fig8

Figure 8. Effects of different flow channel structures on water electrolysis^[69,81,82]. Straight-type flow channel. (A) computational domain and mesh configuration of a zero-gap AWE cell; (B) and (C) contours of H₂/O₂ molar concentration over the plane cutting across the centerat at v_in = 0.1 m/s. These figures are quoted with permission from Lee et al.^[69]. Ring cross-type flow channel: (D) three-dimensional structure of the electrolyzer cell; (E) distribution of hydrogen and oxygen in the flow channel of anode and cathode; (F) the uneven distribution of current densities of the catalyst due to the bubble effect (E_cell = 2.1 V). These figures are quoted with permission from Huang et al.^[81]. Single serpentine flow channel: (G) geometry and boundary conditions of the computational domain; the flow state around square (H) and rounded (I) bends. These figures are quoted with permission from Wong et al.^[82]. AWE: Alkaline water electrolyzer.