Question

A fluid in which the viscosity increases with increasing stirrer speed and mixing time can be called as
A.newtonian fluid
B. pseudoplastic, thixotropic fluid
C. dilatant, rheopectic fluid
D. dilatant pseudoplastic fluid

Answer 1

hey..

the answer is B

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Answer 2

Answer:

Explanation:

Newtonian fluid

• A Newtonian fluid is one in which the local strain rate, or the rate of change of its deformation over time, is linearly connected to the viscous stresses resulting from its flow at every place. The rate at which the fluid's velocity vector changes determines how much stress is there.

Thixotropic fluid

• A thixotropic fluid is one that, when subjected to a sharp change in shear rate, requires a finite amount of time to reach equilibrium viscosity.

Dilatant fluid

• The dilatant fluid has a shear stress rise that is larger than linear, increasing viscosity as shear rate increases.
• Dilatant fluids, also known as shear-thickening fluids, are similar to pseudoplastic systems in that they don't exhibit yield stress but exhibit an apparent viscosity rise with increasing shear rate.

Pseudoplastic fluid

• Shear-thinning fluids are another name for pseudo-plastic fluids. With an increase in shear rate, these fluids' viscosity will drop.
• Pseudoplastic fluids are some thixotropic fluids that, like ketchup, nearly rapidly revert to a gel form. Some lubricants, which are rheopectic fluids, thicken or solidify when shaken.

Rheopectic fluid

• A rheopectic fluid is one in which the viscosity increases as mixing time increases.

Hence , dilatant, rheopectic fluid is the fluid which exhibits increase in viscosity as stirrer speed and mixing time increases.

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