viscosity reducer - ορισμός. Τι είναι το viscosity reducer
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Τι (ποιος) είναι viscosity reducer - ορισμός

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.
viscous         
  • Experiment showing the behavior of a viscous fluid with blue dye for visibility
  • 2007}}
  • Illustration of a planar [[Couette flow]]. Since the shearing flow is opposed by friction between adjacent layers of fluid (which are in relative motion), a force is required to sustain the motion of the upper plate. The relative strength of this force is a measure of the fluid's viscosity.
  • In a general parallel flow, the shear stress is proportional to the gradient of the velocity.
  • [[Honey]] being drizzled
  • pp=198–200}}
  • Video showing three liquids with different viscosities
  • Viscosity, the slope of each line, varies among materials.
RESISTANCE OF A FLUID TO SHEAR DEFORMATION
Viscousity; Viscous; Dynamic viscosity; Kinematic viscosity; Coefficient of viscosity; Eddy viscosity; Inviscid; Stokes (unit); Pascal second; Kinematic Viscosity; Shear viscosity; Pascal-second; Dynamic Viscosity; Shear Viscosity; Eddy Viscosity; Viscous friction; Centistoke; Millipoiseuille; Inviscid fluids; Viscous Force; Viscosity of amorphous materials; Viscous forces; Pa·s; Absolute viscosity; Pa*s; Viscocity; Dynamic kinematic viscosity; Centistokes; Sutherland's formula; Viscous shear; Coefficient of Viscosity; Rhe; Orders of magnitude (viscosity); Viscosities; Consistency - thickness, viscosity; Viscometric; Trouton's ratio (rheology); Trouton ratio
['v?sk?s]
¦ adjective having a thick, sticky consistency between solid and liquid; having a high viscosity.
Derivatives
viscously adverb
viscousness noun
Origin
ME: from Anglo-Norman Fr. viscous or late L. viscosus, from L. viscum 'birdlime'.

Βικιπαίδεια

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.