Numerical study of the transport of droplets or particles generated by respiratory system indoors
Identifieur interne : 000E65 ( Pmc/Curation ); précédent : 000E64; suivant : 000E66Numerical study of the transport of droplets or particles generated by respiratory system indoors
Auteurs : Bin Zhao ; Zhao Zhang ; Xianting LiSource :
- Building and Environment [ 0360-1323 ] ; 2004.
Abstract
The outbreak of atypical pneumonia, referred to as severe acute respiratory syndrome (SARS), has spread to many countries in the world. SARS may infect human bodies by the tiny droplets or particles carrying various virus and bacteria, which are generated by the respiratory system of infected patients. This paper presents the numerical analysis of the influence of generating ways of the droplets or particles on the transport and distribution of the droplets or particles indoors. The drift flux model, which considers the settling of particles or droplets under the effect of gravitational sedimentation, is adopted to simulate the droplets transport and distribution indoors during respiration and sneezing or coughing process, while the simplified model for solving the continuous fluid flow is combined. Two different cases considering the normal respiration and coughing or sneezing are studied, respectively, and two different outlet velocities from the mouth for the sneezing or coughing process are considered. The results show that droplets or particles generated by normal breathing process transport a relatively short distance, while droplets or particles generated during coughing or sneezing may travel much longer distances, which may pose adverse effect on human bodies for defending the SARS or other infectious diseases.
Url:
DOI: 10.1016/j.buildenv.2004.09.018
PubMed: NONE
PubMed Central: 7117002
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SARS may infect human bodies by the tiny droplets or particles carrying various virus and bacteria, which are generated by the respiratory system of infected patients. This paper presents the numerical analysis of the influence of generating ways of the droplets or particles on the transport and distribution of the droplets or particles indoors. The drift flux model, which considers the settling of particles or droplets under the effect of gravitational sedimentation, is adopted to simulate the droplets transport and distribution indoors during respiration and sneezing or coughing process, while the simplified model for solving the continuous fluid flow is combined. Two different cases considering the normal respiration and coughing or sneezing are studied, respectively, and two different outlet velocities from the mouth for the sneezing or coughing process are considered. The results show that droplets or particles generated by normal breathing process transport a relatively short distance, while droplets or particles generated during coughing or sneezing may travel much longer distances, which may pose adverse effect on human bodies for defending the SARS or other infectious diseases.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Hinds, W C" uniqKey="Hinds W">W.C. Hinds</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Zhao, B" uniqKey="Zhao B">B. Zhao</name></author><author><name sortKey="Li, X" uniqKey="Li X">X. Li</name></author><author><name sortKey="Yan, Q" uniqKey="Yan Q">Q. Yan</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Chen, Q" uniqKey="Chen Q">Q. Chen</name></author><author><name sortKey="Xu, W" uniqKey="Xu W">W. Xu</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Murakami, S" uniqKey="Murakami S">S. Murakami</name></author><author><name sortKey="Kato, S" uniqKey="Kato S">S. Kato</name></author><author><name sortKey="Nagano, S" uniqKey="Nagano S">S. Nagano</name></author><author><name sortKey="Tanaka, Y" uniqKey="Tanaka Y">Y. Tanaka</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Holmberg, S" uniqKey="Holmberg S">S. Holmberg</name></author><author><name sortKey="Li, Y" uniqKey="Li Y">Y. Li</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Elghobashi, S" uniqKey="Elghobashi S">S. Elghobashi</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Nazaroff, W W" uniqKey="Nazaroff W">W.W. Nazaroff</name></author><author><name sortKey="Cass, G R" uniqKey="Cass G">G.R. Cass</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Patankar, S V" uniqKey="Patankar S">S.V. Patankar</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Brown, B