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Computation of the boundary conditions for diffusion in the human lung

✍ Scribed by Manuel Paiva

Publisher
Elsevier Science
Year
1972
Tongue
English
Weight
540 KB
Volume
5
Category
Article
ISSN
0010-4809

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✦ Synopsis

The main difficulty in finding the solution of the diffusion equation in the human lung lies in the extreme complexity of the boundary conditions. Furthermore, the role played by the alveolar walls has never been studied before.

We have constructed, from anatomical data, the boundary conditions and obtained the solution of the transport equation. We analyze the role played by diffusional and convectional transport and, based on this, interpret the single-breath test and the nitrogen wash-out.

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Computational Β―uid dynamics simulations often require the imposition of slip boundary conditions: zero-normal velocity. When the geometry is complex, the imposition of this type of boundary condition is not trivial since the current implementations require the computation of consistent normals. The