viscosity fluctuation - определение. Что такое viscosity fluctuation
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Что (кто) такое viscosity fluctuation - определение

MEASURE OF HOW VISCOSITY OF A LIQUID CHANGES WITH TEMPERATURE
Viscosity Index; Viscosity index improver; Viscosity modifiers; Viscosity modifier

Volume viscosity         
Bulk viscosity; Bulk Viscosity; Second Viscosity Coefficient; Second viscosity; Second coefficient of viscosity
Volume viscosity (also called bulk viscosity, or dilatational viscosity) is a material property relevant for characterizing fluid flow. Common symbols are \zeta, \mu', \mu_\mathrm{b}, \kappa or \xi.
Extensional viscosity         
POLYMER SOLUTION PARAMETER
Elongational viscosity
Extensional viscosity (also known as elongational viscosity) is a viscosity coefficient when applied stress is extensional stress.Barnes, H.
Quantum fluctuation         
RANDOM CHANGE IN THE ENERGY INSIDE A (TYPICALLY SUB-MICROSCOPIC) VOLUME
Vacuum fluctuations; Vacuum fluctuation; Quantum flux; Vacuum Fluctuations; Quantum Fluctuation; Quantum fluctuations; Quantum vacuum fluctuation; Quantum vacuum fluctuations; Quantum jitters; Quantum Fluctuations
In quantum physics, a quantum fluctuation (also known as a vacuum state fluctuation or vacuum fluctuation) is the temporary random change in the amount of energy in a point in space, as prescribed by Werner Heisenberg's uncertainty principle. They are minute random fluctuations in the values of the fields which represent elementary particles, such as electric and magnetic fields which represent the electromagnetic force carried by photons, W and Z fields which carry the weak force, and gluon fields which carry the strong force.

Википедия

Viscosity index

The viscosity index (VI) is an arbitrary, unit-less measure of a fluid's change in viscosity relative to temperature change. It is mostly used to characterize the viscosity-temperature behavior of lubricating oils. The lower the VI, the more the viscosity is affected by changes in temperature. The higher the VI, the more stable the viscosity remains over temperature fluctuations. The VI was originally measured on a scale from 0 to 100; however, advancements in lubrication science have led to the development of oils with much higher VIs.

The viscosity of a lubricant is closely related to its ability to reduce friction in solid body contacts. Generally, the least viscous lubricant which still forces the two moving surfaces apart to achieve "fluid bearing" conditions is desired. If the lubricant is too viscous, it will require a large amount of energy to move (as in honey); if it is too thin, the surfaces will come in contact and friction will increase.