32 Propaneâs Greenhouse Gas Emissions: A Comparative Analysis http://www.eere.energy.gov/consumer/your_home/water_heating/index.cfm/mytopic=12850 (accessed May 2007). U.S. Department of Energy (DOE), Building Research and Standards Office, 2000.
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In simple terms a vortex generator is a device that creates a swirl or vortex of fluid due to its shape. Vortex generators work by mixing high-energy fluid (freestream air in this case) with the lower energy fluid found near the skin surface, called the boundary layer. This process is called re-energizing the boundary layer.