06. Transport phenomena in solid mechanics and fluid-structure

This research proposes the application of a near-infrared (NIR) microscopy imaging system for in-situ envisioning the electrolyte flow fields and concentration distribution within the growth of dendrites. The approach was based on the concentration dependence of the absorption coefficient of zinc aqueous solution at the wavelength of 1579 nm. Experimentally, a micro-reactor cell with a 1 mm optical pathlength filled with a zinc aqueous solution exposing a 5.5 mm² working electrode to the electrolyte. The electrodeposition was carried out under inconsistency of overpotential applied at the surface of the working electrode. As a result, the inhomogeneous concentration distribution generated a tremendous parabolic growth dropping in concentrated around the working electrode, along with an asymmetrical of advection micro-buoyant flow skipped generated from edges and merging into a single flow. The single upward flow shows a natural convective flow under Lorentz characteristics produced and visibility of dendrite with a crystalline growth direction at 1120.