Читать книгу The Rheology Handbook - Thomas Mezger - Страница 38

Under a constant force, the piston is moving continuously as long as the force is applied, pressing the dashpot fluid (e. g. an oil) through the narrow annular gap between the piston and the cylinder wall of the dashpot. When applying forces of differing strength to the dashpot, it can be observed in all cases: The resulting velocity of the piston is proportional the driving force. The proportionality factor corresponds to the internal friction of the fluid within the dashpot, and therefore, to the fluid’s flow resistance or viscosity, respectively.