Air transport properties in the human respiratory system by using numerical simulation

Abstract

This paper considers air transport in the human respiratory system with the numerical simulation. Investigation of air flow in the human nasal cavity is of considerable interest, since breathing is done mainly through the nose. Nasal breathing is important to maintain the internal environment of lung, as the ambient temperature becomes alveolar conditions when the nasopharynx. In this study conducted a two-dimensional numerical simulation of air transport in the model cross-sections of the nasal cavity to normal human nose, which based on the Navier-Stokes equations, the equations for temperature and equation for relative humidity. For the numerical solution of this system of equations is used projection method. The obtained data transfer numerical modeling air human nasal cavity were verified with known numerical results in the form of velocity and temperature profiles. Numerical modeling results show that with normal breathing through a human nose have enough time to heat and water exchange to achieve intraalveolar state. The nasal cavity accelerates heat by narrowing the air passages and twists of the turbinates walls of the inner cavity.