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Low Dean number flows in helical ducts of rectangular cross section
The flow in a helical duct is characterized by increased fluid mixing, accomplished by the inducement of a secondary flow in the plane normal to the helix centerline. Two independent phenomena interact to produce this ...
Degradation of optical properties in anodic coatings exposed to vacuum-ultraviolet radiation
Sulfuric acid anodized aluminum coating systems possessing a low ratio of solar absorptance to infrared emittance are susceptible to vacuum-ultraviolet radiation. Vacuum-ultraviolet exposure can degrade the coating systems ...