Numerical modelling of air temperature and velocity in a forced and free ventilation piggery

Mossad, Ruth (2001) Numerical modelling of air temperature and velocity in a forced and free ventilation piggery. In: 2001 ASME International Mechanical Engineering Congress and Exposition (IMECE 2001), 11 - 16 Nov 2001, New York, USA.


Abstract

Pigs are subjected to intensive environment control and management for higher productivity due to their sensitivity to climatic variation, which affects their growth. The aim of the current work is to numerically model the air speed and temperature in forced and free ventilation piggeries to achieve optimum environmental control. A steady twodimensional numerical model including the effect of buoyancy, turbulence and heat generated by the pigs was solved using the computational fluid dynamics software Fluent, which is based on the integral volume method. In the forced ventilation case, air speed and temperature inside the piggery and at the pigs' level were predicted for three different locations of ventilation opening, variable air inlet velocities (in the range 0.3 mls - 7 mls), and insulated or non insulated external walls, for ambient temperatures of 5°c and 32°C. In the free ventilation case, temperature and air speed at the pig's level were predicted for a particular wind speed and direction, and some variations in the design. These variations were adding louvers in the air opening, lowering the outer wall of the piggery and changing the type of pen fence used. These results helped to identify problems in the design and offer suggestions for improvements.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: American Society of Mechanical Engineers, Heat Transfer Division.Volume 369, Issue 5, 2001, Pages 445-451. Published Version restricted.
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering (Up to 30 Jun 2013)
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering (Up to 30 Jun 2013)
Date Deposited: 30 Nov 2007 11:55
Last Modified: 14 Jan 2021 04:32
Uncontrolled Keywords: animal housing; animal environment; piggery; computational fluid dynamics; forced ventilation; airflow pattern
Fields of Research (2008): 09 Engineering > 0915 Interdisciplinary Engineering > 091501 Computational Fluid Dynamics
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
09 Engineering > 0915 Interdisciplinary Engineering > 091502 Computational Heat Transfer
Fields of Research (2020): 40 ENGINEERING > 4012 Fluid mechanics and thermal engineering > 401204 Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)
40 ENGINEERING > 4017 Mechanical engineering > 401706 Numerical modelling and mechanical characterisation
40 ENGINEERING > 4012 Fluid mechanics and thermal engineering > 401204 Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)
Socio-Economic Objectives (2008): B Economic Development > 83 Animal Production and Animal Primary Products > 8303 Livestock Raising > 830308 Pigs
URI: http://eprints.usq.edu.au/id/eprint/11052

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