Understanding the Rheopectic Properties of Blood: Fact or Fiction?

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SUMMARY

Blood is not classified as a rheopectic fluid; rather, it is identified as a non-Newtonian, pseudoplastic fluid. Rheopectic fluids, such as gypsum pastes and printer inks, exhibit an increase in viscosity over time under constant shear stress, a property not attributed to blood. Synovial fluid, found in joints, is an example of a rheopectic fluid, demonstrating inverse thixotropy. The discussion highlights the confusion surrounding these terms and emphasizes the lack of credible references supporting the claim that blood possesses rheopectic properties.

PREREQUISITES
  • Understanding of non-Newtonian fluid dynamics
  • Familiarity with pseudoplastic fluid behavior
  • Basic knowledge of rheology and fluid mechanics
  • Awareness of biological fluid properties, particularly synovial fluid
NEXT STEPS
  • Research the properties of non-Newtonian fluids in detail
  • Study the characteristics of pseudoplastic fluids and their applications
  • Explore the differences between rheopectic and thixotropic fluids
  • Investigate the role of synovial fluid in joint lubrication and its rheological properties
USEFUL FOR

This discussion is beneficial for students and professionals in biology, physics, and biomedical engineering, particularly those interested in fluid dynamics and the properties of bodily fluids.

Valentina Chianese
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Hello everyone, I need your help.

A teacher once told me that blood is a non-Newtonian, rheopectic, pseudo plastic fluid.
I get the non-Newtonian/pseudo plastic part, but I can't understand why blood is rheopectic...is it or not?
Thanks
 
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Valentina Chianese said:
rheopectic, pseudo plastic fluid.
Aren't those terms mutually exclusive?
You should look them up.
 
My understanding of physics is close to 0, I had serious problems with the pseudo plastic part alone so I'm not able to go further by myself...
 
Valentina Chianese said:
I can't understand why blood is rheopectic...is it or not?
What have you found with your Google searching? I found this pretty quickly, which seems to imply that blood is not but synovial fluids (lubrication in your body's joints) are:

https://en.wikipedia.org/wiki/Rheopecty
Examples of rheopectic fluids include gypsum pastes and printer inks. In the body synovial fluid exhibits the extraordinary property of inverse thixotropy or rheopexy.[2]

Besides, what survival characteristic would be a reason for blood to have this property?
 
berkeman said:
What have you found with your Google searching? I found this pretty quickly, which seems to imply that blood is not but synovial fluids (lubrication in your body's joints) are:

https://en.wikipedia.org/wiki/RheopectyBesides, what survival characteristic would be a reason for blood to have this property?
Yes I found that, it was the firts result. Also, I found absolutely nothing about blood being rheopectic, which seems to imply that it just isn't. And that's why I'm asking directly in this forum. I'm still doubtful because my comprehension of the subject is almost 0 so I have to rely on faith (faith on the absence of references about blood being rheopectic implying it isn't) or faith in the expert that told me it is. I hoped someone could explain to me in a simple manner why it is or why it isn't.
 
Valentina Chianese said:
or faith in the expert that told me it is.
Maybe ask them for a reference?
 
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