dilution index (DI)

[ISO 16814:2008, 3.10]:ratio of the removal of a contaminant from an enclosure to the rate of its generation.NOTE An enclosure with a higher dilution index represents a less contaminated enclosure. Dilution indices are calculated for each contaminant generated within the Continue reading →

discharge coefficient

[AIVC, Air infiltration and ventilation glossary, 1992]:a dimensionless coefficient relating the mean flow rate through an opening to an area and the corresponding pressure difference across the opening.

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