1. KJELD SVIDT, AALBORG UNIVERSITY Virtual Reality visualisation of airflow and indoor environment in ventilated livestock buildings Kjeld Svidt Aalborg University TEKES-INFRA-IT-CLUB 28. September 2001 VR Media Lab, Aalborg

2. KJELD SVIDT, AALBORG UNIVERSITY Background Research project: “Control of Air Movement in Livestock Buildings” (1995-2001)... a joint research project between three Danish research groups: The Royal Veterinary and Agricultural University, Department of Animal Science & Animal Health, Copenhagen, Denmark Danish Institute of Agricultural Sciences, Department of Agricultural Engineering, Research Centre Bygholm, Horsens, Denmark Aalborg University, Department of Building Technology and Structural Engineering, Aalborg, Denmark - Livestock production an important export industry in Denmark - Increased focus on working environment, indoor air quality, animal welfare - New housing types and production systems - New design tools such as Computational Fluid Dynamics (CFD)

3. KJELD SVIDT, AALBORG UNIVERSITY Background At the end of the project it was decided to make a one-day information seminar for professionals in the ventilation industry and consultants from the agricultural extension service. For this seminar, a few cases reflecting research results as well as problem-cases from the industry were selected to be presented in the Virtual Reality facilities at Aalborg University. Airflow was calculated with the commercial CFD-code Fluent version 5.5. Results were converted and displayed with the visualisation code VU (www.cerca.umontreal.ca/vu). The results were displayed in the panorama as well as the six-sided CAVE.

4. KJELD SVIDT, AALBORG UNIVERSITY Cases selected for VR presentation in the project 1.3D airflow in a laboratory set-up with an isothermal slot inlet 2.Airflow and CO2-concentrations in a laboratory set-up with 4 wall inlets and “pig simulators” 3.Simulation of displacement ventilation in a room with closed pen partitions 4.Airflow in a similar room with a low momentum ceiling inlet 5.Airflow in a room with a radial inlet device

5. KJELD SVIDT, AALBORG UNIVERSITY Case 1 3D airflow in a laboratory set-up with an isothermal slot inlet Air inlet Air exhaust

6. KJELD SVIDT, AALBORG UNIVERSITY Case 2 Case 2. Airflow and CO2 concentration in a laboratory set-up with 4 wall inlets and “pig simulators” Air inlet Air exhaust

7. KJELD SVIDT, AALBORG UNIVERSITY Case 3 – 4 Case 3 - 4. Airflow in a room with closed pen partitions Air inlet Air exhaust

8. KJELD SVIDT, AALBORG UNIVERSITY Case 5 Airflow in a room with a radial inlet device Air inlet Air exhaust

9. KJELD SVIDT, AALBORG UNIVERSITY References The project homepage http://www.civil.auc.dk/i6/klima/projects/livestock VR Media Lab, Aalborg http:// www.vrmedialab.dk/ IT in civil engineering at Aalborg University http:// it.civil.auc.dk Indoor Environmental Engineering at Aalborg University http:// iee.civil.auc.dk Center for AgroTechnology - Aalborg University http:// cjt.auc.dk