viscosity

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Related to Viscous Force: Reynolds number, Inertial force, inertia force

viscosity

 [vis-kos´ĭ-te]
resistance to flow; a physical property of a substance that is dependent on the friction of its component molecules as they slide by one another.

vis·cos·i·ty

(vis-kos'i-tē),
In general, the resistance to flow or alteration of shape by any substance as a result of molecular cohesion; most frequently applied to liquids as the resistance of a fluid to flow because of a shearing force.
[L. viscositas, fr. viscosus, viscous]

viscosity

An MRI term for a measure of a fluid’s resistance to deformity by shear or tensile stress, which affects its mobility and therefore its intensity in an image.

viscosity

The tendency of a fluid to resist flow or the quality of resistance to flow; viscosity is measured with a viscometer to assess hyperviscosity syndromes associated with monoclonal gammopathies, rheumatoid arthritis, SLE, hyperfibrinogenemia Ref range 1.4-1.8 relative to water. See Apparent viscosity. Cf Specific gravity.

vis·cos·i·ty

(vis-kos'i-tē)
In general, the resistance to flow or alteration of shape by any substance as a result of molecular cohesion; most frequently applied to liquids as the resistance of a fluid to flow because of a shearing force.
[L. viscositas, fr. viscosus, viscous]

viscosity

  1. the property of stickiness by which substances resist change of shape.
  2. a measure of the ease with which layers of fluid pass each other.

vis·cos·i·ty

(vis-kos'i-tē)
In general, the resistance to flow or alteration of shape by any substance as a result of molecular cohesion.
[L. viscositas, fr. viscosus, viscous]
References in periodicals archive ?
Axial viscous force was also affected by viscosity of drilling mud.
The resultant friction force [F.sub.f] of the oil viscous force [F.sub.vs] and the solid shearing force [F.sub.ss] is shown in Figure 11d, in which the experimental data are also plotted.
Since the injection rate is quite low, the viscous force is weak and is unable to overcome the gravity effects; hence, some of the residual brine in the rock sample gradually replaces the injected gas at the bottom (causing a downward flow).
Number Dimensionless groups ([pi] terms) 1 [[pi].sub.1] = [DELTA][rho]gH/[DELTA]P 2 [[pi].sub.2] = [DELTA][rho]gH/[p.sub.c] 3 [[pi].sub.3] = K[DELTA][rho]g/[micro]v Number Physical meanings 1 The ratio of the gravity to driving force 2 The ratio of the gravity to capillary force 3 The ratio of the gravity to viscous force TABLE 2: Permeability and capillary force of the core.
e) finally, as it was shown earlier, the sink flow is stable at least in the axisymmetric case and the viscous forces are the main cause for the non-appearance of the swirl for the drain flow rates lower than the critical value.
First, the effect of the viscous force ratio, [a.sub.v], for [DELTA] [P.sub.g] = 0.6 is presented in Fig.
In addition to viscous force and web tension, the inertial force can also be important because a dilute bottom carrier is involved.
If the inertial force is negligible as the case of Region I, Re is small and viscous force is competing with surface tension on the establishment of a steady coating bead.
14 and 15 demonstrate the variations of fluid inertia and viscous force on the coating window.
The Reynolds number Re is a measure of the ratio of inertial force to viscous force and the Deborah number De is a measure of the ratio of elastic force to viscous force.
According to the classic lubrication theory, the pressure distribution in the annular region of a squeeze film damper is determined by using Reynolds equation, where it is assumed that the inertial forces are negligible relative to viscous forces (i.e., Re [approximately equal to] 0) [1].
Physically, it seems that for small values of Re viscous forces are dominant over the inertial forces, causing decrease in skin friction along the main flow direction, and skin friction is exerted by the plate on the fluid.