viscosity

Examples of viscosity in the following topics:

• Viscosity

  • The units of viscosity in the SI system are $N \cdot sec /m^2$ (or $Pa \cdot sec$ ).
  • When measuring viscosity, strain is applied at a certain rate, called shear rate.
  • Fluids that display a constant viscosity over a range of shear rates are called Newtonian, while those with a non-constant viscosity are non-Newtonian.
  • We can see that viscosity is highly dependent on temperature.
  • Therefore, we say water is thin, having a low viscosity, while honey is thick, having a high viscosity.

• Properties of Sulfur

  • Again, this is accompanied by a lower density but increased viscosity due to the formation of polymers.
  • At even higher temperatures, however, the viscosity decreases as depolymerization occurs.

• Polysaccharides

  • Viscose Rayon, is prepared by formation of an alkali soluble xanthate derivative that can be spun into a fiber that reforms the cellulose polymer by acid quenching.
  • The product fiber is called viscose rayon.

• Supercritical Fluids

  • Table 2 shows density, diffusivity, and viscosity for typical liquids, gases, and supercritical fluids.
  • Many other physical properties also show large gradients with pressure near the critical point, such as viscosity, the relative permittivity, and the solvent strength, which are all closely related to the density.

• Experimental Determination of Reaction Rates

  • Other methods include thermal conductivity, viscosity, heats of reaction, and freezing points.

• Conjugated π-Orbital Functions

  • The torsional movement in this change is sensitive to the viscosity of the solution and to other structural constraints that may exist.

• Gas Diffusion and Effusion

  • The rate of this movement is a function of temperature, viscosity of the medium, and the size (mass) of the particles.