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Contours of velocity (m/s) in cross section of channels. (a) Contours of velocity magnitude (m/s) in a cross section of rectangular channel; (b) contours of X-velocity (m/s) in a cross section of rectangular channel; (c) contours of velocity magnitude (m/s) in a cross section of square channel; (d) contours of X-velocity (m/s) in a cross section of square tube channel.
