Research
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Development of analytical solution for a two-phase Stefan problem in artificial ground freezing using singular perturbation theory
Abstract
Artificial ground freezing (AGF) has historically been used to stabilize underground structure. Numerical methods generally require high computational power to be applicable in practice. Therefore, it is of interest to develop accurate a...
Publication · January 11, 2026
Analytical modeling of outward solidification with convective boundary in cylindrical coordinates
Abstract
Solidification consists of three stages at macroscale: subcooling, freezing and cooling. Classical two-phase Stefan problems describe freezing (or melting) phenomenon initially not at the fusion temperature. Since these problems only def...
Publication · January 11, 2026
Freezing on demand: A new concept for mine safety and energy savings in wet underground mines
Abstract
The artificial ground freezing (AGF) systems are designed to operate continuously for an extended period of time to control the groundwater seepage and to strengthen the groundwater structure surrounding excavation areas. This mode of op...
Publication · January 11, 2026
Heat transfer analysis in artificial ground freezing under high seepage: Validation and heatlines visualization
Abstract
The primary goal of artificial ground freezing (AGF) system is to create a hydraulic barrier encircling working areas and stall groundwater seepage. This goal is achieved once a consolidated frozen wall is developed between the freeze pi...
Publication · January 11, 2026
On the concept of the freezing-on-demand (FoD) in artificial ground freezing for long-term applications
Abstract
The continuous mode of operation of artificial ground freezing (AGF) systems in long-term applications requires intensive energy consumption, which leads to immense operating and maintenance costs not to mention a large carbon footprint....
Publication · January 11, 2026
On the performance of ground coupled seasonal thermal energy storage for heating and cooling: A Canadian context
Abstract
This study examines the feasibility of capturing and storing the coolth from the winter and the heat from the summer in the ground by utilizing the groundwater’s ability to phase change as a storage media. A novel system that implements ...
Publication · January 11, 2026
Singular perturbation solution for a two-phase Stefan problem in outward solidification
Abstract
Mathematical modeling of phase change process in porous media can help ensure the efficient design and operation of thermal energy storage and pipe freezing. Numerical methods generally require high computational power to be applicable i...
Publication · January 11, 2026
First-principle dynamic modeling of a linear micro-compressor
Abstract
Compressor is the main component in the Vapor Compression Cooling cycle (VCC). Comparing with scroll and screw compressors, linear compressors are used in miniature-scale VCC cycle for small and portable applications such as electronics ...
Publication · January 11, 2026
Development and validation of enthalpy-porosity method for artificial ground freezing under seepage conditions
Abstract
Groundwater flow has an undesirable effect on ice growth in artificial ground freezing (AGF) process: high water flow could hinder the hydraulic sealing between two freeze pipes. Therefore, a reliable prediction of the multiphysics groun...
Publication · January 11, 2026
Freezing on demand (FoD): An energy saving technique for artificial ground freezing
Abstract
The artificial ground freezing (AGF) systems are typically designed to operate continuously for two main reasons: (i) to maintain a certain thickness of the frozen barrier which strengthens the ground’s structure, and (ii) to stop ground...
Publication · January 11, 2026
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