[EN] Isogeometric Analysis (IgA) can be seen as the natural extension of the Finite
Element Method (FEM) to high-order B-spline basis functions. Combined with a time integration scheme within the method of lines, IgA has become a viable alternative to FEM for
time-dependent problems. However, as processors’ clock speeds are no longer increasing but
the number of cores are going up, traditional (i.e., sequential) time integration schemes become
more and more the bottleneck within these large-scale computations. The Multigrid Reduced
in Time (MGRIT) method is a parallel-in-time integration method that enables exploitation
of parallelism not only in space but also in the temporal direction. In this paper, we apply
MGRIT to discretizations arising from IgA for the first time in the literature. In particular,
we investigate the (parallel) performance of MGRIT in this context for a variety of geometries,
MGRIT hierarchies and time integration schemes. Numerical results show that the MGRIT
method converges independent of the mesh width, spline degree of the B-spline basis functions
and time step size ∆t and is highly parallelizable when applied in the context of IgA.
