Podcast
Questions and Answers
What characterizes dilatant liquids in response to increasing shear rates?
What characterizes dilatant liquids in response to increasing shear rates?
- They exhibit constant viscosity regardless of shear rate.
- Their viscosity decreases with increasing shear rate.
- They have a defined single viscosity for all shear rates.
- They become increasingly difficult to mix as shear rate increases. (correct)
Which statement describes pseudoplastic liquids?
Which statement describes pseudoplastic liquids?
- They are also known as shear-thinning liquids. (correct)
- Their viscosity increases with shear rates.
- There is a direct correlation between shear stress and shear rate.
- Pseudoplastic liquids mix more easily at lower shear rates.
Which type of fluid exhibits different viscosities based on whether the shear rate is increasing or decreasing?
Which type of fluid exhibits different viscosities based on whether the shear rate is increasing or decreasing?
- Pseudoplastic fluid
- Newtonian fluid
- Thixotropic fluid (correct)
- Dilatant fluid
What does thixotropy refer to in the context of liquids?
What does thixotropy refer to in the context of liquids?
How does a Newtonian fluid typically behave in terms of shear stress and shear rate?
How does a Newtonian fluid typically behave in terms of shear stress and shear rate?
What occurs to a thixotropic fluid when mixed at a constant shear rate for a prolonged period?
What occurs to a thixotropic fluid when mixed at a constant shear rate for a prolonged period?
What is an example of a pseudoplastic fluid mentioned in the content?
What is an example of a pseudoplastic fluid mentioned in the content?
Which of the following statements best describes hysteresis in fluid behavior?
Which of the following statements best describes hysteresis in fluid behavior?
According to rheological properties, which factor significantly influences the handling characteristics of a material?
According to rheological properties, which factor significantly influences the handling characteristics of a material?
In the context of fluid types plotted on a shear rate vs. shear stress graph, which fluid is likely to show increased viscosity with shear rate?
In the context of fluid types plotted on a shear rate vs. shear stress graph, which fluid is likely to show increased viscosity with shear rate?
Flashcards
Dilatant
Dilatant
A liquid whose viscosity increases as the shear rate increases. For example, quicksand.
Pseudoplastic (Shear-thinning)
Pseudoplastic (Shear-thinning)
A liquid whose viscosity decreases as the shear rate increases. It becomes easier to mix at higher speeds.
Thixotropic
Thixotropic
A material that exhibits a change in viscosity over time depending on the shear rate. The viscosity is lower when stirred and higher when at rest.
Newtonian liquid
Newtonian liquid
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Shear Rate
Shear Rate
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Newtonian fluids
Newtonian fluids
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Pseudoplastic fluids
Pseudoplastic fluids
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Dilatant fluids
Dilatant fluids
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Hysteresis
Hysteresis
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