Numerical Analysis of Elastomeric Fluidic Microvalves
We present a finite element model of polydimethylsiloxane (PDMS) fluidic microvalves. A valve is fabricated by assembling two patterned layers in a two-channel crossed architecture. The valve closes as a consequence of the motion of the interlayer membrane. The membrane is deformed by the pressure of the actuation fluid, flowing in one of the two channels. By using a soft rubber material model, we setup a numerical model of the microvalve and validate it against experiments. The numerical model allows to evaluate the mechanical engagement of commonly used microvalve architectures and to analyze the performance of alternative geometries.
© 2008 American Scientific Publishers. Received: 27 February 2007. Accepted: 27 July 2007. Publication date: 2008-02-01. Anna Pandolfi acknowledges the support of the Italian MIUR PRIN-2005 programme, "Interfacial resistance and failure in materials and structural systems." The authors wish to thank Stephen R. Quake for providing the experimental pictures.