TY - GEN
T1 - Design and fabrication of thermocapillary micro bubble pump
AU - Leu, Tzong Shyng
AU - Liu, Yan Hao
PY - 2012/1/1
Y1 - 2012/1/1
N2 - In this paper, a novel MEMS-fabricated thermal bubble pump is proposed. By using thermocapillary effect in a microchannel loop, bubbles are designed to move only in one direction of the loop. Driving heater with a square-wave signal, bubble nucleates and grows asymmetrically above the heater. As soon as the heating pulse is turned off, an interesting phenomenon is found. Instead of bubble collapse, bubble moves toward growing direction. Continuous bubbles grow and move periodically when square-wave pulsing signals are applied. Thermocapillary pumping phenomena are achieved successfully in the experiments. By adjusting background temperature field, thermocapillary pumping phenomena can be sustained. Detailed mechanism for pumping force will be discussed in this paper.
AB - In this paper, a novel MEMS-fabricated thermal bubble pump is proposed. By using thermocapillary effect in a microchannel loop, bubbles are designed to move only in one direction of the loop. Driving heater with a square-wave signal, bubble nucleates and grows asymmetrically above the heater. As soon as the heating pulse is turned off, an interesting phenomenon is found. Instead of bubble collapse, bubble moves toward growing direction. Continuous bubbles grow and move periodically when square-wave pulsing signals are applied. Thermocapillary pumping phenomena are achieved successfully in the experiments. By adjusting background temperature field, thermocapillary pumping phenomena can be sustained. Detailed mechanism for pumping force will be discussed in this paper.
UR - http://www.scopus.com/inward/record.url?scp=84867811977&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84867811977&partnerID=8YFLogxK
U2 - 10.4028/ww.scientific.net/AMR.528.23
DO - 10.4028/ww.scientific.net/AMR.528.23
M3 - Conference contribution
SN - 9783037854297
T3 - Advanced Materials Research
SP - 23
EP - 26
BT - Frontier of Nanoscience and Technology II
PB - Trans Tech Publications Ltd
T2 - 2012 International Conference on Frontier of Nanoscience and Technology, ICFNST 2012
Y2 - 26 July 2012 through 27 July 2012
ER -