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Mechanical and Electrical Engineering     
Theoretical and experimental study on capillary burst valve under centrifugal environment
SHEN Teng, WANG Jiong, HUANG Liu
College of Mechanical Engineering, Nanjing University of Science and Technology,Nanjing 210094,China
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The process of breaking through the passive valve was analyzed in order to predict the burst pressure for capillary valve based on the interfacial energy equation. The fundamentals of hydrophilic capillary valve in a rectangular microchannel were analyzed. The process of breaking through the passive valve was divided into three stages according to the different central angle on the bending surface, Then the three-dimensional (3D) theory on the burst pressure was canducted. The microfluidic chips were fabricated from layers of polymethyl methacrylate (PMMA) plastic for comparing the different burst pressure models. Experimental apparatus was developed for visualization and measurements of the liquid flow in the microfluidic chip equipped with a capillary valve. Results showed that the measurements of burst pressure for the capillary valves accorded with the predictions by the 3D theory model. The three stages can describe the process of breaking through the passive valve more reasonably.

Published: 01 August 2016
CLC:  TH 703  
  TH 134.1  
Cite this article:

SHEN Teng, WANG Jiong, HUANG Liu. Theoretical and experimental study on capillary burst valve under centrifugal environment. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2016, 50(8): 1578-1584.

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