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مکانیک::
ضریب انتشار (نفوذ)
Since the temperature diffusivity is on the order of 10 ' cirr /s, the diffusion coefficient of a solvent is on the order of 10 ~ enr/ s, the cooperative diffusion coefficient of polymer chains is on the order of If) 1 cnr~ /s, and the swelling dynamics are determined by the later coefficient.
where c is the species concentration and the diffusion coefficient could be expressed
Diffusion Coefficients in Water efc 25*C [4]
are the concentration of the solute, the diffusion coefficient, and the velocity
At a constant diffusion coefficient D and a constant Sow velocity w, a small Peclet number can be achieved by decreasing the mixing path W , Figure 10,3(a ) depicts the typical dimensionless concentration distribution for two streams with a mixing ratio of 1 : 1 ,
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