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A modified equivalent annulus model for the hollow fiber hemodialyzer
1Department of Mechanical Engineering, Center for Biomedical Engineering, University of Kentucky, Lexington, KY 40506, USA.
The International Journal of Artificial Organs
|April 8, 2004
Summary
Computer modeling of hemodialyzer mass transfer offers a cost-effective alternative to experiments. This validated model aids in optimizing hemodialyzer design by analyzing flow and concentration distributions.
Area of Science:
- Biomedical Engineering
- Fluid Dynamics
- Mass Transfer
Background:
- Optimizing hemodialyzer design through experimentation is costly and time-consuming.
- Computer modeling provides an efficient method to study mass transfer in hemodialyzers, reducing experimental burden.
Purpose of the Study:
- To present and validate a two-dimensional modified "equivalent annulus" model for hemodialyzer mass transfer.
- To investigate the detailed distribution of velocity, pressure, and solute concentration within the hemodialyzer.
Main Methods:
- Coupled computational fluid dynamics (CFD) using Navier-Stokes (N-S) equations for flow and Kedem-Katchalsky (K-K) equations for transmembrane flow.
- Development of a two-dimensional modified "equivalent annulus" model.
- Experimental validation of the numerical model.
Main Results:
- The coupled N-S and K-K model accurately predicted hemodialyzer mass transfer.
- Numerical results showed good agreement with experimental data.
- Detailed distributions of velocity, pressure, and solute concentration were obtained, providing insights into dialyzer performance.
Conclusions:
- The developed computational model is a viable tool for studying hemodialyzer mass transfer.
- This model can significantly aid in the optimization of hollow fiber hemodialyzer design, saving time and resources.
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