Work

A novel decoupled model for water and heat coupling in frozen soil and numerical analysis

Year: 2025

Type: article

Abstract: A theoretical model for coupled water-heat processes in frozen soil, considering phase change effects, is developed based on energy and mass conservation principles and the soil freezing curve. Through mathematical derivation, a novel decoupled control equations are obtained to facilitate numerical implementation. The differential equation module of the COMSOL platform is redeveloped, and the decoupled water-heat coupling theory of frozen soil is embedded to realize numerical modeling. Based on in-situ monitoring data from cold region subgrade, the reliability and accuracy of numerical calculations were validated. Subsequently, the subgrade in a specific region of Northwestern China was chosen as the research subject, and an analysis was conducted on its water-heat migration response characteristics under surface conditions. The research results are expected to provide some technical support for engineering practice.

Source: Scientific Reports

DOI: 10.1038/s41598-025-97902-7

Authors: Peipei Chen, Zhi Shang, Ruisong Zhu, Qingfeng Yin, Lei Dong, Shan Feng

Institutions: Beijing University of Civil Engineering and Architecture, China Communications Construction Company (China), China Railway Construction Corporation (China)

Language: English

Topic: Soil and Unsaturated Flow

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Climate action

Open Access status: gold

Estimated APC paid: $2,690