  Background and objective: Contrary to flows in small intracranial vessels,
many blood flow configurations such as those found in aortic vessels and
aneurysms involve larger Reynolds numbers and, therefore, transitional or
turbulent conditions. Dealing with such systems require both robust and
efficient numerical methods. Methods: We assess here the performance of a
lattice Boltzmann solver with full Hermite expansion of the equilibrium and
central Hermite moments collision operator at higher Reynolds numbers,
especially for under-resolved simulations. To that end the food and drug
administration's benchmark nozzle is considered at three different Reynolds
numbers covering all regimes: 1) laminar at a Reynolds number of 500, 2)
transitional at a Reynolds number of $3500$, and 3) low-level turbulence at a
Reynolds number of 6500. Results: The lattice Boltzmann results are compared
with previously published inter-laboratory experimental data obtained by
particle image velocimetry. Our results show good agreement with the
experimental measurements throughout the nozzle, demonstrating the good
performance of the solver even in under-resolved simulations. Conclusion: In
this manner, fast but sufficiently accurate numerical predictions can be
achieved for flow configurations of practical interest regarding medical
applications.
