Notations ·Subscript ijk,as for vector or tensor component -I/L,d/D,g/G,for different phases,such as,liquid, dispersed,gas.… Frequently used properties -Volumetric flux,jNi, Total volumetric flux,jN -Mass flux,GN -Velocity of specific phase,uai,reletive velocity uABi Volumetric fraction of a phase,aN -jN-aN UNi,J=aN UNiNotations • Subscript – ijk，as for vector or tensor component – l/L, d/D, g/G，for different phases, such as, liquid, dispersed, gas… • Frequently used properties – Volumetric flux, jNi , – Total volumetric flux, jN – Mass flux, GN – Velocity of specific phase, uAi , reletive velocity uABi – Volumetric fraction of a phase, αN – jN= αN uNi , j i= ΣαN uNi