Publications

Google Scholar | Researchgate

Journal articles

1. R.Timms, S. Psaltis, C.P. Please, S.J. Chapman, Asymptotic reduction of a mechanical model for buckling behaviour in cylindrical batteries, Submitted to  Journal of the Mechanics and Physics of Solids, 2023.   

2. M.P. Bonkile, Y. Jiang, N. Kirkaldy,  V. Sulzer, R. Timms, H. Wang, G. Offer, and B. Wu , Coupled Electrochemical-Thermal-Mechanical Stress Modelling in Composite Silicon/Graphite Lithium-Ion Battery Electrodes, 2022 [preprint]

3. R. Timms, S. Psaltis, C.P. Please, S.J. Chapman, A mechanical model for reinforced, expanding spirally-wound layered materials,  Journal of the Mechanics and Physics of Solids, 2022. [preprint]

4. F. Brosa Planella, W. Ai, A. M. Boyce, A. Ghosh, I. Korotkin, S. Sahu, V. Sulzer, R. Timms, T. G. Tranter, M. Zyskin, S. J. Cooper, J. S. Edge, J. M. Foster, M. Marinescu, B. Wu, G. Richardson, A Continuum of Physics-Based Lithium-Ion Battery Models Reviewed, Progress in Energy, 2022. [arXiv preprint|code]

5. T.G. Tranter, R. Timms, V. Sulzer, F. Brosa Planella, G.M. Wiggins, S.V. Karra, P. Agarwal, S. Chopra , S. Allu, P.R. Shearing, and D.J. L. Brett, liionpack: A Python package for simulating packs of batteries with PyBaMM, The Journal of Open Source Software, 2022. [code]

6. S.E. J. O'Kane, W. Ai, G. Madabattula, D.A. Alvarez, R.Timms, V. Sulzer, J.S. Edge, B. Wu, G.J. Offer, M. Marinescu, Lithium-ion battery degradation: how to model it, Physical Chemistry Chemical Physics, 2022. [arXiv preprint]

7. S. Psaltis, R. Timms, C.P. Please, S.J. Chapman, Homogenisation of spirally-wound high-contrast layered materials, SIAM Journal on Applied Mathematics, 2022. [arXiv preprint]

8. A. Mistry, A. Verma, S. Sripad, R. Ciez, V. Sulzer, F. Brosa Planella, R. Timms, Y. Zhang, R. Kurchin, P. Dechent, W. Li, S. Greenbank, Z. Ahmad, D. Krishnamurthy, A.M. Fenton Jr., K. Tenny, P. Patel, D. Juarez Robles, P. Gasper, A. Colclasure, A. Baskin, C.D. Scown, V.R. Subramanian, E. Khoo, S. Allu, D. Howey, S. DeCaluwe, S.A. Roberts, and V. Viswanathan, A Minimal Information Set To Enable Verifiable Theoretical Battery Research, ACS Energy Letters, 2021.

9. V. Sulzer, S.G. Marquis, R. Timms, M. Robinson,  S.J. Chapman, Python Battery Mathematical Modelling (PyBaMM), Journal of Open Research Software, 2021. [ECSarXiv preprint|code]

10. R. Timms, S.G. Marquis, V. Sulzer, C.P. Please, S.J. Chapman, Asymptotic reduction of a lithium-ion pouch cell model, SIAM Journal on Applied Mathematics, 2021. [arXiv preprint]

11. T.G. Tranter, R. Timms, P.R. Shearing, D.J.L. Brett, Prediction of Thermal Issues for Larger Format 4680 Cylindrical Cells and Their Mitigation with Enhanced Current Collection, Journal of the Electrochemical Society, 2020.

12. S.G. Marquis, R. Timms, V. Sulzer, C.P. Please, S.J. Chapman, A suite of reduced-order models of a single-layer lithium-ion pouch cell, Journal of the Electrochemical Society, 2020. [arXiv preprint|code]

13. T.G. Tranter, R. Timms, T. Heenan, S.G. Marquis, V. Sulzer, A. Jnawali, M.D.R. Kok, C.P. Please, S.J. Chapman, P.R. Shearing, Probing heterogeneity in Li-ion batteries with coupled multiscale models of electrochemistry and thermal transport using tomographic domains, Journal of the Electrochemical Society, 2020.

14. S.G. Marquis, V. Sulzer, R. Timms, C.P. Please, S.J. Chapman, An asymptotic derivation of a single particle model with electrolyte, Journal of the Electrochemical Society, 2020. [arXiv preprint]

15. R. Timms and R. Purvis, A boundary layer analysis for the initiation of reactive shear bands, Proceedings of the Royal Society A, 2019.

16. R. Timms, R. Purvis and J.P. Curtis. A mechanism for hot spot generation in a reactive two-dimensional sheared viscous layer, Combustion Theory and Modelling, 2018.

Conference papers

1. R. Timms, R. Purvis and J.P. Curtis. Shear localisation during deformation of reactive thermo-visco-elastic-plastic materials, in Proceedings of the 3rd Defence and Security Doctoral Symposium, Defence Academy of the United Kingdom, November 2017.

