Faculty Directory
Gregory J. Wagner

Associate Professor of Mechanical Engineering

Bette and Neison Harris Chair in Teaching Excellence

Director of Graduate Studies for Mechanical Engineering

Contact

2145 Sheridan Road, L492
Tech
Evanston, IL 60208-3109

847-491-4138Email Gregory Wagner

Website

Wagner Research Group


Departments

Mechanical Engineering

Affiliations

Theoretical and Applied Mechanics Graduate Program


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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

    1.    J. Fish, G. J. Wagner, S. Keten. “Mesoscopic and multiscale modelling in materials.” Nature Materials, 20(6):774-786. 2021.

    2.    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.

    3.    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.

    4.    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.

    5.    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.

    6.    Y. Lian, J. Dallmann, B. Sonin, K. Roche, W.K. Liu, A. I. Packman, G. J. Wagner. “Large eddy simulation of turbulent flow over and through a permeable bed.” Computers and Fluids, 180:128-138. 2019.

    7.    J. Yan, W. Yan, S. Lin, G.J. Wagner. “A fully coupled finite element formulation for liquid-solid-gas thermo-fluid flow with melting and solidification.” Comput. Methods Appl. Mech. Engrg., 336: 444-470, 2018.

    8.    Y. Lian, S. Lin, W. Yan, W.K. Liu, G.J. Wagner. “A parallelized three-dimensional cellular automaton model for grain growth during additive manufacturing.” Comput. Mech., 61(5):543-558, 2018.