TY - GEN
T1 - Continuously Variable on-Chip Flow Switcher Utilizing Vortex Generations
AU - Saito, Makoto
AU - Yamanishi, Yoko
AU - Sakuma, Shinya
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - We propose a continuously variable on-chip flow switcher (CVS) by utilizing vortex generations. Unlike previous no-moving-part valves, CVS can change the flow resistance to forward and backward flow with regulating the vortex generations, thereby allowing to rectify the oscillatory flow to the desired directions with variable rectification efficiency. In this presentation, we demonstrate the flow switching by constructing the microfluidic system enabling the high-speed flow control with the on-chip membrane pump. In this system, we generated continuous flow of less than 587 and 306 μl/min to forward and backward direction, respectively, by changing the amplitude/frequency of the oscillatory flow. Additionally, we achieved variable diodicity of 0.73 to 1.32 which indicated that rectification efficiencies are more than 10% in both directions. Especially, the revealed relationships between Reynolds number and diodicity offer the design strategy for constructing CVS networks for multidirectional microfluidic control system.
AB - We propose a continuously variable on-chip flow switcher (CVS) by utilizing vortex generations. Unlike previous no-moving-part valves, CVS can change the flow resistance to forward and backward flow with regulating the vortex generations, thereby allowing to rectify the oscillatory flow to the desired directions with variable rectification efficiency. In this presentation, we demonstrate the flow switching by constructing the microfluidic system enabling the high-speed flow control with the on-chip membrane pump. In this system, we generated continuous flow of less than 587 and 306 μl/min to forward and backward direction, respectively, by changing the amplitude/frequency of the oscillatory flow. Additionally, we achieved variable diodicity of 0.73 to 1.32 which indicated that rectification efficiencies are more than 10% in both directions. Especially, the revealed relationships between Reynolds number and diodicity offer the design strategy for constructing CVS networks for multidirectional microfluidic control system.
KW - Flow control
KW - Microvalve
KW - Vortex and Pump
UR - http://www.scopus.com/inward/record.url?scp=105001665768&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=105001665768&partnerID=8YFLogxK
U2 - 10.1109/MEMS61431.2025.10917715
DO - 10.1109/MEMS61431.2025.10917715
M3 - Conference contribution
AN - SCOPUS:105001665768
T3 - Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
SP - 220
EP - 223
BT - 2025 IEEE 38th International Conference on Micro Electro Mechanical Systems, MEMS 2025
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 38th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2025
Y2 - 19 January 2025 through 23 January 2025
ER -