An improved theoretical model was developed to predict the mass transfer controlled corrosion/precipitation in nonisothermal LBE pipe systems. In this mass transfer model, a turbulent core region and a laminar sub-layer region have been considered separately in the total mass transfer to the transferring corrosion product from the wall of the pipe. Two sets of mass transfer equations have been solved respectively both in the turbulent core region and sub-layer region. Following the model development, both of the local corrosion/precipitation rate and bulk concentration were calculated and a theoretic study has been made to illustrate the effects of the axial temperature profile on the corrosion/precipitation rate and buck concentration by applying present model to DELTA loop in Los Alamos National Laboratory. Numerical simulations were preceded in the open pipe systems and the results were analyzed. The solutions obtained also can be extended to the more general problems of high Schmidt mass transfer in the developed turbulent wall-bounded shear flows.

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