Ang relative viscosity at absolute viscosity ay dalawang konsepto na naglalarawan ng lagkit ng isang likido. There are some differences between them.

Relative viscosity and absolute viscosity difference

Relatibong lagkit:

Relative viscosity is the viscosity of a fluid compared to a reference fluid (karaniwan ay isang solvent) at a given temperature. It is determined by measuring the flow properties of the fluid and the reference fluid. Relative viscosity is a dimensionless value that indicates how viscous the fluid increases relative to the reference fluid. Relative viscosity can be calculated by measuring the movement time or velocity of the fluid.

Relative viscosity and absolute viscosity difference

Ganap na lagkit:

Ang ganap na lagkit ay tumutukoy sa aktwal na lagkit ng isang likido, kilala rin bilang dynamic viscosity o dynamic viscosity. Ito ay natutukoy sa pamamagitan ng pagsukat ng lakas ng tunog (daloy ng rate) that a fluid passes through per unit area per unit time. Ang ganap na lagkit ay isang pisikal na dami na may mga yunit, usually used in units of PASCAL seconds (Mga Pa·) or millipa · second (mPa·s).

Absolute viscosity is an inherent property of fluid and can be directly used in the calculation and analysis of fluid dynamics. Relative viscosity is a comparative value with respect to a reference fluid and is often used to measure liquid mixtures and compare liquid properties.

The North and South tides remind you that the relationship between relative and absolute viscosity can be expressed by a constant called the constant of proportionality or the conversion factor between relative and absolute viscosity. Ang conversion factor na ito ay depende sa reference fluid at temperatura kondisyon na ginamit. To sum up, the relative viscosity is the comparison of the viscosity of the fluid with respect to the reference fluid, while the absolute viscosity is the physical quantity of the actual viscosity of the fluid.