A comprehensive review of modeling water solidification for droplet freezing applications

S Akhtar, M Xu, M Mohit, AP Sasmito - Renewable and Sustainable Energy …, 2023 - Elsevier
Various mathematical approaches undertaken to model all stages of droplet freezing are
reviewed. The literature is rife with theoretical, experimental, and numerical treatments of the …

Multi-scale analysis for solidification of phase change materials (PCMs): experiments and modeling

M Xu, Y Hanawa, S Akhtar, A Sakuma, J Zhang… - International Journal of …, 2023 - Elsevier
We present a multi-scale solidification framework for pure substances using laboratory
experiments and mathematical modeling. The multi-scale phenomena of solidification are …

Development and validation of a semi-analytical framework for droplet freezing with heterogeneous nucleation and non-linear interface kinetics

S Akhtar, M Xu, AP Sasmito - International Journal of Heat and Mass …, 2021 - Elsevier
We present a novel, semi-analytical framework which accurately predicts every stage of
droplet freezing. Supercooling degree of the freezing droplet is computed by coupling the 1 …

[HTML][HTML] Survival, extinction, and interface stability in a two-phase moving boundary model of biological invasion

MJ Simpson, N Rahman, SW McCue… - Physica D: Nonlinear …, 2023 - Elsevier
We consider a moving boundary mathematical model of biological invasion. The model
describes the spatiotemporal evolution of two adjacent populations: each population …

Modeling residual thermal stresses in layer-by-layer formation of direct metal laser sintering process for different scanning patterns for 316L stainless steel

H Sezer, J Tang, AMMN Ahsan, S Kaul - Rapid Prototy** Journal, 2022 - emerald.com
Purpose The purpose of this study is to develop a novel comprehensive three-dimensional
computational model to predict the transient thermal behavior and residual stresses …

Asymptotic analysis of a two-phase Stefan problem in annulus: Application to outward solidification in phase change materials

M Xu, S Akhtar, AF Zueter, MA Alzoubi… - Applied Mathematics …, 2021 - Elsevier
Stefan problems provide one of the most fundamental frameworks to capture phase change
processes. The problem in cylindrical coordinates can model outward solidification, which …

Development and validation of an asymptotic solution for a two-phase Stefan problem in a droplet subjected to convective boundary condition

S Akhtar, M Xu, AP Sasmito - International Journal of Thermal Sciences, 2021 - Elsevier
Droplet solidification is governed by classical Stefan problems which have been commonly
treated as a single-phase problem by the majority of the studies in the literature. This …

Development of analytical solution for a two-phase Stefan problem in artificial ground freezing using singular perturbation theory

M Xu, S Akhtar, AF Zueter, V Auger… - Journal of Heat …, 2020 - asmedigitalcollection.asme.org
Artificial ground freezing (AGF) has historically been used to stabilize underground structure.
Numerical methods generally require high computational power to be applicable in practice …

[HTML][HTML] A simple model for latent thermal energy storage systems with encapsulated phase-change material

FB Planella - International Journal of Heat and Mass Transfer, 2025 - Elsevier
Efficient thermal energy storage systems are called to be a key part of any successful
transition to a net zero future. Latent thermal energy storage provides high energy density …

Thermal imaging-based state estimation of a Stefan problem with application to cell thawing

P Srisuma, A Pandit, Q Zhang, MS Hong… - Computers & Chemical …, 2023 - Elsevier
The Stefan problem describes the evolution of the interface between two phases of a
material undergoing phase change. Its formulation has been applied to model and solve a …