2. R. Timms, R. Purvis and J.P. Curtis. A model to account for the effects of friction during explosive pinch, extended abstract in 26th International Colloquium on the Dynamics of Explosions and Reactive Systems, Boston, Massachusetts, USA, August 2017.

3. R. Timms and R. Purvis. Modelling the effects of temperature-dependent material properties in shear melt layers, in Proceedings of the 2nd Defence and Security Doctoral Symposium, Defence Academy of the United Kingdom, November 2016.

4. R. Timms and R. Purvis. A two-dimensional model for melting and ignition of a thin sheared viscous layer, in Proceedings of the 42nd International Pyrotechnics Society Seminar, Grand Junction, Colorado, USA, July 2016.

Presentations and Posters

1. Talk: Python Battery Mathematical Modelling, University of Waterloo Electrochemical Society (WatECS) Open Source Battery Modelling Workshop, August 2022.

2. Talk: Asymptotic reduction of a mechanical model for jelly roll collapse and damage, Canadian Applied and Industrial Mathematics Society, June 2022.

3. Poster/talk: Reduced-order electrochemical-thermal models of spirally wound cells, Faraday Institution Conference, November 2021. [poster|video (login required)]

4. Invited talk: Multiscale modelling of lithium-ion batteries, Applied mathematics seminar series, University College London, October 2021.

5. Invited talk: Reduced-order 3D models of lithium-ion cells, Battery Modelling Webinar Series, July 2021.

6. Talk: Reduced-order models of spirally-wound cells via homogenization, Canadian Applied and Industrial Mathematics Society, June 2021.

7. Invited talk: Multiscale modelling of lithium-ion batteries, Joint fluids and multiscale modelling seminar series, University of Nottingham, May 2021.

8. Talk: Open-source battery modelling with PyBaMM, Faraday Institution MultiScale Modelling Workshop, April 2021. [video]

9. Talk: Reduced-order modelling at the cell level, Faraday Institution MultiScale Modelling Workshop, April 2021.

10. Talk: Mathematical modelling of spirally wound cells, European Conference on Applied Mathematics, April 2021.

11. Talk: Open-source battery modelling with PyBaMM, Faraday Institution Conference, November 2020. [video]

12. Invited Talk: Asymptotic analysis of shear in energetic materials, Workshop on Mathematical Modelling of Energetic Materials, Edinburgh, December 2019.

13. Talk: An asymptotic approach to the generation of thermal hot spots in electrochemical cells, International Congress on Industrial and Applied Mathematics, Valencia, Spain, July 2019.

14. Talk: Asymptotic Analysis of Small Aspect Ratio Lithium-Ion Batteries, British Applied Mathematics Colloquium, Bath, UK, April 2019

15. Poster: An asymptotic framework for battery modelling,  Oxford Battery Modelling Symposium, Oxford, UK, March 2019.

16. Talk: A boundary layer analysis of reactive shear bands, British Applied Mathematics Colloquium, St. Andrews, Scotland, UK, March 2018.

17. Talk: Mathematical modelling and investigation of explosive pinch, friction and shear problems, Alan Tayler Day, St. Catherine’s College, Oxford, UK, November 2017.

18. Talk and Poster: Shear localisation during deformation of reactive thermo-visco-elastic-plastic materials, 3rd Defence and Security Doctoral Symposium, Swindon, UK, November 2017.

19. Talk: A model to account for the effects of friction during explosive pinch, 26th International Colloquium on the Dynamics of Explosions and Reactive Systems, Boston, Massachusetts, USA, August 2017.

20. Talk: A model for hot spot generation in molten shear layers, APS Conference on Shock Compression of Condensed Matter Early Career Symposium, St. Louis, Missouri, USA, July 2017.

21. Poster: Modelling the effects of temperature-dependent material properties in shear melt layers, Alan Tayler Day, St. Catherine’s College, Oxford, UK, November 2016.

22. Talk: Modelling the effects of temperature-dependent material properties in shear melt layers, 2nd Defence and Security Doctoral Symposium, Defence Academy of the United Kingdom, November 2016.

23. Talk: A two-dimensional model for melting and ignition of a thin sheared viscous layer, 42nd International Pyrotechnics Society Seminar, Grand Junction, Colorado, USA, July 2016.

24. Talk: A two-dimensional model for melting and ignition of a thin sheared viscous layer, Complex Systems with Interfaces, University of East Anglia, Norwich, UK, December 2015.

25. Poster: Melting and ignition of a thin sheared viscous layer, Alan Tayler Day, St. Catherine’s College, Oxford, UK, November 2015.

Study Groups and Workshop Participation

1. 2nd Workshop on Mathematical Modelling of Energetic Materials, May 2021.

2. 1st Workshop on Mathematical Modelling of Energetic Materials, Edinburgh, December 2019.

3. 2nd Energy Systems Study Group with Industry, Edinburgh, UK, December 2018.

4. 12th Workshop on Pyrotechnic Combustion Mechanisms, Grand Junction, Colorado, USA, July 2016.

5. 116th European Study Group with Industry, Durham University, Durham, UK, April 2016.

6. 107th European Study Group with Industry, University of Manchester, Manchester, UK, March 2015.

7. Industrially Focused Mathematical Modelling UK Graduate Modelling Camp, University of Oxford, Oxford, UK, March 2015.