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Related Experiment Videos

Convective heat transfer coefficients in the circulation.

G S Barozzi1, A Dumas

  • 1Istituto di Fisica Tecnica, Facoltà di Ingegneria, Università di Bologna, Italy.

Journal of Biomechanical Engineering
|August 1, 1991
PubMed
Summary

Numerical simulations reveal that a cell-depleted plasma layer significantly enhances convective heat transfer in circulatory vessels. Blood

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Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Thermodynamics

Background:

  • Convective heat transfer is crucial for physiological processes within the circulatory system.
  • Understanding blood flow dynamics and its thermal properties is essential for medical applications.
  • Previous models often simplified blood rheology and ignored the plasma layer near vessel walls.

Purpose of the Study:

  • To numerically investigate convective heat transfer in blood vessels.
  • To incorporate non-Newtonian blood properties and the plasma layer into heat transfer models.
  • To quantify the impact of these factors on heat transfer rates.

Main Methods:

  • Numerical modeling of fluid flow and heat transfer.
  • Inclusion of non-Newtonian blood rheology.
  • Simulation of a cell-depleted plasma layer at the vessel wall.

Main Results:

  • The plasma layer significantly enhances heat transfer rates in small vessels.
  • Non-Newtonian blood properties have a comparatively minor effect on heat transfer.
  • Numerical findings are compared with existing experimental data.

Conclusions:

  • The plasma layer is a key factor in convective heat transfer within small blood vessels.
  • Accurate modeling of blood flow requires consideration of the plasma layer.
  • Further validation with experimental data is recommended.

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