Rheometry

Rheometry

Rheometry (from the Greek word rheos meaning stream) generically refers to the experimental techniques used to determine the rheological properties of materials, that is the quantitative and qualitative relationships between deformations and stresses and their derivatives.

The choice of the adequate experimental technique depends on the rheological property which has to be determined. This can be the steady shear viscosity, the linear viscoelastic properties (complex viscosity respectively elastic modulus), the elongational properties, etc...

For all real materials, the measured property will be a function of the flow conditions during which it is being measured (shear rate, frequency, etc...) even if for some materials this dependence is vanishingly low under given conditions (see Newtonian fluids).

Rheometry is a specific concern for smart fluids such as magnetorheological fluids and electrorheological fluids, as it is the primary method to quantify the useful properties of these materials.

ee also

*Rheometer
*Fluid mechanics
*Continuum mechanics
*Rheology
*Smart fluid
*Ferrofluid
*Magnetorheological fluid
*Electrorheological fluid


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Look at other dictionaries:

  • Rheometry — Rhe*om e*try, n. 1. The measurement of the force or intensity of currents. [1913 Webster] 2. (Math.) The calculus; fluxions. [R.] [1913 Webster] …   The Collaborative International Dictionary of English

  • rheometry — noun a) The measurement of electrical current b) The measurement of rheological properties of materials, especially by the use of a rheometer …   Wiktionary

  • rheometry — Measurement of electrical current or blood flow …   Medical dictionary

  • RHEOMETRY —    measurement of the force or the velocity of an electric current …   The Nuttall Encyclopaedia

  • rheometry — n. measurement of the velocity of a fluid current; measurement of the force of an electrical current …   English contemporary dictionary

  • rheometry — rhe·om·e·try …   English syllables

  • rheometry — noun see rheometer …   Useful english dictionary

  • Rheology — is the study of the flow of matter: mainly liquids but also soft solids or solids under conditions in which they flow rather than deform elasticallyW. R. Schowalter (1978) Mechanics of Non Newtonian Fluids Pergamon ISBN 0 08021778 8] . It applies …   Wikipedia

  • Magnetorheological fluid — Continuum mechanics …   Wikipedia

  • Rheometer — Today, a rheometer is a laboratory device used to measure the way in which a liquid, suspension or slurry flows in response to applied forces. It is used for those fluids which cannot be defined by a single value of viscosity and therefore… …   Wikipedia

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