2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/111832We present theoretical and numerical evidence to show that self-defocusing nonlinear optical propagation can be used to compute Euler fluid dynamics and possibly Navier-Stokes fluid dynamics. In particular, the formation of twin vortices and the Kármán vortex street behind an obstacle, two well-known viscous fluid phenomena, is numerically demonstrated using the nonlinear Schrödinger equation.12 pages, 17 figuresOpticsFluid Dynamicstext