Abonnement à la biblothèque: Guest

A Porous Medium Model of Alveolar Gas Diffusion

Volume 2, Numéro 3, 1999, pp. 263-275
DOI: 10.1615/JPorMedia.v2.i3.40
Get accessGet access

RÉSUMÉ

A mathematical model based on the volume-averaging technique is derived for simulating the diffusion process within the alveolar region of the lung. The derivation of this macroscopic model leads to a lung effective diffusivity that depends on the diffusivity and on the interface geometry of each alveolar constituent. Unfortunately, describing the internal geometry of the alveolar region for estimating the lung effective diffusivity is impractical. We found, however, that the steady-state solution of the macroscopic model can be used to obtain the lung effective diffusivity once the lung diffusing capacity is known. A preliminary investigation considering a hypothetical cubic domain representing the alveolar region of the lung is undertaken for demonstrating the applicability of the method. Using characteristic values of capillary red blood cell density, alveolar volume, and lung diffusing capacity, the representative lung effective diffusivity is computed and satisfactorily compared with the molecular diffusivity of each constituent of the alveolar region.

CITÉ PAR
  1. Nakayama Akira, Kuwahara Fujio, Sano Yoshihiko, Why do we have a bronchial tree with 23 levels of bifurcation?, Heat and Mass Transfer, 45, 3, 2009. Crossref

  2. Kuwahara Fujio, Sano Yoshihiko, Liu Jianjun, Nakayama Akira, A Porous Media Approach for Bifurcating Flow and Mass Transfer in a Human Lung, Journal of Heat Transfer, 131, 10, 2009. Crossref

  3. Kulish Vladimir V. , Lage Jose´ L. , Hsia Connie C. W. , Johnson, Robert L. , Three-dimensional, Unsteady Simulation of Alveolar Respiration , Journal of Biomechanical Engineering, 124, 5, 2002. Crossref

  4. Lage J. L., Merrikh A. A., Kulish V. V., A Porous Medium Model to Investigate the Red Cell Distribution Effect on Alveolar Respiration, in Emerging Technologies and Techniques in Porous Media, 2004. Crossref

  5. Lage José L., New Bio-Inspired Multiphase Thermal Functional Fluid, in Heat Transfer in Multi-Phase Materials, 2, 2011. Crossref

Prochains articles

ON THERMAL CONVECTION IN ROTATING CASSON NANOFLUID PERMEATED WITH SUSPENDED PARTICLES IN A DARCY-BRINKMAN POROUS MEDIUM Pushap Sharma, Deepak Bains, G. C. Rana Effect of Microstructures on Mass Transfer inside a Hierarchically-structured Porous Catalyst Masood Moghaddam, Abbas Abbassi, Jafar Ghazanfarian Insight into the impact of melting heat transfer and MHD on stagnation point flow of tangent hyperbolic fluid over a porous rotating disk Priya Bartwal, Himanshu Upreti, Alok Kumar Pandey Numerical Simulation of 3D Darcy-Forchheimer Hybrid Nanofluid Flow with Heat Source/Sink and Partial Slip Effect across a Spinning Disc Bilal Ali, Sidra Jubair, Md Irfanul Haque Siddiqui Fractal model of solid-liquid two-phase thermal transport characteristics in the rough fracture network shanshan yang, Qiong Sheng, Mingqing Zou, Mengying Wang, Ruike Cui, Shuaiyin Chen, Qian Zheng Application of Artificial Neural Network for Modeling of Motile Microorganism-Enhanced MHD Tangent Hyperbolic Nanofluid across a vertical Slender Stretching Surface Bilal Ali, Shengjun Liu, Hongjuan Liu Estimating the Spreading Rates of Hazardous Materials on Unmodified Cellulose Filter Paper: Implications on Risk Assessment of Transporting Hazardous Materials Heshani Manaweera Wickramage, Pan Lu, Peter Oduor, Jianbang Du ELASTIC INTERACTIONS BETWEEN EQUILIBRIUM PORES/HOLES IN POROUS MEDIA UNDER REMOTE STRESS Kostas Davanas Gravity modulation and its impact on weakly nonlinear bio-thermal convection in a porous layer under rotation: a Ginzburg-Landau model approach Michael Kopp, Vladimir Yanovsky Pore structure and permeability behavior of porous media under in-situ stress and pore pressure: Discrete element method simulation on digital core Jun Yao, Chunqi Wang, Xiaoyu Wang, Zhaoqin Huang, Fugui Liu, Quan Xu, Yongfei Yang Influence of Lorentz forces on forced convection of Nanofluid in a porous lid driven enclosure Yi Man, Mostafa Barzegar Gerdroodbary SUTTERBY NANOFLUID FLOW WITH MICROORGANISMS AROUND A CURVED EXPANDING SURFACE THROUGH A POROUS MEDIUM: THERMAL DIFFUSION AND DIFFUSION THERMO IMPACTS galal Moatimid, Mona Mohamed, Khaled Elagamy CHARACTERISTICS OF FLOW REGIMES IN SPIRAL PACKED BEDS WITH SPHERES Mustafa Yasin Gökaslan, Mustafa Özdemir, Lütfullah Kuddusi Numerical study of the influence of magnetic field and throughflow on the onset of thermo-bio-convection in a Forchheimer‑extended Darcy-Brinkman porous nanofluid layer containing gyrotactic microorganisms Arpan Garg, Y.D. Sharma, Subit K. Jain, Sanjalee Maheshwari A nanofluid couple stress flow due to porous stretching and shrinking sheet with heat transfer A. B. Vishalakshi, U.S. Mahabaleshwar, V. Anitha, Dia Zeidan ROTATING WAVY CYLINDER ON BIOCONVECTION FLOW OF NANOENCAPSULATED PHASE CHANGE MATERIALS IN A FINNED CIRCULAR CYLINDER Noura Alsedais, Sang-Wook Lee, Abdelraheem Aly Porosity Impacts on MHD Casson Fluid past a Shrinking Cylinder with Suction Annuri Shobha, Murugan Mageswari, Aisha M. Alqahtani, Asokan Arulmozhi, Manyala Gangadhar Rao, Sudar Mozhi K, Ilyas Khan CREEPING FLOW OF COUPLE STRESS FLUID OVER A SPHERICAL FIELD ON A SATURATED BIPOROUS MEDIUM Shyamala Sakthivel , Pankaj Shukla, Selvi Ramasamy
Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections Prix et politiques d'abonnement Begell House Contactez-nous Language English 中文 Русский Português German French Spain