Julien Berger

Julien Berger serves as a CNRS Research Fellow at the University of La Rochelle, France, where he conducts interdisciplinary research at the intersection of building physics, heat transfer, and sustainable construction. His work bridges theoretical modeling with practical building applications through his affiliation with the Department of Civil Engineering and Building Physics within the Faculty of Science and Technology. Berger maintains strong collaborative ties with the LOCIE Laboratory (Laboratory of Heat and Energy Sciences) at Université Savoie Mont Blanc and international partners, particularly in Brazil.

His research focuses on modeling heat and mass transfer phenomena in porous building materials, developing fast and accurate numerical models, improving model reliability through experimental validation, and solving parameter estimation problems for determining thermophysical properties. Berger's work emphasizes practical applications for building energy efficiency, climate change adaptation, and sustainable construction materials. His research methodology combines advanced computational techniques including Proper Generalized Decomposition, spectral reduced-order methods, and Bayesian parameter estimation with rigorous experimental validation.

Berger's publication record shows significant research productivity with over 100 peer-reviewed publications spanning building physics, heat transfer, and numerical methods. His recent work (2023-2025) demonstrates increasing focus on climate change adaptation in building design, advanced numerical techniques for energy efficiency optimization, and the development of sustainable bio-based construction materials. The research shows strong interdisciplinary connections between civil engineering, materials science, and computational physics.

Berger actively supervises multiple PhD students including Suelen Gasparin, Ainagul Jumabekova, and Sultan Alpar, who frequently serve as first authors on collaborative publications. His research program appears well-funded through CNRS support and likely national and international grants focused on building energy efficiency and sustainable construction. The research has practical implications for building design, retrofitting strategies, and material development in the construction industry.

His laboratory work centers on the Building Physics and Energy Modeling Laboratory at University of La Rochelle, where he combines computational modeling with experimental validation of building materials and systems. The research environment supports both fundamental investigations of heat and mass transfer phenomena and applied studies addressing real-world building performance challenges.