Towards modelling full contact of Fluid Structure Acoustics Interaction in Human Phonation
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This work summarises our approach towards modelling Fluid-Structure Interaction (FSI) with full contact to realistically calculate the phenomena in human phonation as an extension of the digital twin “simVoice”. Regarding the recent state-of-the-art analysis in [1], the complex coupling between airflow, vocal fold dynamics with contact, and sound generation is the next big step for more physical models. We develop a coupled numerical framework that integrates the governing equations of incompressible fluid flow, structural dynamics of the vocal folds, and acoustic wave propagation. This approach models contact interactions between the opposing vocal folds, allowing self-synchronization. The flow is modelled by large eddy simulation and finite element methods for structural analysis; we accurately capture the dynamic behaviour of the vocal folds and their interaction with the airflow, leading to realistic predictions of the aerodynamic forces, vibration modes, and radiated sound (validated by the data in [2]). The results provide insights into the mechanisms of voice production, including the role of vocal fold contact and the subsequent impact on the acoustics of the human voice.