Virtual Reality visualisation of airflow and indoor environment in ventilated livestock buildings

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

2. 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) KJELD SVIDT, AALBORG UNIVERSITY

3. 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. KJELD SVIDT, AALBORG UNIVERSITY

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

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

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

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

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

9. 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 KJELD SVIDT, AALBORG UNIVERSITY