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Consider a system where the mean velocity of fluid in a wide microchannel of depth 100 micrometers is 1 mm/s. Determine the peclet number for

Consider a system where the mean velocity of fluid in a wide microchannel of depth 100 micrometers is 1 mm/s. Determine the peclet number for a trace in this flow, assuming the trace diffusivity is 10^-11 m^2/s. Is the tracer motion dominated by convection or diffusion?

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