AI Article Synopsis
- The study introduces diffuse reflection boundary conditions in a thermal lattice Boltzmann model for varying fluid density and temperature along walls.
- The model effectively captures the thermal transpiration phenomenon in a box at specific Knudsen numbers.
- Results show that thermal creep velocity correlates with the temperature gradient at the wall, with simulation accuracy varying between first or second order, based on the numerical method used.
Article Abstract
Diffuse reflection boundary conditions are introduced in a thermal lattice Boltzmann model to allow for variable fluid density and temperature along the walls. The capability of this model to capture the main characteristics of the thermal transpiration phenomenon in a box at nonvanishing Knudsen numbers is demonstrated. The thermal creep velocity is found to be proportional to the temperature gradient imposed at the wall, whereas the accuracy of the simulation results are found to be of first or second order, depending on the numerical scheme.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevE.74.056705 | DOI Listing |
Publication Analysis
Top Keywords
lattice boltzmann
8
thermal transpiration
8
boltzmann approach
4
thermal
4
approach thermal
4
transpiration diffuse
4
diffuse reflection
4
reflection boundary
4
boundary conditions
4
conditions introduced
4
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!