Faculty DirectoryGregory J. Wagner
Associate Professor of Mechanical Engineering
Director of Graduate Studies for Mechanical Engineering
Contact
2145 Sheridan Road, L492Tech
Evanston, IL 60208-3109
847-491-4138Email Gregory Wagner
Website
Departments
Affiliations
Theoretical and Applied Mechanics Graduate Program
Education
Ph.D. Mechanical Engineering, Northwestern University, Evanston, IL
M.S. Mechanical Engineering, Northwestern University, Evanston, IL
B.S. Mechanical Engineering, Boston University, Boston, MA
Research Interests
I am interested in the development and application of computational simulations methods for multi-scale and multi-physics problems in engineering, especially in the areas of fluid dynamics, heat transfer, and material transport. Many of the most fascinating engineering systems are characterized by two or more physical phenomena coupled together in a single domain or across an interface. My research is focused on the development of models for these of these types of problems, and their solution using high performance computing tools. Examples include melting and solidification of metal in advanced manufacturing processes, fluid-structure interaction in the human heart and vascular system, heat transfer in multi-phase flows, and multi-scale transport in environmental systems.
Selected Publications
A. Samaei, C. Porter, D. Kozjek, J.-E. Mogonye, J. Cao, G. J. Wagner. “Understanding coaxial photodiode-based multispectral pyrometer measurements at the overhang regions in laser powder bed fusion for part qualification.” Additive Manufacturing, 93:1044398. 2024.
J. Leonor, G. J. Wagner. “GO-MELT: GPU-Optimized Multilevel Execution of LPBF Thermal simulations.” Comp. Meth. Appl. Mech. Eng., 426:116977. 2024.
Z. Sang, A. Samaei, G. J. Wagner. “Phase change and solute mixing in multicomponent metal additive manufacturing: a new numerical approach.” Comp. Meth. Appl. Mech. Eng., 420:116754. 2024.
A. Samaei, Z. Sang, J. A. Glerum, J. E. Mogonye, G. J. Wagner. “Multiphysics modeling of mixing and material transport in additive manufacturing with multicomponent powder beds.” Additive Manufacturing, 67: 03481. 2023.
L. Fang, L. Cheng, J. Glerum, J. Bennett, J. Cao, G. J. Wagner. “Data-driven analysis of thermal simulations, microstructure, and mechanical properties of Inconel 718 thin walls deposited by metal additive manufacturing.” npj Computational Materials, 8:126. 2022.
J. Fish, G. J. Wagner, S. Keten. “Mesoscopic and multiscale modelling in materials.” Nature Materials, 20(6):774-786. 2021.
L. Cheng, G. J. Wagner. “An optimally-coupled multi-time stepping method for transient heat conduction simulation for additive manufacturing.” Comput. Methods Appl. Mech. Engrg., Comput. Methods Appl. Mech. Engrg., 381:113825, 2021.
S. Lin, Z. Gan, J. Yan, G. J. Wagner. “A conservative level set method on unstructured meshes for modeling multiphase thermo-fluid flow in additive manufacturing processes.” Comput. Methods Appl. Mech. Engrg., 372:113348, 2020.
Z. Gan, Y. Lian, S. E. Lin, K. K. Jones, W. K. Liu, G. J. Wagner. “Benchmark study of thermal behavior, surface topography and dendritic microstructure in laser melting of Inconel 625.” Integrating Materials and Manufacturing Innovation, 8:178-193, 2019.
Y. Lian, Z. Gan, C. Yu, D. Kats, W. K. Liu, G. J. Wagner. “A cellular automaton finite volume method for microstructure evolution during additive manufacturing.” Materials & Design, 169:107672. 2019.
Gregory Wagner In the News
Wagner Named Bette and Neison Harris Chair in Teaching Excellence
Four Professors Included in Special Nature Materials Thematic Issue