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Novel Simulation Techniques for Deforming-Domain Problems

Marek Behr, RWTH-Aachen

Stefani Elgeti, Vienna University of Technology

The mini-symposium will focus on computational methods and flow simulations that involve deforming domains, and in particular, fluid-structure, fluid-object, and solid-solid interaction, as well as fluid-air and melt-solid interfaces. Both major mesh-based approaches, that of interface-tracking and interface-capturing, will be represented. An interface-tracking method places computational nodes at the moving interface and adjusts the computational mesh to the movement of those nodes. An interface-capturing method allows the computational mesh to be stationary, and records which computational cells, or elements, are filled with fluid, empty, or contain the interface.
The challenges associated with interface-tracking methods include: robust interface-tracking methodology, general algorithms for displacing the nodes at the interface, compatibility of fluid and structural representation, and adjustment of the computational mesh away from the interface.
The interface-capturing methods will benefit from: improved accuracy of the predicted position of the interface, control over mass conservation errors, representation of interfacial phenomena such as surface tension, and adaptive refinement at the interface.
Our goal is to provide a forum for exchange of ideas, latest developments, and comparison of various methods, as well as discussion of applications of these methods. Emerging general approaches relevant to the abovementioned engineering problems are especially welcome, including space-time meshing, model-order reduction, uncertainty quantification, hybrid modeling, and data- driven techniques.