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The size of eddy is proportional to the streamline flow.(a) True(b) FalseThis question was posed to me in quiz.I would like to ask this question from Role of Diffusion in Bioprocessing in section Mass Transfer of Bioprocess Engineering

Answer»

The correct option is (b) False

Easy explanation: Turbulence in FLUIDS produces bulk mixing on a scale equal to the smallest eddy size. Within the smallest eddies, flow is LARGELY streamline so that further mixing must occur by DIFFUSION of fluid components. Mixing on a MOLECULAR scale therefore relies on diffusion as the final step in the mixing process.



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