Concepts and physics of microfluidics

To perform effective experiments in microfluidics, one needs to be aware of the different volumetric control technologies available to use the most suitable way to control microfluidic flows. This section will give you all the information regarding Microfluidic Volume Definition and Resistance, but also on the Strengths and Weaknesses of the different flow control technologies existing on the market.

Microfluidic Flow Control Technologies: Strengths and Weaknesses

To perform effective experiments in microfluidics, one needs to master the different flow control technologies available to use the most suitable way to control microfluidic flows. This article aims at presenting a short review of the existing techniques and their strengths and weaknesses.

Concepts and physics of microfluidics

Microfluidic Flow Control: Comparison between peristaltic, syringe and pressure pumps for microfluidic applications

Concepts and physics of microfluidics

Microfluidic Resistance

Microfluidic flows are characterized by the prevalence of the viscous effects compared to inertia. From a physics point of view, this behavior is pointed out by a low Reynolds number indicating laminar flow. It leads to a drastic simplification of the complex Navier-Stokes equations describing fluid displacement.

Concepts and physics of microfluidics

Microfluidic volume definitions

Most of the time, it is useful to know the total volume of one’s fluidic circuit. Volumes in microfluidics can be different from other areas. The chip has its own volume, tubing has an internal volume. Fittings like unions, adapters or tees can have an enclosed volume that will contribute to the total volume of a system. This is referred in specification sheets as “internal volume”.