path line and vector plot

YK

I am solving problem in which.... stationary tank is open to atmosphere,1/3 of tank is fill of water remaining is air,inlet and outlet is in the bottom of the tank.its a two phase problem and i am applying VOF model for solving it..in this way i am not getting separate path line for water,interface and air,also vector plot seems like only water is in the tank ..please help i will be grateful..thanks