Numerical validation of the dusty-gas model for binary diffusion in low aspect ratio capillaries
Abstract
The dusty-gas model is an empirical formulation commonly used to describe gas flows in porous media. While experiments have validated the model for pores with high aspect ratios, a validation for near-unity aspect ratios is lacking. We used direct simulation Monte Carlo to evaluate the accuracy of the dusty-gas model for binary diffusion in low aspect ratio capillaries. Our results suggest that the dusty-gas model deviates from the Monte Carlo simulations by less than 3% for aspect ratios ≥ 1, thus supporting its suitability as a phenomenological model for transport in nanoporous structures in various applications such as heat transfer, catalysis, and water purification.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 01, 2021
- Source ID
- 10.1063/5.0072800
Entities
People
- Evelyn Wang
- Geoffrey Vaartstra
- Jeffrey Grossman
- Zhengmao Lu
Organizations
- Air Force Office of Scientific Research
- Massachusetts Institute of Technology