The role of capillaries is to explore and exploit the behavior of liquids in tiny channels. They are usually composed of long, thin tubes with an inner diameter usually ranging from micrometers to millimeters. The following are the main roles of capillaries in different fields:

Fluid mechanics research: Capillaries are often used in fluid mechanics experiments to help scientists study the behavior of liquids at the microscopic scale. . By observing the flow of liquid in a capillary tube, you can gain insights into capillary phenomena and the surface tension of liquids.

Analytical Chemistry: Capillary electrophoresis is an important analytical technique that uses electric fields in capillaries to separate and detect chemical substances. This method is widely used in fields such as drug development, environmental analysis and food testing.

Medical diagnosis: Microfluidic chips use capillary technology to perform chemical analysis and biomolecule detection of small samples. This technology is critical for rapid medical diagnosis and disease monitoring.

Energy field: Capillaries are also used in the energy field, such as for hydrogen separation and liquid transportation in fuel cells.