Comparison of Predicted and Measured Air Flow Patterns in a Mechanically Ventilated Livestock Building without Animals
✍ Scribed by B.B. Harral; C.R. Boon
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 326 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0021-8634
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✦ Synopsis
Air flow in a section from a full scale livestock building has been simulated using PHOENICS , a computational fluid dynamics program , to give the mean velocity and turbulence energy distribution under isothermal conditions . The section has sloping ceilings , an air intake at the apex , and side-wall extractor fans . A narrow inlet gap creates the horizontal air jet which is the basis of the ventilation system . A summer ventilation rate of 44 air changes per hour was simulated , with a Jet Momentum Number of 0 и 0076 and an inlet Reynolds Number of 5x10 4 based on a gap size of 0 и 1 m and a mean velocity of 6 и 1 m s Ϫ 1 . Calculated mean air velocites within the