H" uniqKey="Brown B">B.H. Brown</name></author><author><name sortKey="Smallwood, R H" uniqKey="Smallwood R">R.H. Smallwood</name></author><author><name sortKey="Barber, D C" uniqKey="Barber D">D.C. Barber</name></author><author><name sortKey="Lawford, P V" uniqKey="Lawford P">P.V. Lawford</name></author><author><name sortKey="Hose, D R" uniqKey="Hose D">D.R. Hose</name></author></analytic></biblStruct><biblStruct></biblStruct></listBibl></div1></back></TEI><pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Build Environ</journal-id><journal-id journal-id-type="iso-abbrev">Build Environ</journal-id><journal-title-group><journal-title>Building and Environment</journal-title></journal-title-group><issn pub-type="ppub">0360-1323</issn><issn pub-type="epub">1873-684X</issn><publisher><publisher-name>Elsevier Ltd.</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmc">7117002</article-id><article-id pub-id-type="publisher-id">S0360-1323(04)00303-8</article-id><article-id pub-id-type="doi">10.1016/j.buildenv.2004.09.018</article-id><article-categories><subj-group subj-group-type="heading"><subject>Article</subject></subj-group></article-categories><title-group><article-title>Numerical study of the transport of droplets or particles generated by respiratory system indoors</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Zhao</surname><given-names>Bin</given-names></name><email>Zhaobin@tsinghua.org.cn</email><xref rid="cor1" ref-type="corresp">*</xref></contrib><contrib contrib-type="author"><name><surname>Zhang</surname><given-names>Zhao</given-names></name></contrib><contrib contrib-type="author"><name><surname>Li</surname><given-names>Xianting</given-names></name></contrib></contrib-group><aff>Department of Building Science, School of Architecture, Tsinghua University, Beijing 100084, PR China</aff><author-notes><corresp id="cor1"><label>*</label>Corresponding author. Tel.: +86 10 627 79995; fax: +86 10 627 73461. <email>Zhaobin@tsinghua.org.cn</email></corresp></author-notes><pub-date pub-type="pmc-release"><day>24</day><month>11</month><year>2004</year></pub-date><pmc-comment> PMC Release delay is 0 months and 0 days and was based on .</pmc-comment>
<pub-date pub-type="ppub"><month>8</month><year>2005</year></pub-date><pub-date pub-type="epub"><day>24</day><month>11</month><year>2004</year></pub-date><volume>40</volume><issue>8</issue><fpage>1032</fpage><lpage>1039</lpage><history><date date-type="received"><day>19</day><month>3</month><year>2003</year></date><date date-type="rev-recd"><day>27</day><month>9</month><year>2004</year></date><date date-type="accepted"><day>28</day><month>9</month><year>2004</year></date></history><permissions><copyright-statement>Copyright © 2004 Elsevier Ltd. All rights reserved.</copyright-statement><copyright-year>2004</copyright-year><copyright-holder>Elsevier Ltd</copyright-holder><license><license-p>Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.</license-p></license></permissions><abstract><p>The outbreak of atypical pneumonia, referred to as severe acute respiratory syndrome (SARS), has spread to many countries in the world. SARS may infect human bodies by the tiny droplets or particles carrying various virus and bacteria, which are generated by the respiratory system of infected patients. This paper presents the numerical analysis of the influence of generating ways of the droplets or particles on the transport and distribution of the droplets or particles indoors. The drift flux model, which considers the settling of particles or droplets under the effect of gravitational sedimentation, is adopted to simulate the droplets transport and distribution indoors during respiration and sneezing or coughing process, while the simplified model for solving the continuous fluid flow is combined. Two different cases considering the normal respiration and coughing or sneezing are studied, respectively, and two different outlet velocities from the mouth for the sneezing or coughing process are considered. The results show that droplets or particles generated by normal breathing process transport a relatively short distance, while droplets or particles generated during coughing or sneezing may travel much longer distances, which may pose adverse effect on human bodies for defending the SARS or other infectious diseases.</p></abstract></article-meta></front></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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