Working principle of Ubbelohde viscometer

When a fluid flows under external force, there is tangential internal friction between the flowing liquid layers. To make the liquid pass through the pipe, a portion of the work must be consumed to overcome this flow resistance. When the flow rate is low, the liquid in the pipe advances along a straight line parallel to the pipe wall, and the liquid closest to the pipe wall is actually stationary. The farther away from the pipe wall, the greater the flow velocity.

Common materials tested for viscosity using the Ubbelohde viscometer method

For more viscosity tests of materials, please pay attention to Zhongwang Technology official account