CFD Benchmark Tests for Indoor Environmental Problems: Part 1 Isothermal/Non-Isothermal Flow in 2D and 3D Room Model


  • Kazuhide Ito 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
  • Kiao Inthavong Kyushu University



Indoor environment, Computational Fluid Dynamics, Benchmark test, Isothermal flow, non-isothermal flow.


Commercially available Computational Fluid Dynamics (CFD) software have been applied in indoor environmental design in recent years, but the prediction accuracy depends on an understanding of fluid dynamics fundamentals, in setting appropriate boundary and numerical conditions. This study aims to provide practical modelling information related to prediction accuracy and problematic areas in CFD applications in air conditioning and ventilation, through a series of benchmark tests and reported the results. Six commercial CFD codes were evaluated while two benchmark test cases were performed on isothermal/non-isothermal flow in 2D and 3D room models. The influence of mesh design, and turbulence models showed that using a standard k-Ã¥ model on a coarse mesh could provide sufficiently accurate results for practical purposes, by reducing the relaxation coefficient. Evaluation using different CFD programs on a non-isothermal room airflow showed different performances in predicting temperature distributions. The OpenFOAM code showed the closest matching results between three codes tests.

Author Biographies

Kazuhide Ito, 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

Kiao Inthavong, Kyushu University

Engineering Science


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How to Cite

Ito 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, Inthavong K. CFD Benchmark Tests for Indoor Environmental Problems: Part 1 Isothermal/Non-Isothermal Flow in 2D and 3D Room Model. Int. J. Archit. Eng. Technol. [Internet]. 2021Apr.23 [cited 2021Jun.17];2(1):01-22. Available from:




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