Heat and Water Rate Transfer Processes in the Human Respiratory Tract at Various Altitudes

Kandjov, Iwajlo M.

doi:10.1006/jtbi.2000.2217

Cited by 4 publications

(2 citation statements)

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“…The first and most simple approach is empirical or lumped model approach in which correlations or 0-dimensional models are used to analyse the heat exchange. 2,[11][12][13] Although the lumped model is useful to study experimental measurements and simple scenarios, it is not a robust model for predicting temperature distribution in space and time. A more robust model may be constructed using a 1-dimensional tree with fluid-structure interaction models 14,15 similar to blood flow analysis.…”

Section: Introductionmentioning

confidence: 99%

“…A computational model of respiratory tract may be developed using 3 different approaches. The first and most simple approach is empirical or lumped model approach in which correlations or 0‐dimensional models are used to analyse the heat exchange . Although the lumped model is useful to study experimental measurements and simple scenarios, it is not a robust model for predicting temperature distribution in space and time.…”

Section: Introductionmentioning

confidence: 99%

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A novel modelling approach to energy transport in a respiratory system

Nithiarasu

Sazonov

2017

Numer Methods Biomed Eng

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In this paper, energy transport in a respiratory tract is modelled using the finite element method for the first time. The upper and lower respiratory tracts are approximated as a 1-dimensional domain with varying cross-sectional and surface areas, and the radial heat conduction in the tissue is approximated using the 1-dimensional cylindrical coordinate system. The governing equations are solved using 1-dimensional linear finite elements with convective and evaporative boundary conditions on the wall. The results obtained for the exhalation temperature of the respiratory system have been compared with the available animal experiments. The study of a full breathing cycle indicates that evaporation is the main mode of heat transfer, and convection plays almost negligible role in the energy transport. This is in-line with the results obtained from animal experiments.

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