Numerical investigation of a novel diffuse wall ventilation: thermal comfort and cross-infection control effectiveness

Chen Zhang, Gaute Larsen Tveit, Truls Ramstad, Peter V. Nielsen, Rasmus Lund Jensen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review


A novel ventilation system is presented in this study, named diffuse wall ventilation. The system is suitable for renovation projects, where the low ceiling and visible inlet and ducts are not accepted due to space limitation and design preference. The ventilation performance is evaluated by the numerical method under different operating conditions and inlet configurations. The CFD results indicate that diffuse wall ventilation creates a stratified flow pattern that is comparable to displacement ventilation. Due to the large inlet area, the air velocity in the occupied zone is much lower than displacement ventilation. The half-wall inlet provides the best performance in preventing cross-infection between occupants. The personal exposure index εexp for the target person is up to 11.8, the values with the full-wall inlet and lamella inlet are 2.16 and 5.04, respectively. This study indicates that diffuse wall ventilation is a promising ventilation principle for office buildings with low ceiling height.
Original languageEnglish
Title of host publicationProceedings of Building Simulation 2021 : 17th Conference of International Building Performance Simulation Association. Bruges, Belgium, 1-3 September 2021
Publication date2021
Article number30204
Publication statusPublished - 2021
EventIBPSA Building Simulation 2021 - Bruges + Virtual, Belgium
Duration: 1 Sept 20213 Sept 2021
Conference number: 18


ConferenceIBPSA Building Simulation 2021
CityBruges + Virtual
Internet address


  • CFD
  • Diffuse wall ventilation
  • Cross-infection
  • Thermal comfort
  • Building ventilation


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