aluminum aqueous solution with desiccant cavitator chloride melts circulation circuit condensation method critical speed cycling disk pulse device downflow electrical energy electrochromism electrodeposition energy efficiency gas content geometric dimensions heat generator design holmium jet injection apparatus kinetic parameters layered double hydroxide linseed oil mathematical model nickel hydroxide optimization phase contact surface polyvinyl alcohol rotor terbium thermal energy translational and rotational flow tungstate voltammetry vortex heat generator wood impregnation wood modification working chamber geometry