Work

An improved correlation law of the extinction coefficient for open-cell strut-based foams in view of volumetric solar absorber design

Year: 2026

Type: article

Abstract: Highlights-A new analytical extinction law for architected porous media is derived from probabilistic arguments rather than empirical fitting. -The proposed law captures the correct asymptotic behavior as porosity decreases and remains valid over a wide porosity range. -A stochastic 3D geometry generator and a Monte Carlo ray-tracing tool were developed to compute extinction coefficients numerically. -The new correlation shows excellent agreement with Monte Carlo results, with less than 2% mean error across all tested-This formulation provides a robust basis for homogenized modeling of next-generation volumetric solar absorbers.

Source: International Journal of Heat and Mass Transfer

DOI: 10.1016/j.ijheatmasstransfer.2026.128865

Authors: A. de la Vauvre, Y. Favennec, L. Cangemi, B. Rousseau

Institutions: Centre National de la Recherche Scientifique, IFP Énergies nouvelles, Laboratoire de Thermique et Energie de Nantes, Nantes Université

Language: English

Topic: Radiative Heat Transfer Studies

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,220

Funders: Agence Nationale de la Recherche, IFP Energies Nouvelles