Microfluidic rheometers typically employ channels with specific geometries through which the fluid is driven by pressure or electrokinetic forces. By analyzing the flow rate and pressure drop, the rheological properties of the fluid can be determined. Common techniques include:
- Pressure-Driven Flow: Fluids are pushed through microchannels using controlled pressure, and the resulting flow rate and pressure drop are measured. - Electrokinetic Flow: Electrical fields are applied to induce fluid movement, useful for fluids with ionic components.
Optical and electronic sensors integrated into the microfluidic chips provide real-time data, allowing for continuous monitoring of the rheological properties under varying conditions.
