The fiber reorientation law is based on Kroon’s1 paper, but we wanted to investigate using a different stimulus. The end goal is to have a rerientation law that occurs at each timestep of the cardiac cycle. For the vector f0 representing the reference fiber direction, the generic differential equation is
where Θ represents the tensor that is the stimulus for remodeling. Preliminary simulations have investigated using the passive stress tensor, total stress tensor, and Green-Lagrangian strain tensor.
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Kroon W, Delhaas T, Bovendeerd P, Arts T (2009b) Computational analysis of the myocardial structure: adaptation of cardiac myofiber orientations through deformation. Med Image Anal 13:346–353. https://doi.org/10.1016/j.media.2008.06.015 ↩