Computational Fluid Dynamics Simulation of Airflow in the Normal Nasal Cavity and Paranasal Sinuses
This study aimed to investigate airflow velocity, trace, distribution, and air pressure, as well as the airflow exchange between the nasal cavity and paranasal sinus in a normal subject using computational fluid dynamics. Fluent software is used to simulate nasal cavity and paranasal sinus structure...
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| Veröffentlicht in: | American journal of rhinology Jg. 22; H. 5; S. 477 - 482 |
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| Format: | Journal Article |
| Sprache: | Englisch |
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United States
SAGE PUBLICATIONS, INC
01.09.2008
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| ISSN: | 1050-6586, 1945-8924, 1539-6290, 1945-8932 |
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| Abstract | This study aimed to investigate airflow velocity, trace, distribution, and air pressure, as well as the airflow exchange between the nasal cavity and paranasal sinus in a normal subject using computational fluid dynamics.
Fluent software is used to simulate nasal cavity and paranasal sinus structure after CT scanning of a normal adult subject. Airflow velocity, pressure, distribution, and trace lines were calculated by Navier-Stokes equation and numerically visualized.
Airflow in the common and middle meatus accounted for >50 and 30% of total nasal cavity flow. Flow velocity was maximal in the common meatus, followed by the middle meatus. Flow velocity and flux in each paranasal sinus was extremely low. The flow trace in the inferior and lower part of the common meatus was predominately straight in form. Flow was parabolic in the middle and superior meatus and the middle and upper parts of the common meatus. Air pressure was high at the front end of the inferior and middle turbinate and the uncinate process. There was little pressure difference/flow exchange between inner and outer aspects of the paranasal sinus.
The major airflow forms are straight (lower common and inferior meatus) and parabolic (middle and upper common meatus and middle superior). Flow force is strongest at the front end of the inferior and middle turbinate and uncinate process. There is very little exchange between the paranasal sinus and the nasal cavity during stable airflow. |
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| AbstractList | This study aimed to investigate airflow velocity, trace, distribution, and air pressure, as well as the airflow exchange between the nasal cavity and paranasal sinus in a normal subject using computational fluid dynamics.BACKGROUNDThis study aimed to investigate airflow velocity, trace, distribution, and air pressure, as well as the airflow exchange between the nasal cavity and paranasal sinus in a normal subject using computational fluid dynamics.Fluent software is used to simulate nasal cavity and paranasal sinus structure after CT scanning of a normal adult subject. Airflow velocity, pressure, distribution, and trace lines were calculated by Navier-Stokes equation and numerically visualized.METHODSFluent software is used to simulate nasal cavity and paranasal sinus structure after CT scanning of a normal adult subject. Airflow velocity, pressure, distribution, and trace lines were calculated by Navier-Stokes equation and numerically visualized.Airflow in the common and middle meatus accounted for >50 and 30% of total nasal cavity flow. Flow velocity was maximal in the common meatus, followed by the middle meatus. Flow velocity and flux in each paranasal sinus was extremely low. The flow trace in the inferior and lower part of the common meatus was predominately straight in form. Flow was parabolic in the middle and superior meatus and the middle and upper parts of the common meatus. Air pressure was high at the front end of the inferior and middle turbinate and the uncinate process. There was little pressure difference/flow exchange between inner and outer aspects of the paranasal sinus.RESULTSAirflow in the common and middle meatus accounted for >50 and 30% of total nasal cavity flow. Flow velocity was maximal in the common meatus, followed by the middle meatus. Flow velocity and flux in each paranasal sinus was extremely low. The flow trace in the inferior and lower part of the common meatus was predominately straight in form. Flow was parabolic in the middle and superior meatus and the middle and upper parts of the common meatus. Air pressure was high at the front end of the inferior and middle turbinate and the uncinate process. There was little pressure difference/flow exchange between inner and outer aspects of the paranasal sinus.The major airflow forms are straight (lower common and inferior meatus) and parabolic (middle and upper common meatus and middle superior). Flow force is strongest at the front end of the inferior and middle turbinate and uncinate process. There is very little exchange between the paranasal sinus and the nasal cavity during stable airflow.CONCLUSIONThe major airflow forms are straight (lower common and inferior meatus) and parabolic (middle and upper common meatus and middle superior). Flow force is strongest at the front end of the inferior and middle turbinate and uncinate process. There is very little exchange between the paranasal sinus and the nasal cavity during stable airflow. This study aimed to investigate airflow