Why isn't MatPIV fit for non-Newtonian fluids?

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SUMMARY

The MatPIV Matlab toolkit, available at http://www.math.uio.no/~jks/matpiv/, is not suitable for analyzing non-Newtonian fluids, specifically viscoplastic media. Users reported discrepancies between MatPIV results and visual inspections, where the toolkit indicated uniform flow while tracers showed localized flow near moving inclusions. This inconsistency highlights the limitations of MatPIV in capturing the complex flow behavior of non-Newtonian fluids.

PREREQUISITES
  • Understanding of non-Newtonian fluid dynamics
  • Familiarity with the MatPIV Matlab toolkit
  • Knowledge of viscoplastic material behavior
  • Experience in flow visualization techniques
NEXT STEPS
  • Research alternative tools for analyzing non-Newtonian fluids, such as OpenFOAM
  • Explore advanced techniques for flow visualization in complex fluids
  • Learn about the limitations of PIV (Particle Image Velocimetry) in non-Newtonian contexts
  • Investigate methods for characterizing viscoplastic materials in fluid dynamics
USEFUL FOR

Researchers and engineers working with fluid dynamics, particularly those focusing on non-Newtonian fluids and seeking to understand the limitations of current analysis tools like MatPIV.

dotancohen
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We are using the MatPIV Matlab toolkit:
http://www.math.uio.no/~jks/matpiv/

However, we are having trouble using the toolkit with viscoplastic media. It was expected to find a yielded region and a unyielded region, however, from the results of MatPIV it appeared that the whole area was flowing. This contradicts visual inspection of the system with tracers, in which flow was apparent only near moving inclusions. Is anyone familiar with MatPIV that might help us explain and possibly work around the problem? Thanks!
 
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Mods: On second thought, this _might_ belong in the mechanical engineering section. Is it possible to soft-link there as well? Thanks!
 

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