煤量甏圆家重点实验宝 e. D POr p or D2=a0+△ This is called Reynolds transport Principle It means the variation rate of the intergral of o in the control volume moved along rue equals the change with time plus the varation ab of Coal Combustion, HUST introduced by convection in Euler coordinateNL CC National Lab. of Coal Combustion, HUST Wuhan 430074, P. R. CHINA E-mail: pcbnlcc@hust.edu.cn i.e. ( v ) V t x V Dt D V j j V                  +   = or  +   =  S vn dS Dt t D  This is called Reynolds Transport Principle. It means the variation rate of the intergral of  in the control volume moved along rue equals the change with time plus the varation introduced by convection in Euler coordinate