velocity, trace, distribution, and air pressure, as well as the airflow exchange between the nasal cavity and paranasal sinus in a normal subject using computational fluid dynamics. Fluent software is used to simulate nasal cavity and paranasal sinus structure after CT scanning of a normal adult subject. Airflow velocity, pressure, distribution, and trace lines were calculated by Navier-Stokes equation and numerically visualized. Airflow in the common and middle meatus accounted for >50 and 30% of total nasal cavity flow. Flow velocity was maximal in the common meatus, followed by the middle meatus. Flow velocity and flux in each paranasal sinus was extremely low. The flow trace in the inferior and lower part of the common meatus was predominately straight in form. Flow was parabolic in the middle and superior meatus and the middle and upper parts of the common meatus. Air pressure was high at the front end of the inferior and middle turbinate and the uncinate process. There was little pressure difference/flow exchange between inner and outer aspects of the paranasal sinus. The major airflow forms are straight (lower common and inferior meatus) and parabolic (middle and upper common meatus and middle superior). Flow force is strongest at the front end of the inferior and middle turbinate and uncinate process. There is very little exchange between the paranasal sinus and the nasal cavity during stable airflow. Background: This study aimed to investigate airflow velocity, trace, distribution, and air pressure, as well as the airflow exchange between the nasal cavity and paranasal sinus in a normal subject using computational fluid dynamics. Methods: Fluent software is used to simulate nasal cavity and paranasal sinus structure after CT scanning of a normal adult subject. Airflow velocity, pressure, distribution, and trace lines were calculated by Navier-Stokes equation and numerically visualized. Results: Airflow in the common and middle meatus accounted for >50 and 30% of total nasal cavity flow. Flow velocity was maximal in the common meatus, followed by the middle meatus. Flow velocity and flux in each paranasal sinus was extremely low. The flow trace in the inferior and lower part of the common meatus was predominately straight in form. Flow was parabolic in the middle and superior meatus and the middle and upper parts of the common meatus. Air pressure was high at the front end of the inferior and middle turbinate and the uncinate process. There was little pressure difference/flow exchange between inner and outer aspects of the paranasal sinus. Conclusion: The major airflow forms are straight (lower common and inferior meatus) and parabolic (middle and upper common meatus and middle superior). Flow force is strongest at the front end of the inferior and middle turbinate and uncinate process. There is very little exchange between the paranasal sinus and the nasal cavity during stable airflow. [PUBLICATION ABSTRACT] |
| Author | Li, Jian-Feng Xu, Gen Xiong, Guan-Xia Zhan, Jie-Min Jiang, Hong-Yan Rong, Liang-Wan |
| Author_xml | – sequence: 1 givenname: Guan-Xia surname: Xiong fullname: Xiong, Guan-Xia organization: Otorhinolaryngology Hospital of the First Affiliated Hospital of Sun Yat-sen University, Otorhinolaryngology Institute of Sun Yat-sen University, Guangzhou, China – sequence: 2 givenname: Jie-Min surname: Zhan fullname: Zhan, Jie-Min organization: Department of Mechanics, Sun Yat-sen University, Guangzhou, China – sequence: 3 givenname: Hong-Yan surname: Jiang fullname: Jiang, Hong-Yan organization: Otorhinolaryngology Hospital of the First Affiliated Hospital of Sun Yat-sen University, Otorhinolaryngology Institute of Sun Yat-sen University, Guangzhou, China – sequence: 4 givenname: Jian-Feng surname: Li fullname: Li, Jian-Feng organization: Department of Mechanics, Sun Yat-sen University, Guangzhou, China – sequence: 5 givenname: Liang-Wan surname: Rong fullname: Rong, Liang-Wan organization: Department of Mechanics, Sun Yat-sen University, Guangzhou, China – sequence: 6 givenname: Gen surname: Xu fullname: Xu, Gen organization: Otorhinolaryngology Hospital of the First Affiliated Hospital of Sun Yat-sen University, Otorhinolaryngology Institute of Sun Yat-sen University, Guangzhou, China |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/18954506$$D View this record in MEDLINE/PubMed |
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| Cites_doi | 10.1177/194589240602000220 10.1098/rsta.2002.0990 10.1080/00016480500361320 10.1152/japplphysiol.01118.2006 10.1016/j.otohns.2004.04.010 10.1046/j.1365-2281.2001.00312.x 10.1007/s00405-003-0675-y 10.2500/ajr.2006.20.2848 10.1097/00005537-200406000-00015 10.1007/BF00491466 10.1007/BF02441806 10.2500/ajr.2006.20.2890 10.1093/chemse/bjh033 10.2500/105065800779954383 10.1115/1.2794204 10.1007/s10439-006-9094-8 10.1080/089583798197772 10.1001/archotol.132.11.1203 10.1152/jappl.2000.89.1.323 |
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| SubjectTerms | Adult Air Computer Simulation Female Humans Image Interpretation, Computer-Assisted - methods Nasal Cavity - anatomy & histology Nasal Cavity - physiology Paranasal Sinuses - anatomy & histology Paranasal Sinuses - physiology Pulmonary Ventilation - physiology Reference Values Tomography, X-Ray Computed |
| Title | Computational Fluid Dynamics Simulation of Airflow in the Normal Nasal Cavity and Paranasal Sinuses |
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