Agricultural and Biosystems Engineering Publications

Document Type

Article

Publication Date

1992

Journal or Book Title

Transactions of the ASAE

Volume

35

Issue

2

First Page

671

Last Page

686

Abstract

A three-dimensional turbulence model was used to determine the effects of animal-generated buoyant forces on the airflow patterns and temperature and airspeed distributions in a ceiling-slot, ventilated, swine grower facility. The model incorporated the Lam-Bremhorst turbulence model for low-Reynolds Number airflow typical of slot-ventilated, livestock facilities. The predicted results from the model were compared with experimental results from a scaled-enclosure. The predicted and measured results indicated a rather strong cross-stream recirculation zone in the chamber that resulted in substantial three-dimensional temperature distributions for moderate to highly buoyancy-affected flows. Airflow patterns were adequately predicted for Arc > 40 and J values < 0.00053. For Arc < 40 and J values > 0.00053, the visualized patterns indicated that the jet separated from the ceiling before the opposing end-wall. This discrepancy was attributed to variations in the experimental and numerical inlet flow development assumptions.

Comments

This article is from Transactions of the ASAE 35, no. 2 (1992): 671–686.

Access

Open

Copyright Owner

American Society of Agricultural Engineers

Language

en

File Format

application/pdf

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