Highly Non-linear Microfluidic Resistor Elements for Flow Rate-dependent Addressing of Microchannels
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Luke Rajah
Abstract
We have developed a microfluidic resistor element exhibiting a hydrodynamic resistance that is strongly dependent on the pressure at the inlet of the device. Such an element can be used to construct microfluidic circuits that possess a highly non-linear dependence between the pressure and the flow rate, in contrast to conventional microfluidic resistors. We show that this effect can be exploited to create valves which do not require an external control line, but are actuated directly through the pressure difference between the single inlet and outlet of the device. Furthermore, we show that the flux to each branch of the circuit controlled by the valve can be fixed for high or low flow rates by modifying the fixed resistances internal to the device.
©2012 by De Gruyter
Articles in the same Issue
- Frontmatter
- CD4+ T Cell Counting by Impedance Measurement on a Chip with Fluidic Electrodes
- Highly Non-linear Microfluidic Resistor Elements for Flow Rate-dependent Addressing of Microchannels
- Microfluidic Preparation of Multicompartment Microcapsules for Isolated Co-encapsulation and Controlled Release of Diverse Components
- Joule Heating Effect in Constant Voltage Mode Isotachophoresis in a Microchannel
- Cavitation in Negative-pressure Microcapillary Devices with Tapered Constrictions: Experiment and Numerical Simulation
- Beating the Jetting Regime
Articles in the same Issue
- Frontmatter
- CD4+ T Cell Counting by Impedance Measurement on a Chip with Fluidic Electrodes
- Highly Non-linear Microfluidic Resistor Elements for Flow Rate-dependent Addressing of Microchannels
- Microfluidic Preparation of Multicompartment Microcapsules for Isolated Co-encapsulation and Controlled Release of Diverse Components
- Joule Heating Effect in Constant Voltage Mode Isotachophoresis in a Microchannel
- Cavitation in Negative-pressure Microcapillary Devices with Tapered Constrictions: Experiment and Numerical Simulation
- Beating the Jetting Regime
