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Article: Evaluating RNG k-[epsilon] models using PIV data for airflow in animal buildings at different ventilation rates.(Particle image velocimetry)
- Article from:
- ASHRAE Transactions
- Article date:
- January 1, 2007
- Author:
CopyrightCOPYRIGHT 2007 American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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ABSTRACT
PIV data were used to evaluate a renormalization group (RNG) k-[epsilon] turbulence model of airflow in a full-scale test room (5.5 x 3.7 x 2.4 m [18.0 x 12.1 x 7.9 ft]) using FLUENT software. Three typical ventilation cases with ventilation rates of 0.12, 0.26, and 0.90 [m.sup.3]/s (250, 560, and 1900 cfm), which are equivalent to inlet Reynolds numbers of 2300, 5500, and 16,000, were evaluated for airflow patterns and air distribution. The RNG k-[epsilon] turbulence model predicted airflow patterns, air distributions, and air velocities similar to PIV data throughout the room space. With the air ventilation rate increased from 0.12 to 0.26 [m.sup.3]/s ...
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