先进材料疑固实验室 Situation 3:No diffusion in the solid,normal Laboratory of Advanced Materials Solidification diffusion in the liquid,no convection. To maintain the overall mass balance,Cs*must be equal to Co in the steady state. In the steady state,the concentration differential equation -D股 aCL t can be changed into: n器+ dCy二0 R growth rate x'=the distance of the point of interest from the solid/liquid interface D=diffusion coefficient of solute atom in the liquid. 上浒充通大 SHANGHAI JIAO TONG UNIVERSITYTo maintain the overall mass balance, CS* must be equal to C0 in the steady state. In the steady state, the concentration differential equation can be changed into: Situation 3: No diffusion in the solid, normal diffusion in the liquid, no convection. R = growth rate x’= the distance of the point of interest from the solid/liquid interface DL = diffusion coefficient of solute atom in the liquid