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Description: Experiments are described in which smoke and temperature sensors were used to delineate the trajectories of cold ventilation air jets from two types of inlet, each in two locations, in a full-scale experimental facility. A drop coefficient was developed to characterize the tendencies of the jets to drop and this coefficient was found to be related to an Archimedes number. The slope of this relationship depended on the type and location of the inlet. Jets with Archimedes numbers of less than 50 appear to be satisfactory for most agricultural ventilation systems, unless they issue from inlets that are located at some distance from both walls and ceiling. In the latter case an Archimedes number of 40 is appropriate.

Keywords: archimedes number criteria for the control of cold ventilation air jets
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Citation: Leonard, J. J. and J. B. McQuitty 1986. ARCHIMEDES NUMBER CRITERIA FOR THE CONTROL OF COLD VENTILATION AIR JETS. Canadian Agricultural Engineering 28(2):117-124.
Volume: 28
Issue: 2
Pages 117 - 124
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Date: 1986
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Coverage: Canada
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