煤烧圆家重点实验宝 3. Diffusion Equation wih=p、=YP,amd[SY=+w Dy+可 D +w|=0 ax With reynolds transport low and Fick law Dt v at ) OX Combustion, HUst n 430074P R CHINA E-mail:pcbnlcc@hust.edu.cnNL CC National Lab. of Coal Combustion, HUST Wuhan 430074, P. R. CHINA E-mail: pcbnlcc@hust.edu.cn 3. Diffusion Equation with  = rs =Ysr, and    = + V s S s V S V j dS wV = 0         +   +  V s j s j V s w V x j Y V Dt D r   With Reynolds transport low and Fick Law ( ) ( )             = −             +   =   j s j j s j V s j j s V s x Y D x x j Y v V x Y t Y V Dt D r r  r r 