He is a research and development engineer in the Experiment Analysis Group of Nuclear Science and Technology at Idaho National Laboratory. In his present position, he leads in-pile instrumentation development for transient irradiation testing and is a principal investigator for transient testing of metallic fuels. He is an experiment safety and performance analyst for experiments at the Advanced Test Reactor and the Transient Reactor Test Facility. In addition, he is a technical lead for measurement of thermophysical properties of nuclear materials. He has expertise in energy transport in condensed matter, liquids, gases, and material interfaces. He has significant experience in advanced measurements of thermophysical properties of nuclear materials using multi-scaled approaches, including nano-scale measurements using atomic force microscopy, laser-based microscopic photothermal methods, and bench-scale high temperature thermal conductivity techniques. He also has expertise in numerical and commercial finite element analysis. He holds bachelor’s and master’s degrees from Utah State University and a joint doctorate from Utah State University and Universite de Reims Champagne-Ardenne. He is a member of American Nuclear Society (ANS) and American Society of Mechanical Engineers. He was the founding president of the ANS Student Chapter at Utah State University and currently serves as an Executive Committee member for the Material Science and Technology Division of ANS.
He is a staff scientist and facility director at Lawrence Berkeley National Laboratory’s Molecular Foundry leading research in thermoelectrics and hydrogen storage. His research focuses on the materials and physics of mass, heat, and charge transport in complex hybrid nanomaterials. His expertise is developing new materials and measurement tools for solid-state energy storage and conversion applications; investigating transport at the organic-inorganic interface; and identifying energy efficient desalination methods.
He is responsible for the development of science-based simulations for use in accelerating energy technology development. He was architect of the widely used, open-source multiphase CFD code, known as Multiphase Flow with Interphase eXchanges (MFIX), and led the development of software for linking process- and device-scale simulations and the C3M chemical kinetics software. As a fellow of the American Academy of Chemical Engineers, he specializes in multiphase flow, computational fluid dynamics (CFD), fluidization, and various energy processes. He is a founding technical director of National Energy Technology Laboratory’s Carbon Capture Simulation Initiative (CCSI). He has received numerous awards, such as the Energy Secretary’s Achievement Honor Award and American Institute of Chemical Engineers (AIChE) Fluidization Process Recognition Award. His many publications address topics, such as gasifier advanced simulation models; multiphase hydrodynamics of gas-solids flow; modeling coal gasification processes; hydrodynamics of particle segregation in fluidized beds; and simulation of granular layer inversion in liquid fluidized beds. He has a bachelor’s in chemical engineering from the Indian Institute of Technology (BHU) Varanasi, and a master’s and doctorate from the Illinois Institute of Technology in Chicago.
He is a research scientist from Idaho National Laboratory (INL) with extensive experience in the fields of materials electrochemistry as applied to reactive and refractory metals, process metallurgy, synthesis and characterization of high-temperature metals and materials, energy-efficient manufacturing processes, and materials recycling. While working at Bhabha Atomic Research Center, India, he developed an entirely new (molten salt based) process flow-sheet for the production of vanadium metal with a view to fabricate a self-powered beta detector. He also worked on the development of a new high-temperature process for the production of commercial-grade zirconia and silica powders from the indigenously available zircon mineral. His other projects have been aimed at recovering valuable materials from waste, secondary resources, and lean ore bodies. His team could successfully develop a technology for the conversion of Zr-2.5Nb alloy scrap to high purity zirconium crystal bar by van Arkel de Boer process. This technology can be adopted to successfully transform the alloy scrap into high purity zirconium crystal bar, a metal of significant importance to the nuclear energy program. At the University of Cambridge, he worked on the process optimization studies pertaining to the preparation of titanium metal and its alloys by a novel molten salt electrochemical process. He developed a preparative process for titanium-lanthanum alloy from their mixed oxides. At the Massachusetts Institute of Technology, he worked on a high-temperature electrochemical process to generate oxygen from the lunar regolith. This is one of the two technologies shortlisted by NASA for its eventual deployment to produce breathable oxygen from in situ (lunar) resources. At INL, the scientific underpinning of his research activities has been to study the behavior of metals and materials under a given set of conditions. His diverse research pursuits include materials electrochemistry, energy-efficient manufacturing processes, and materials recycling.
He is a research scientist specializing in crosscutting applications and advancement of sensor research to enable resilient real-time measurement and control of process variables within the nuclear and other critical industries. His research expertise includes applications of pattern recognition and machine learning techniques, instrumentation and controls, data analytics, battery modeling, risk and reliability, digital signal processing, acoustic telemetry, diagnosis/prognosis using wavelets and empirical mode decomposition, time series analysis, power management, wireless communication protocols, and wireless sensor networks. He has authored 51 peer-reviewed publications and one book chapter, and two U.S. patent applications filed. To date, he was involved in 13 research projects and has been the principal investigator for eight. He serves as a reviewer for the Institute of Electrical and Electronics Engineers (IEEE) Transactions on Image Processing, Energy Conversion, Industrial Informatics, Industrial Applications, Power Delivery, Systems, Machine and Cybernetics, Instrumentation and Measurement, and the American Nuclear Society (ANS) Transactions on Nuclear Technology. He serves as an external reviewer for U.S. Department of Energy’s Office of Science and Office of Nuclear Energy. Since 2009, he has been section editor for the Journal of Pattern Recognition Research. Since 2015, he has served as an elected member of the ANS Human Factors, Instrumentation, and Controls Division and the American Society of Mechanical Engineers Nondestructive Prognostics and Diagnostic Division since 2016.
He studies microscopic and macroscopic properties of complex and nano-structured materials with a view to basic science understanding and developing their application in energy related technologies. His current research ranges from basic physics and material science studies to the applications of superconducting materials and thermoelectrics. His fundamental science work has seen practical application in the superconducting wires and switches being developed for use in the electricity transmission, grid protection, and in thermoelectric power generators now being developed for vehicle waste heat recovery. He is an elected fellow of American Physical Society. He received his doctorate in physics from Iowa State University.
His research spans computational and experimental materials science across fields, including solar energy, energy storage, and energy conversion. Much work has focused on the electronic, optical, and optoelectronic properties of semiconductors and nanostructures, emphasizing the relationships among defects, electronic structure, surface/interface effects, and device performance with a theme of enabling materials by design. He employs advanced predictive materials modeling methods in conjunction with advanced synthesis and characterization techniques. At Lawrence Livermore National Laboratory (LLNL), he leads a team of about a dozen computational materials scientists as the deputy group leader of the Quantum Simulations Group and oversees collaborations with experimental groups both internal and external to LLNL. He was a LLNL fellow and Scowcroft National Security fellow at LLNL, and a Hertz Fellow at Stanford where he received his doctorate. He was recently elected a young leader of The Minerals, Metals and Materials Society (TMS).
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