1. A boundary or interface that changes position over time, particularly in physics, mathematics, and engineering contexts such as phase transitions, fluid dynamics, or diffusion problems
The moving boundary between the solid and liquid phases during melting requires special numerical techniques to solve.
A fronteira móvel entre as fases sólida e líquida durante a fusão requer técnicas numéricas especiais para resolver.
2. In geography and politics, a territorial or jurisdictional line that shifts due to natural processes, agreements, or conflicts
The moving boundary of the glacier has been receding due to climate change.
A fronteira móvel da geleira tem se recuado devido às mudanças climáticas.