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Average velocity amplitude at different channel aspect ratios (a) AR = 1/2, (b) AR = 1/3, (c) AR = 1/4, and (d) AR = 1/5. Inset shows Hv value of each data point. Conditions: voltage amplitude = 10 V, conductivity difference = 10% (γ = 1.1), electrode width = 40 μm, and electrode gap = 20 μm.
