Detailed flow patterns in the nasal cavity

Detailed flow patterns in the nasal cavity.

The human nasal cavity filters and conditions inspired air while providing olfactory function. Detailed experimental study of nasal airflow patterns has been limited because of the complex geometry of the nasal cavity. In this work, particle image velocimetry was used to determine two-dimensional instantaneous velocity vector fields in parallel planes throughout a model of the nasal cavity that...

Relation of nasal air flow to nasal cavity dimensions.

OBJECTIVE To investigate the relationship between nasal cavity dimensions and airflow based on measures of acoustic rhinometry (AR) and peak nasal inspiratory flow (PNIF) in a very large sample of mixed rhinologic and nonrhinologic patients. DESIGN Clinical survey conducted between 2001 and 2007. SETTING Secondary referral ambulatory center and hospital. PATIENTS The study population comp...

Stone in the Nasal Cavity

Acoustic Analysis of Detailed Three-Dimensional Shape of the Human Nasal Cavity and Paranasal Sinuses

The nasal and paranasal cavities have a labyrinthine shape and their acoustic properties affect speech sounds. In this study, we explored the transfer function of the nasal and paranasal cavities, as well as the contribution of each paranasal cavity, using acoustical and numerical methods. A physical model of the nasal and paranasal cavities was formed using data from a highresolution 3D X-ray ...

the effects of changing roughness on the flow structure in the bends

flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...