Dr. Tim Wegmann

RWTH Aachen University, Chair for Fluid Mechanics and Aerodynamics Institute

Contact

RWTH Aachen University

Chair of Fluid Mechanics and Institute of Aerodynamics (AIA)

Wüllnerstraße 5a

52062 Aachen

fluids@nhr4ces.de
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Biography

Tim holds Bachelor’s and Master’s degrees in Aerospace Engineering from the University of Stuttgart, Germany. In 2018, he joined the Institute of Aerodynamics at RWTH Aachen University as a research scientist. He received his PhD in Engineering with a focus on high-performance computing of multiphase flows as part of the Excellence Cluster Fuel Science Center. He is currently a postdoctoral researcher, continuing his work on spray injection of bio-hybrid fuels in internal combustion engines.

Thematic Advice

Multiphase flow in internal combustion engines represents one of the most challenging applications in computational fluid dynamics. The compressible, unsteady, and turbulent flow is bounded by moving pistons and valves and interacts with dispersed fuel spray droplets. Accurately capturing these processes requires complex physical and numerical models to describe fuel evaporation and phase transition, as well as dynamic mesh topology changes arising from valve opening and closing.

The multiphysics solver m-AIA, developed at the Institute of Aerodynamics, provides a numerical framework for highly resolved simulations on high-performance computing systems. It incorporates multiple solution schemes—including Discontinuous Galerkin, Lattice Boltzmann, and Finite Volume methods—which can be combined to address coupled multiphysics problems such as conjugate heat transfer and fluid–structure interaction.

Professional Competence

Tim’s research focuses on the representation of embedded moving boundaries using a multiple level-set and cut-cell methods on hierarchical Cartesian grids. His expertise includes the development of efficient coupling schemes for multiphase flow simulations, such as Eulerian–Lagrangian volume coupling. In addition, he develops Lagrangian particle models for the simulation of spray injection processes.