The hazards associated with chemical releases are of concern for both indoor and outdoor environments.  Using FLACS, GexCon has experience characterizing various chemical emissions, modeling the resulting dispersion, and evaluating exposures at various locations from the source.

GexCon has experience investigating chemical releases and evaluating the associated exposure. Outdoor chemical releases can be the result of industrial operations, fires, explosions, spills or tank failures. Indoor releases can occur from material off-gassing, chemical interactions, or overheated consumer products. In addition, carbon monoxide emission from malfunctioning or misused combustion appliances can migrate throughout a structure. GexCon has experience characterizing var ious chemical emissions, modeling the resulting dispersion, and evaluating exposures at various locations from the source.  Below is an experimental hydrogen gas release (left) and GexCon's blind simulation of the release (right).

Experimental hydrogen release        Blind simulation of experimental hydrogen release

Outdoor chemical exposure is dependent on the size and rate of the chemical release, areas of confinement in the vicinity of the release, terrain, vegetation and outdoor wind conditions. The figure below shows a toxic release of a dense gas from a stack under low-wind conditons and the resulting exposure limits from the dispersion.

Toxic release from a stack of a dense gas

Chemical exposures within a structure are strongly dependent on the rate of chemical release, dispersion and migration throughout the facility, mechanical ventilation within the structure, and air exchanges of the structure with the outdoors.  GexCon has numerically modeled both outdoor and indoor releases as well as subsequent migration using the industry recognized CFD code FLACS, that has been extensively validated against experimental data. 

 

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