Title:	Simulation of the human vocal folds in the EUNISON FP7 project - unification of work packages
DNr:	SNIC 2015/1-423
Project Type:	SNIC Medium Compute
Principal Investigator:	Sten Ternström <stern@kth.se>
Affiliation:	Kungliga Tekniska högskolan
Duration:	2015-11-30 – 2016-12-01
Classification:	10105 20306
Homepage:	http://eunison.eu/
Keywords:

Abstract

I am coordinator of the EUNISON EU FP7 project (eunison.eu) which aims to simulate human voice generation by solving the unified domain equations for the air flow and elastic deformation in the vocal folds, leading to a turbulent fluid-structure interaction (FSI) with vibrating and contacting vocal folds, generating the base sound of the human voice which is then modulated by the vocal tract and mouth. We are now in the final unification phase of the project where we need to run many large-scale simulations with realistic geometry unifying the models from different work packages: generation of realistic geometry for FSI and acoustics, FSI with acoustics, FSI with muscle control and compressible flow for acoustics. We will make the simulations using our adaptive FEM framework Unicorn/FEniCS-HPC [2] which has shown good results for turbulent flow and FSI problems [1, 2], and also good results for the vocal folds [1]. We have verified optimal strong scaling on both Lingren and Beskow up to ca. 5000 cores with a pure MPI backend using PETSc [2] and up to 12000 cores on Beskow using the experimental hybrid MPI+PGAS JANPACK backend [3]. We will present our results at acoustics and computational mechanics conferences and in journals. [1] J. Jansson, A. Holmberg, R Vilela de Abreu, C. Degirmenci, J. Hoffman, M. Karlsson, M. Åbom "Adaptive parallel finite element framework for simulation of vocal fold turbulent fluid-structure interaction", Proceedings of Meetings on Acoustics (accepted 2013). [2] J. Hoffman, J. Jansson, R. V. de Abreu, N. C. Degirmenci, N. Jansson, K. Muller, M. Nazarov, and J. H. Spuhler. Unicorn: Parallel adaptive finite element simulation of turbulent flow and fluid-structure interaction for deforming domains and complex geometry. Computers & Fluids (2012) [3] N. Jansson. Optimizing Sparse Matrix Assembly in Finite Element Solvers with One-sided Communication. In High Performance Computing for Computational Science - VECPAR 2012, volume 7851 of Lecture Notes in Computer Science , pages 128-139. Springer Berlin Heidelberg, 2013.