Shen, Chao;
Cui, Kaidong;
Wei, Shen;
Zhang, Dongwei;
Zhang, Shilong;
Tian, Guo;
Song, Ge;
(2025)
Numerical simulation of water evaporation and migration characteristics of heat storage soil layer at pore scale.
Applied Thermal Engineering
, 277
, Article 127090. 10.1016/j.applthermaleng.2025.127090.
![[thumbnail of Wei_Revised Manuscript with Changes Marked.pdf]](https://discovery.ucl.ac.uk/style/images/fileicons/text.png) |
Text
Wei_Revised Manuscript with Changes Marked.pdf Access restricted to UCL open access staff until 10 June 2026. Download (4MB) |
Abstract
In this paper, based on the improved soil generation method, a numerical model of water evaporation in the heat storage soil layer was established by using the mesoscale lattice Boltzmann method and the Gong-Cheng phase transition model. The model simulated the effects of various temperature differences, soil wettability, surface air humidity, and soil porosity on saturated soil moisture evaporation. The results showed that the greater the temperature difference between the deep soil and the surface air, the faster the migration and evaporation of soil moisture. When the temperature difference was 33 K, the evaporation time was the least, which was 4.48 s. The wettability of soil has a significant influence on the evaporation of water. Soil with a smaller contact angle has a higher water-holding capacity, but poor drainage capacity, resulting in water accumulation. When the contact angle was 20.8°, the evaporation time required was the longest, which was 8.31 s. The evaporation rate of soil moisture is significantly affected by the humidity of the surrounding air. Under low humidity conditions, it was observed that the evaporation process was particularly active and the evaporation time was short, with the shortest being 8.13 s. Porosity is an important factor affecting soil moisture evaporation and migration. When the porosity increased from 0.4 to 0.7, the evaporation time increased from less than 2.0 s to 6.0 s. The characteristics of low-porosity soil are high concentration of solid particles, low thermal conductivity, poor fluid flow and increased evaporation time. Studying the characteristics of water evaporation and migration in the heat storage soil layer can provide theoretical support for the fields of agriculture and roadbed disasters.
| Type: | Article |
|---|---|
| Title: | Numerical simulation of water evaporation and migration characteristics of heat storage soil layer at pore scale |
| DOI: | 10.1016/j.applthermaleng.2025.127090 |
| Publisher version: | https://doi.org/10.1016/j.applthermaleng.2025.1270... |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Lattice Boltzmann method, Soil, Heat storage , Evaporation, Water migration |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10212019 |
Archive Staff Only
 |
View Item |
