About Schlunder’s model: A numerical study of evaporation from partially wet surfaces

Marouane Talbi (1) , Marc Prat (1)

1 IMFT - Institut de mécanique des fluides de Toulouse

Estimate of evaporation rate from a partially wet surface using Schlünder’s analytical model is assessed from comparison with numerical simulations. The influence of pore shape and pore size heterogeneity is explored as well as the limit of the very low wet surface fractions. A modified form of Schlünder’s formula is proposed for the heterogeneous surfaces by using the pore influence surface areas obtained from a minimum distance surface tessellation technique. The modified formula provides a simple method for coupling the external transfer and the internal transfer in the pore network modeling of drying.

Mots clés: External transfer; Heterogeneous porous surface; Pore network; Porous media

Domaines: Mécanique des fluides [physics.class-ph]

Marouane Talbi, Marc Prat. About Schlunder’s model: A numerical study of evaporation from partially wet surfaces. Drying Technology, 2018, 37, pp.513-524. ⟨10.1080/07373937.2018.1506929⟩. ⟨hal-02355914⟩