Recent ship hydrodynamics developments in the parallel two-fluid flow solver Alya. CFD modeling of turbulent free surface flows has become an important tool in the design of ship hulls. A two-fluid flow solver that can predict the flow pattern, free surface shape and the forces on the ship hull is presented. The discretization is based on unstructured linear finite elements, tetrahedras and prisms. A Variational Multiscale Stabilization technique known as Algebraic Sub Grid Scale Stabilization (ASGS) is used to deal with convection dominated flows and allow for equal order velocity-pressure interpolations. A fixed grid method that captures the position of the interface with the Level Set technique is used to simulate the two-phase flow. The jump in the fluid properties is smoothed in a region close to the interface. Spalart Allmaras and SST $k$-${omega}$ turbulence models have been tested without showing significant differences. The need to accurately predict the viscous forces on the ship hull has motivated the use of anisotropically refined prism elements close the hull. Such meshes have challenged the capabilities of the equation based reinitialization techniques that we had previously used for the Level Set method.

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  1. Regazzoni, F.; Salvador, M.; Africa, P. C.; Fedele, M.; Dedè, L.; Quarteroni, A.: A cardiac electromechanical model coupled with a lumped-parameter model for closed-loop blood circulation (2022)
  2. Thari, A.; Staufer, M.; Page, G. J.: Asynchronous task based Eulerian-Lagrangian parallel solver for combustion applications (2022)
  3. D’Ambra, Pasqua; Durastante, Fabio; Filippone, Salvatore: AMG preconditioners for linear solvers towards extreme scale (2021)
  4. Thari, A.; Treleaven, N. C. W.; Staufer, M.; Page, G. J.: Parallel load-balancing for combustion with spray for large-scale simulation (2021)
  5. Cortes, Adriano M. A.; Lins, Erb F.; Guerra, Gabriel M.; Silva, Rômulo M.; Alves, José L. D.; Elias, Renato N.; Rochinha, Fernando A.; Coutinho, Alvaro L. G. A.: EdgeCFD: a parallel residual-based variational multiscale code for multiphysics (2020)
  6. Garcia-Gasulla, Marta; Banchelli, Fabio; Peiro, Kilian; Ramirez-Gargallo, Guillem; Houzeaux, Guillaume; Ben Hassan Saïdi, Ismaïl; Tenaud, Christian; Spisso, Ivan; Mantovani, Filippo: A generic performance analysis technique applied to different CFD methods for HPC (2020)
  7. Levrero-Florencio, F.; Margara, F.; Zacur, E.; Bueno-Orovio, A.; Wang, Z. J.; Santiago, A.; Aguado-Sierra, J.; Houzeaux, G.; Grau, V.; Kay, D.; Vázquez, M.; Ruiz-Baier, R.; Rodriguez, B.: Sensitivity analysis of a strongly-coupled human-based electromechanical cardiac model: effect of mechanical parameters on physiologically relevant biomarkers (2020)
  8. Lintermann, Andreas; Meinke, Matthias; Schröder, Wolfgang: Zonal flow solver (ZFS): a highly efficient multi-physics simulation framework (2020)
  9. Quintanas-Corominas, A.; Turon, A.; Reinoso, J.; Casoni, E.; Paggi, M.; Mayugo, J. A.: A phase field approach enhanced with a cohesive zone model for modeling delamination induced by matrix cracking (2020)
  10. Garcia-Gasulla, Marta; Houzeaux, Guillaume; Ferrer, Roger; Artigues, Antoni; López, Victor; Labarta, Jesús; Vázquez, Mariano: MPI+X: task-based parallelisation and dynamic load balance of finite element assembly (2019)
  11. Abdullahi, Ambra; D’Ambra, Pasqua; Di Serafino, Daniela; Filippone, Salvatore: Parallel aggregation based on compatible weighted matching for AMG (2018)
  12. Abide, Stéphane; Viazzo, Stéphane; Raspo, Isabelle; Randriamampianina, Anthony: Higher-order compact scheme for high-performance computing of stratified rotating flows (2018)
  13. Borrell, R.; Cajas, J. C.; Mira, D.; Taha, A.; Koric, S.; Vázquez, M.; Houzeaux, G.: Parallel mesh partitioning based on space filling curves (2018)
  14. Cajas, J. C.; Houzeaux, G.; Vázquez, M.; García, M.; Casoni, E.; Calmet, H.; Artigues, A.; Borrell, R.; Lehmkuhl, O.; Pastrana, D.; Yáñez, D. J.; Pons, R.; Martorell, J.: Fluid-structure interaction based on HPC multicode coupling (2018)
  15. Farcas, Ionut-Gabriel; Uekermann, Benjamin; Neckel, Tobias; Bungartz, Hans-Joachim: Nonintrusive uncertainty analysis of fluid-structure interaction with spatially adaptive sparse grids and polynomial chaos expansion (2018)
  16. Gorobets, A.: Parallel algorithm of the NOISEtte code for CFD and CAA simulations (2018)
  17. Pastrana, D.; Cajas, J. C.; Lehmkuhl, O.; Rodríguez, I.; Houzeaux, G.: Large-eddy simulations of the vortex-induced vibration of a low mass ratio two-degree-of-freedom circular cylinder at subcritical Reynolds numbers (2018)
  18. Houzeaux, Guillaume; Cajas, J. C.; Discacciati, M.; Eguzkitza, B.; Gargallo-Peiró, A.; Rivero, M.; Vázquez, M.: Domain decomposition methods for domain composition purpose: chimera, overset, gluing and sliding mesh methods (2017)
  19. Quarteroni, Alfio; Lassila, Toni; Rossi, Simone; Ruiz-Baier, Ricardo: Integrated heart -- coupling multiscale and multiphysics models for the simulation of the cardiac function (2017)
  20. Bungartz, Hans-Joachim; Lindner, Florian; Gatzhammer, Bernhard; Mehl, Miriam; Scheufele, Klaudius; Shukaev, Alexander; Uekermann, Benjamin: preCICE -- a fully parallel library for multi-physics surface coupling (2016)

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