Flow-accelerated corrosion (FAC) causes wall thinning of carbon steel pipes in nuclear power plants. As one of the controlling elements in the process of FAC, the turbulent mass transfer from wall to bulk flow demands to be understood. In order to estimate the FAC rate, the mass transfer coefficient is an indispensible parameter. In the present paper, with the aid of CFD, the authors investigate the mass transfer coefficient in the flow through an orifice. Instead of the low Reynolds number two-equation eddy-viscosity model used in our previous study, the high Reynolds number models with the aid of wall functions are used here to model the mass transfer.
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