Thanks a lot for your response.nI need to know more things for having better understandings.n1- As I am giving boundary condition mass fraction of H20 and i have to observe moisture content distribution across the surface. In other words, moisture content from one face to adjacent (from one side to other side) I will see either mass fraction of h20 or mole fraction of h20. Both contours are serving the same purpose for depicting moisture content? or I have to focus only mass fraction. Given the fact, I am giving input in mass fraction of h20.n2- In Ansys Fluent, while I am inputting mass fraction of H20 in boundary condition, Fluent takes this input in kg/kg or in g/kg? nRegards,nAbbas Razan