Bucelli, MicheleGabriel, Martin GeraintQuarteroni, AlfioGigante, GiacomoVergara, Christian2023-08-282023-08-282023-08-282023-07-0510.1016/j.jcp.2023.112326https://infoscience.epfl.ch/handle/20.500.14299/200159WOS:001041151700001We present a loosely coupled scheme for the numerical simulation of the cardiac electrofluid-structure interaction problem, whose solution is typically computationally intensive due to the need to suitably treat the coupling of the different submodels. Our scheme relies on a segregated treatment of the subproblems, in particular on an explicit Robin-Neumann algorithm for the fluid-structure interaction, aiming at reducing the computational burden of numerical simulations. The results, both in an ideal and a realistic cardiac setting, show that the proposed scheme is stable at the regimes typical of cardiac simulations. From a comparison with a scheme with implicit fluid-structure interaction, it emerges that, while conservation properties are not fully preserved, computational times significantly benefit from the explicit scheme. Overall, the explicit discretization represents a good trade-off between accuracy and cost, and is a valuable alternative to implicit schemes for fast largescale simulations. & COPY; 2023 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons .org /licenses /by-nc -nd /4 .0/).Computer Science, Interdisciplinary ApplicationsPhysics, MathematicalComputer SciencePhysicscardiac modelingmultiphysicselectromechanicsfluid-structure interactionrobin-neumann interface conditionspartitioned fsi algorithmnavier-stokes equationsincompressible-flowmultigrid solverleft-heartsimulationmasselectromechanicselectrophysiologyactivationtext::journal::journal article::research article