagasse (sugar cane fibre residue). This will significantly extend its availability for renewable energy products.
- Phase field modelling of Lithium Metal Phosphate Batteries. This project is looking at the development and numerical solution of mutliscale, high-dimensional, Cahn-Hilliard Reaction models to predict the phase change behaviour within secondary, lithium-ion batteries. Such model systems are notoriously difficult to solve accurately and novel numerical approaches have been developed to achieve this.

### Additional information

**Research Experience** My research expertise is a combination of **Applied Mathematics** and **Physical Chemistry**, specifically related to industrial systems in the area of **energy technology**. The key points relating to my research activities are as follows:

- The significance of my work stems from its high degree of industrial relevancy. It has had
**high impact**in; and been extremely well received by; the industries to which it is targeted. This is underpinned by a significant record of long-term and**ongoing collaboration with industry**. - I have a strong record of
**external research funding**(in excess of $2.8M in external funding from 2000 to 2015) including 7 nationally competitive grants, 1 Qld State Government award and 7 industry funded grants. - I have a strong record of
**leading research teams**to facilitate the successful completion of large-scale projects. - I have a good
**record of publications in high quality**(Q1) academic journals. - I have undertaken several at-scale,
**commercial-in-confidence research projects**for large companies.

- Type
- Academic Honours, Prestigious Awards or Prizes
- Reference year
- 2015
- Details
- "For outstanding research and distinguished service to the field of Applied Mathematics". This prestigious national mid-career researcher award is awarded by the Australian and New Zealand Industrial and Applied Mathematics Division of the Australian Mathematical Society.

- Type
- Keynote Speaker/Expert Panel Member/Invited Speaker for a Conference
- Reference year
- 2015
- Details
- Invited keynote presentation, "Mathematical modelling of multiphysics electrochemical devices". Chicago, Illinois, May 24-28, 2015.

- Type
- Keynote Speaker/Expert Panel Member/Invited Speaker for a Conference
- Reference year
- 2015
- Details
- Invited keynote presentation, "A comparison of the Nernst-Planck and Maxwell-Stefan approaches to modelling multicomponent charge transport in electrolyte solutions". Flinders University, Adelaide, Australia, Sept. 28 - Oct. 1, 2015.

- Type
- Keynote Speaker/Expert Panel Member/Invited Speaker for a Conference
- Reference year
- 2015
- Details
- Funded invited mentor and project convenor, "Secondary current modelling in porous alkaline battery cathodes". Malaysian Mathematical Modelling Camp, Mar. 30 - Apr. 3, 2015.

- Type
- Keynote Speaker/Expert Panel Member/Invited Speaker for a Conference
- Reference year
- 2014
- Details
- Funded invited keynote, "Mathematics for Industry: A Mining and Resources Case Study". Mathematics for Industry Forum, Oct. 27-31, 2014.

- Type
- Academic Honours, Prestigious Awards or Prizes
- Reference year
- 2013
- Details
- "For exceptional sustained performance and outstanding achievement in Partnerships and Engagement". This is the highest staff award at QUT and recognises my performance in developing industry research focused engagement and external partnerships in the Mathematical Sciences at QUT. This award is accompanied by a $10K stipend.

- Type
- Keynote Speaker/Expert Panel Member/Invited Speaker for a Conference
- Reference year
- 2013
- Details
- Funded invited plenary, "Mathematical Modelling of LiFePO4 Cathodes". Battery and Fuel Cells Workshop, IPAM, Nov. 4-8, UCLA, USA.

- Type
- Keynote Speaker/Expert Panel Member/Invited Speaker for a Conference
- Reference year
- 2013
- Details
- Funded invited plenary lecture - "Phase Field Modelling of Battery Cathodes", July 1-5, 2013, Oxford University, UK.

- Type
- Academic Honours, Prestigious Awards or Prizes
- Reference year
- 2006
- Details
- "For outstanding contributions to student learning". This is a national teaching award for my work in improving student learning outcomes whilst part of a small but dedicated team teaching Applied Mathematics to large engineering mathematics cohorts.

