Analyzing the Effects of Key Design Factors of a Negative-Differential-Resistance(NDR)Microfluidic Oscillator–an Equivalent-Circuit-Model Approach  

作　　者：J.W.Wu H.M.Xia Z.P.Wang W.Wang H.J.Du 

机构地区：[1]School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing,Jiangsu 210094,China [2]Singapore Institute of Manufacturing Technology,73 Nanyang Drive,Singapore 637662,Singapore [3]School of Mechanical and Aerospace Engineering,Nanyang Technological University,50 Nanyang Avenue,Singapore 639798,Singapore

出　　处：《Advances in Applied Mathematics and Mechanics》2022年第6期1381-1399,共19页应用数学与力学进展（英文）

基　　金：the National Natural Science Foundation of China(No.51575282);the Fundamental Research Funds for the Central Universities(Nos.30915118803 and 30916012101);Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX200266);Nanyang Technological University and Singapore Institute of Manufacturing Technology,under the Agency for Science,Technology and Research(A*STAR,Singapore).

摘　　要：Numerical study on dynamic hydroelastic problems is usually rather complex due to the coupling of fluid and solid mechanics.Here,we demonstrate that the performance of a hydroelastic microfluidic oscillator can be analyzed using a simple equivalent circuit model.Previous studies reveal that its transition from the steady state to the oscillation state follows the negative-differential-resistance(NDR)mechanism.The performance is mainly determined by a bias fluidic resistor,and a pressurevariant resistor which further relates to the bending stiffness of the elastic diaphragm and the depth of the oscillation chamber.In this work,a numerical study is conducted to examine the effects of key design factors on the device robustness,the applicable fluid viscosity,the flow rate,and the transition pressure.The underlying physics is interpreted,providing a new perspective on hydroelastic oscillation problems.Relevant findings also provide design guidelines of the NDR fluidic oscillator.

关 键 词：Microfluidic oscillator hydroelastics equivalent circuit model negative differential resistance 

分 类 号：TN752[电子电信—电路与系统]