Simulation of evaporation of liquid film

The particle method engine VSOP-PS was used to analyze particle segregation occurring during the evaporation and drying of liquid films. Simulations were performed for liquid films containing two types of fillers of different sizes. The density distribution in the film thickness direction was calculated, successfully reproducing the tendency of smaller particles to accumulate near the surface.

Use Cases Highlights

Filler density distribution analysis during evaporation and drying using the particle method
Capability to handle fillers of different particle sizes
Analysis of the effect of drying processes on particle segregation

Analysis of filler density distribution during evaporation and drying using the particle method

An evaporation–drying model of a liquid film containing two sizes of fillers is shown. Using the Moving Particle Simulation (MPS) method, the model reproduces how fillers aggregate at the film surface as the solvent decreases during evaporation. This allows visual observation of particle behavior during drying.

Liquid film evaporation and drying model

Capability to handle fillers with different particle sizes

The density distribution of fillers in the thickness direction of the membrane at the final stage of evaporation drying is shown. Smaller fillers are distributed with higher density near the membrane surface compared to larger fillers, clearly indicating a tendency for particle segregation. This enables prediction of particle arrangement in the membrane structure after drying.

Filler density distribution in the film thickness direction

Analysis of the effect of drying process on particle segregation

The particle structure after evaporation and drying is visualized as an isosurface. The three-dimensional representation shows particle distribution and aggregation states, providing useful information for evaluating the effects of drying conditions and particle properties on the final structure.