Axial flow fans (also called electronic cooling fans) are characterized by the working fluid (air) that principally..

http://www.engineersedge.com/industrial-equipment/axial-flow-fans.htm

Electronic cooling fans are used to draw or flow air from the outside of a electronic enclosure into the electronics area, expel heated air from inside of the enclosure, or move air across a heat sink or electronic..

http://www.engineersedge.com/industrial-equipment/electronic-cooling-fans.htm