CFD Benchmark Tests for Indoor Environmental Problems: Part 2 Cross-Ventilation Airflows and Floor Heating Systems


  • Kazuhide Ito Kyushu University
  • Kiao Inthavong Kyushu University
  • Takashi Kurabuchi Kyushu University
  • Toshikatsu Ueda Kyushu University
  • Tomoyuki Endo Kyushu University
  • Toshiaki Omori Kyushu University
  • Hiroki Ono Kyushu University
  • Shinsuke Kato Kyushu University
  • Koji Sakai Kyushu University
  • Yoshihide Suwa Kyushu University
  • Hiroshi Matsumoto Kyushu University
  • Hajime Yoshino Kyushu University
  • Weirong Zhang Kyushu University
  • Jiyuan Tu Kyushu University



Indoor environment, Computational Fluid Dynamics, Benchmark test, Cross-ventilation airflows, floor heating systems.


Commercial Computational Fluid Dynamics (CFD) software is practically applied in indoor environmental design recent years but the prediction accuracy of CFD simulation depends on the understanding for the fundamentals of fluid dynamics and the setting of appropriate boundary and numerical conditions as well. Additionally, deeper understanding to a specific problem regarding indoor environment is also requested. The series of this study aimed to provide with the practical information such as prediction accuracy and problematic areas related to CFD applications in indoor environment, air conditioning and ventilation, then performed benchmark tests and reported the results. In this Part 2, benchmark test results for cross-ventilation airflows and floor heating systems were introduced.The highest reproducibility of the predicted results compared with the wind tunnel results occurred when the Z0-type wall function was used as the floor-surface boundary condition and the SST k–ω for the turbulence model in case of cross-ventilation flow and SST k–ω model showed also the closest matching results with experiment in case of natural convection in a room with floor heating.

Author Biographies

Kazuhide Ito, Kyushu University

Engineering Science

Kiao Inthavong, Kyushu University

Engineering Science

Takashi Kurabuchi, Kyushu University

Engineering Science

Toshikatsu Ueda, Kyushu University

Engineering Science

Tomoyuki Endo, Kyushu University

Engineering Science

Toshiaki Omori, Kyushu University

Engineering Science

Hiroki Ono, Kyushu University

Engineering Science

Shinsuke Kato, Kyushu University

Engineering Science

Koji Sakai, Kyushu University

Engineering Science

Yoshihide Suwa, Kyushu University

Engineering Science

Hiroshi Matsumoto, Kyushu University

Engineering Science

Hajime Yoshino, Kyushu University

Engineering Science

Weirong Zhang, Kyushu University

Engineering Science

Jiyuan Tu, Kyushu University

Engineering Science


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How to Cite

Ito K, Inthavong K, Kurabuchi T, Ueda T, Endo T, Omori T, Ono H, Kato S, Sakai K, Suwa Y, Matsumoto H, Yoshino H, Zhang W, Tu J. CFD Benchmark Tests for Indoor Environmental Problems: Part 2 Cross-Ventilation Airflows and Floor Heating Systems. Int. J. Archit. Eng. Technol. [Internet]. 2021Apr.23 [cited 2021Jun.17];2(1):23-49. Available from:




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