What is the meaning of thixotropic?
What is the meaning of thixotropic?
A thixotropic fluid is one that takes a fixed time to return to its equilibrium viscosity when subjected to abrupt changes in shear rate. In other words, the liquid becomes less viscous (thinner or flows more easily) when shaken, stirred, agitated or otherwise stressed.
What is thixotropic behavior?
In rheology thixotropic behavior is defined as time-dependent behavior. It means a reduction of the structural strength during a constant shear load phase and a more or less rapid but complete regeneration of the structure during the subsequent rest phase.
What is the significance of thixotropy?
Thixotropy is the term given to the reduction in resistance of sand with increased rate of shear, as opposed to dilatancy (where increasing shear force causes increased resistance). This is of particular significance for animals that burrow in sand, in that dilatancy makes burrowing impossible.
What is a Rheopectic fluid?
Rheopecty or rheopexy is the rare property of some non-Newtonian fluids to show a time-dependent increase in viscosity (time-dependent viscosity); the longer the fluid undergoes shearing force, the higher its viscosity. Rheopectic fluids, such as some lubricants, thicken or solidify when shaken.
What is thixotropic gel made of?
A thixotropic gel-like composition comprising liquid polybutadiene and an inorganic inert filler dispersed therein is adapted for use as a sealing barrier between separated phases of differing densities of a fluid in which said composition has at rest a density intermediate said differing densities, said gel-like …
What is a thixotropic index?
The thixotropic index is a ratio of the viscosity of a material at two different shear rates (low-shear viscosity/high-shear viscosity). The low-shear rate and high-shear rate are typically different by a factor of 10.
What is thixotropic and rheopectic fluid?
The key difference between thixotropic and rheopectic fluids is that in thixotropic fluids, the viscosity of the fluid decreases with stress over time whereas, in rheopectic fluids, the viscosity of the fluid increases with stress over time. Fluids are liquid or gaseous substances that have a viscosity.
What is a rheopectic fluid?
What is a thixotropic mixture?
thixotropy, reversible behaviour of certain gels that liquefy when they are shaken, stirred, or otherwise disturbed and reset after being allowed to stand. Quicksand, a mixture of sand and water, is rendered thixotropic by the presence of certain clays.
Is synovial fluid rheopectic?
Bovine synovial fluid and albumin solutions of similar concentration are rheopectic (stress increases with time in steady shear).
What liquid has a high viscosity?
A good example of viscosity is liquid flowing through a straw: water, which has a low viscosity, will flow more freely than honey, which has a high viscosity. Liquids like honey have a higher viscosity because they contain more complex molecular structures; while water consists of simple hydrogen and oxygen bonds, honey also contains sugars.
What does thixotropic mean?
Definition – What does Thixotropic mean? A thixotropic fluid is one that takes a fixed time to return to its equilibrium viscosity when subjected to abrupt changes in shear rate. In other words, the liquid becomes less viscous (thinner or flows more easily) when shaken, stirred, agitated or otherwise stressed.
What is a thixotropic index (TI)?
Definition – What does Thixotropic Index (TI) mean? This is a ratio between the slow speed viscosity to the high speed viscosity of a non-Newtonian body. It is obtained from dividing the viscosity number at low speed by the viscosity number at high speed of a given fluid.
Thixotropy occurs in paint, such as lithopone in oil, which flows freely when stirred and reverts to a gel-like state on standing. Quicksand, a mixture of sand and water, is rendered thixotropic by the presence of certain clays.
