# Diffusion dominated evaporation in multicomponent lattice Boltzmann simulations

## TL;DR

This paper introduces a diffusion-dominated evaporation model using multicomponent lattice Boltzmann simulations, validating it through analytical and numerical comparisons for planar films and droplets, emphasizing the importance of Laplace pressure.

## Contribution

The paper develops and validates a new evaporation model within the multicomponent lattice Boltzmann framework, incorporating analytical diffusion coefficients and demonstrating agreement with theoretical predictions.

## Key findings

- Fick's law is obeyed in the model.
- The model accurately predicts the interface evolution of evaporating films.
- Laplace pressure significantly affects small droplet evaporation dynamics.

## Abstract

We present a diffusion dominated evaporation model using the popular pseudopotential multicomponent lattice Boltzmann method introduced by Shan and Chen. With an analytical computation of the diffusion coefficients, we demonstrate that Fick's law is obeyed. We then validate the applicability of our model by demonstrating the agreement of the time evolution of the interface position of an evaporating planar film to the analytical prediction. Furthermore, we study the evaporation of a freely floating droplet and confirm that the effect of Laplace pressure is significant for predicting the time evolution of small droplet radii.