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Viscosity print that page


Viscosity describes a fluid's internal resistance to flow and may be thought of as a measure of fluid friction . For example, high viscosity felsic magma will create a tall, steep stratovolcano , because it cannot flow far before it cools, while low viscosity mafic lava will create a wide

Volume viscosity print that page

to the divergence of the velocity field. This constant of proportionality is called the volume viscosity . Volume viscosity appears in the Navier-Stokes equation if it is written for compressible fluid , as described in the most books on general hydrodynamics [ 1 ] , [ 2 ] , and acoustics | 2010/9/26 13:47:32

Intrinsic viscosity print that page

where η 0 is the viscosity in the absence of the solute and φ is the volume fraction of the solute in the solution. As defined here, the intrinsic viscosity is a dimensionless number. When the solute particles are rigid spheres , the intrinsic viscosity equals 2.5, as shown first by | 2011/3/4 8:10:37

Blood viscosity print that page

In pascal - seconds (Pa·s), the viscosity of blood at 37°C is normally 3*10 -3 to 4*10 -3 . [ 4 ] The analogous unit in the centimetre gram second system of units is Poise , and the viscosity of blood at 20°C is normally 10 centipoise (cP). [ 5 ] Plasma viscosity is determined by | 2011/2/23 20:52:14

Viscosity solution print that page

In mathematics , the viscosity solution concept was introduced in the early 1980s by Pierre-Louis Lions and Michael Crandall as a generalization of the classical concept of what is meant by a 'solution' to a partial differential equation (PDE). It has been found that the viscosity solution | 2011/5/25 18:35:22

Extensional viscosity print that page

where is the extensional viscosity or elongational viscosity is the normal stress : is the rate of strain : For a Newtonian Fluid , the elongational viscosity is three times the shear viscosity which can be derived using the continuity equation for incompressible fluids. | 2010/9/25 2:53:40

Viscosity printing print that page

Three to four colors of ink are mixed, each of a different viscosity . This property is adjusted by the addition of solvents such as linseed oil. Metal plates, usually copper or zinc, are used, as in the intaglio processes. The artist produces images on the plate by etching lines or textures | 2011/2/26 1:02:07

Viscosity of amorphous materials print that page


[ 1 ] [ 2 ] [ 3 ] is a thermally activated process: where Q is the activation energy of viscosity , T is temperature, R is the molar gas constant and A is approximately a constant. The viscous flow in amorphous materials is characterised by a deviation from the Arrhenius-type behaviour

Viscosity index print that page

The viscosity of liquids decreases as temperature increases. The viscosity of a lubricant is closely related to its ability to reduce friction . Generally, the least viscous lubricant which still forces the two moving surfaces apart is desired. If the lubricant is too viscous, it will | 2011/5/26 17:22:52

Apparent viscosity print that page

For this article, apparent viscosity is described, as used in drilling fluid applications in the Oil exploration industry . There may be other applications in other fields of study such as fluid mechanics (The study of the movement of fluid) or fluid dynamics (The study of the flow of fluid | 2010/9/25 5:13:22