Vortex Dynamics Simulation of the collision between two vortex tubes with initial axial flowSimulation of the collision between two vortex tubes.Simulation of the collision between two vortex ringsSimulation of the collision between two vortex rings Biolocomotion Numerical simulation of a C-startSimulation of self-propelled undulatory swimmerSimulation of self-propelled undulatory swimmer with shape optimized for speedNumerical simulation of four self-propelled swimmers Shape-shifting Simulation of the growth of a snapdragon flower petal out of a cylindrical elastic bilayer sheetSimulation of the growth of a face out of a flat elastic bilayer sheetSimulation of the growth of a canyon out of a flat elastic bilayer sheet