trevor@trevorkeller.com
Scientist and Sysadmin thriving at the intersection of mathematical models, high-performance computing, and data storage. Specializing in Linux clusters and solid-state microstructure evolution in metals. Passionate about building a better tomorrow.
Maintained 70-node HPC cluster and data storage; improved research reproducibility by centralizing software builds; alleviated filesystem resource contention through workflow analysis and user education. Orchestrated democratic elections for High Performance Computing Carpentry, leading to incubation as a Carpentries Lesson Program.
Implemented phase-field model for solid-state transformation in alloy systems with three components and four phases, analogous to Inconel 625, to simulate microstructure evolution during heat treatment of additively manufactured parts. Produced thermodynamic models through simplification of quantitative CALPHAD databases while retaining key phase diagram features, using computer algebra systems to accurately generate expressions and multivariable derivatives.
Achieved 72× scaleup in CdS deposition area with only 6× increase in waste generation. Researched alternatives to chemical bath deposition of CdS thin films, including nontoxic materials and novel reactor geometries. Traveled to Helsinki, Finland, to evaluate an atomic layer deposition reactor and reported back to senior management.
Thesis: "Bias in Polycrystal Topology Caused by Grain Boundary Motion by Mean Curvature"
Performed large-scale phase field simulations of normal isotropic grain growth on high performance computing clusters including AMOS, an IBM Blue Gene/Q supercomputer. Designed and implemented algorithms to reconstruct polyhedral grain topology (faces, edges, and vertices) from diffuse interfaces in 2D and 3D phase field datasets. Found the process of triangular face elimination responsible for biasing topology in populations of polyhedral grains in synthetic, simulated, and real metal microstructures.
Thesis: "Effects of Magnesium(II) on Zinc Oxide Nanorod Growth From Aqueous Solution"
Designed experiments to deposit ZnO on glass substrates using a novel flow-through aqueous chemical reactor. Found minor effects of Mg2+ ions on ZnO film stress and lattice parameters.
A. Reid, A. O'Cais, T. Keller, W. Purwanto, and A. Alim Rasel. "HPC Carpentry: A scalable, peer-reviewed training program to democratize HPC access." Journal of Computational Science Education 15 (2024) 32—34. DOI: 10.22369/issn.2153-4136/15/1/6.
D. Wheeler, T. Keller, S. DeWitt, A. Jokisaari, D. Schwen, J. Guyer, L. Aagesen, O. Heinonen, M. Tonks, P. Voorhees, and J. Warren. "PFHub: The Phase-Field Community Hub. " Journal of Open Research Software 7 (2019) 29. DOI: 10.5334/jors.276.
T. Keller, G. Lindwall, S. Ghosh, L. Ma, B. Lane, F. Zhang, U. Kattner, J. Heigel, E. Lass, Y. Idell, M. Williams, A. Allen, J. Guyer, and L. Levine. "Application of finite element, phase-field, and CALPHAD-based methods to additive manufacturing of Ni alloys. " Acta Materialia 139 (2017) 244—253. DOI: 10.1016/j.actamat.2017.05.003.
T. Keller, B. Cutler, E. Lazar, and D. Lewis. "Comparative grain topology. " Acta Materialia 66 (2014) 414—423. DOI: 10.1016/j.actamat.2013.11.039.
T. Keller, B. Cutler, M. Glicksman, and D. Lewis. "Enumeration of polyhedra for grain growth analysis. " In Proceedings of the First International Conference on 3D Materials Science (Seven Springs, PA: 2012) 97—106. DOI: 10.1007/978-3-319-48762-5_15.
"The group is recognized for leading a stakeholder community to establish benchmarks for evaluating and validating phase field simulation software useful to the design and manufacture of advanced materials. The group convened and led 10 workshops since 2015 to establish eight distinct benchmark challenges, and to determine stakeholder needs for a benchmark repository and database. The resulting digital infrastructure that the group built, PFHub, is used by scientists worldwide and is broadly recognized as the world’s authoritative resource for validating phase field simulation software and results."
"For exceptional contribution to the field of metal additive manufacturing with a focus on developing integrated simulation methods to predict microstructure evolution based on phase-field models, computational thermodynamics, and finite element analysis."
*Presenter's name is underlined.
*Presenter's name is underlined.