An electrohydrodynamic (EHD) gas pump inside a square channel is experimentally evaluated for its effectiveness in flow delivery. The gas pump with 3 electrode configurations (separately with 1, 3 and 7 emitting electrodes) is powered by DC voltages ranging from 24 kV to 30 kV. The emitting electrodes are flush mounted on two channel walls pararllel to each other. The performance of the pump is evaluated using an energy effectiveness factor, which is defined as the volume flow rate delivered by a unit power input. It is found that this parameter has a maximum value for the EHD pump with a configuration of 3 emitting electrodes. These results reveal that EHD gas pump has a great potential for applications in thermal management and can be more energy-efficient when operated with uneven applied voltages.
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