See https://news.mit.edu/2013/when-fluid-dynamics-mimic-quantum-... https://news.mit.edu/2014/fluid-systems-quantum-mechanics-09... and https://en.wikipedia.org/wiki/Hydrodynamic_quantum_analogs My favorite is the images in https://thales.mit.edu/bush/wp-content/uploads/2021/04/Bush-... of their experimental setup; more details in Harris's thesis: https://dspace.mit.edu/handle/1721.1/99068