What is the difference between thermodiffusion coefficient DT and thermodiffusion coefficient for a particular species DT,i?

11 November 2016 0 3K Report

Jx=-rho*DT*co(1-co)*DelT (Mass flux due to thermal gradient). DT coefficient in this equation is not same with DT,i or DT,j given in the equation in the attached jpg. What is the relation between them?

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