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Related Experiment Videos

A digital model for the venous junctions.

F Cros1, P Flaud, Ph Dantan

  • 1Laboratoire de Biorhéologie et d'Hémodynamique Physico-Chimique-CNRS ESA7057-Université PARIS VII, Denis DIDEROT LBHP-Tour 33/34-2 étage-case 7056 2, place Jussieu-75251 PARIS Cedex 05, France.

Computer Methods in Biomechanics and Biomedical Engineering
|December 7, 2002
PubMed
Summary

Lower limb venous junctions cause blood flow disturbances. A new numerical model, using N3S code, accurately predicts these complex flow patterns and pressure changes.

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Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Computational Biology

Background:

  • The venous network in lower limbs features numerous confluent junctions.
  • Each junction presents unique geometry and flow rates, leading to blood flow disturbances.

Purpose of the Study:

  • To develop and validate a numerical model for analyzing blood flow dynamics at venous junctions.
  • To investigate the impact of junctional geometry and flow rates on flow disturbances and pressure gradients.

Main Methods:

  • Utilized the N3S code, a Navier-Stokes solver, to create a numerical model.
  • Validated the model by comparing numerical simulations with experimental data from ultrasonic pulsed Doppler velocimetry and differential pressure sensors.

Main Results:

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  • Numerical simulations revealed highly three-dimensional velocity fields with observed swirls.
  • Pressure evolution demonstrated a non-linear decrease, significantly influenced by confluence effects.
  • The model accurately predicted flow variables across diverse geometrical and flow configurations.

Conclusions:

  • Venous confluence effects significantly disturb pressure gradients and cannot be neglected in analysis.
  • The developed numerical tool enables accurate prediction of flow disturbances in various venous geometries and flow rates.