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OpenFoam-Based Numerical Modeling of Overland Flow in Indealized Constructed Environment: Laboratory Validation
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Abstract
This study employed the OpenFOAM framework coupled with the olaFlow solver to simulate wave-driven overland flows in an idealized coastal community, with a particular focus on the validation of the numerical model as the first preliminary research study. A series of large-scale 1:16 laboratory experiments in a three-dimensional wave basin, conducted under a wide range of water levels, wave conditions, and structural configurations, including a seawall (SW) and a submerged breakwater (SB), served as the benchmark for validation. Model performance was assessed by comparing time series of offshore and onshore free-surface elevations, horizontal velocities, and hydrodynamic loads (forces and pressures) on building arrays in an idealized constructed environment. Furthermore, the validation results exhibited a strong agreement between measured and simulated hydrodynamic and loading variables, with normalized root-mean-square errors (NRMS) less than 15.32% and an index of agreement (IA) up to 0.95. These findings establish that the olaFlow solver can reliably reproduce time series of hydrodynamic parameters, providing a robust foundation for subsequent evaluation of coastal flooding mitigation strategies.
Keywords
Laboratory, openFOAM, overland flow, coastal communities, mitigation structures
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