- Oberman G, Farrell T, (2016)
*Modelling of the evaporation of a droplet suspended in a binary atmosphere*, International Journal of Heat and Mass Transfer, 92, pp. 381-393. - Kumar C, Joardder M, Farrell T, Millar G, Karim A, (2016)
*Mathematical model for intermittent microwave convective drying of food materials*, Drying Technology, 34 (8), pp. 962-973. - Greenwood A, Farrell T, Zhang Z, O'Hara I, (2015)
*A novel population balance model for the dilute acid hydrolysis of hemicellulose*, Biotechnology for Biofuels, 8, pp. 1-27. - Jiang Z, Mariethoz G, Farrell T, Schrank C, Cox M, (2015)
*Characterization of alluvial formation by stochastic modelling of paleo-fluvial processes: The concept and method*, Journal of Hydrology, 524, pp. 367-377. - Psaltis S, Farrell T, Burrage K, Burrage P, McCabe P, Moroney T, Turner I, Mazumder S, (2015)
*Mathematical modelling of gas production and compositional shift of a CSG (coal seam gas) field: Local model development*, Energy, 88, pp. 621-635. - Dargaville S, Farrell T, (2013)
*A comparison of mathematical models for phase-change in high-rate LiFePO4 cathodes*, Electrochimica Acta, 111, pp. 474-490. - Dargaville S, Farrell T, (2013)
*The persistence of phase-separation in LiFePO4 with two-dimensional Li+ transport: The Cahn-Hilliard-reaction equation and the role of defects*, Electrochimica Acta, 94, pp. 143-158. - Greenwood A, Farrell T, O'Hara I, (2013)
*Understanding mild acid pretreatment of sugarcane bagasse through particle scale modeling*, Biotechnology and Bioengineering, 110 (12), pp. 3114-3125. - Psaltis S, Farrell T, (2011)
*Comparing charge transport predictions for a ternary electrolyte using the Maxwell-Stefan and Nernst-Planck equations*, Journal of the Electrochemical Society, 158 (1). - Dargaville S, Farrell T, (2010)
*Predicting active material utilisation in LiFePO4 electrodes using a multi-scale mathematical model*, Journal of the Electrochemical Society, 157 (7), pp. 830-840.

- Title
- Degradation Conscious Grid-Scale Battery Energy Management Scheme
- Primary fund type
- CAT 1 - Australian Competitive Grant
- Project ID
- DP160101325
- Start year
- 2016
- Keywords

- Title
- Improving returns from Southern Pine Plantations through innovative Resource Characterisation
- Primary fund type
- CAT 1 - Australian Competitive Grant
- Project ID
- Start year
- 2015
- Keywords
- Mathematical Modelling; Numerical Simulation

- Title
- Biomass Characterisation Facility for Extended Stockpile Model Accuracy and Capability (3951/3952)
- Primary fund type
- CAT 1 - Australian Competitive Grant
- Project ID
- QUT049
- Start year
- 2011
- Keywords
- Biomass; Combustion; Model; Spontaneous; Storage

- Title
- Multiscale Modelling and Thermal Design Optimisation of Large-Scale Biomass Stockpiles for Use in Renewable Energy Products
- Primary fund type
- CAT 1 - Australian Competitive Grant
- Project ID
- LP0775269
- Start year
- 2007
- Keywords
- bagasse storage; mathematical modelling; finite volume; self heating; mulitscale

- Mathematical Modelling of Fumigant Transport in Stored Grain (2014)
- Mathematical Modelling of Intramembranous Bone Formation During Fracture Healing (2014)
- Mathematical Modelling of LiFePO4 Cathodes (2013)
- The Effect of Juice Composition on the Scaling Rate and Scale Composition in Sugar Mill Evaporators (2013)
- Multicomponent charge transport in electrolyte solutions (2012)
- Mathematical Modelling of the Drying of Sol Gel Microspheres (2011)
- Mathematical Modelling of Primary Alkaline Batteries (2007)
- An Investigation of a Finite Volume Method Incorporating Radial Basis Functions for Simulating Nonlinear Transport (2006)
- Mathematical Modelling of Dye-Sensitised Solar Cells (2006)