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<front>
<journal-meta>
<journal-id journal-id-type="publisher">ARD</journal-id>
<journal-title-group>
<journal-title>Aerosol Research Discussions</journal-title>
<abbrev-journal-title abbrev-type="publisher">ARD</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">Aerosol Research Discuss.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">2940-3405</issn>
<publisher><publisher-name></publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/ar-2024-23</article-id>
<title-group>
<article-title>Impact of space charge on neutralization efficiency of highly charged aerosols: analytical and numerical insights using bipolar ions</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Ghosh</surname>
<given-names>Kunal</given-names>
<ext-link>https://orcid.org/0000-0002-3179-6844</ext-link>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Parveen</surname>
<given-names>Rukhsar</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Mayya</surname>
<given-names>Yelia Shankaranarayana</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Department of Chemical Engineering, Indian Institute of Technology Bombay, Powai 400 076, India</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>currently at: School of Earth and Environment, University of Leeds, LS2 9JT, United Kingdom</addr-line>
</aff>
<pub-date pub-type="epub">
<day>18</day>
<month>09</month>
<year>2024</year>
</pub-date>
<volume>2024</volume>
<fpage>1</fpage>
<lpage>21</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2024 Kunal Ghosh et al.</copyright-statement>
<copyright-year>2024</copyright-year>
<license license-type="open-access">
<license-p>This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit <ext-link ext-link-type="uri"  xlink:href="https://creativecommons.org/licenses/by/4.0/">https://creativecommons.org/licenses/by/4.0/</ext-link></license-p>
</license>
</permissions>
<self-uri xlink:href="https://ar.copernicus.org/preprints/ar-2024-23/">This article is available from https://ar.copernicus.org/preprints/ar-2024-23/</self-uri>
<self-uri xlink:href="https://ar.copernicus.org/preprints/ar-2024-23/ar-2024-23.pdf">The full text article is available as a PDF file from https://ar.copernicus.org/preprints/ar-2024-23/ar-2024-23.pdf</self-uri>
<abstract>
<p>We investigate the influence of space charge on aerosol discharging behavior, emphasizing its importance in understanding and optimizing aerosol neutralization processes. Our study introduces the concept of space charge-assisted ionization and the distribution of charged aerosols. Specifically, we consider the case of highly charged aerosols introduced into a cylindrical chamber containing a bipolar ion source. In this scenario, space-charge-induced motion is explicitly included in solving the dynamical equation using a computational fluid dynamics (CFD) approach. This method allows us to assess the efficacy of corona-based neutralizers for charged aerosols. Our exploration focuses on the effect of spatial ion heterogeneity induced by space charge. Our results demonstrate that the efficiency of charge neutralizers in mitigating high concentrations of charged aerosols is influenced by various factors, including aerosol charge concentration, magnitude of the charge, and design parameters such as flow rate, ion production rate, and neutralizer geometry. We observe that particles at the periphery of the chamber experience a significantly slower neutralization compared to those flowing along the axis. Consequently, the aerosol system as a whole exits the chamber with a residual charge. This incomplete neutralization, caused by space charge effects, alters the particle charge distribution, potentially affecting size distribution measurements using mobility sizing instruments. These findings underscore the need to bridge theoretical concepts with practical applications in aerosol science and technology, with broad implications for environmental monitoring and industrial processes. Furthermore, our coupled model offers potential for investigating processes involving charged aerosols in the atmosphere, where space charge effects are also significant.</p>
</abstract>
<counts><page-count count="21"/></counts>
<funding-group>
<award-group id="gs1">
<funding-source>Board of Research in Nuclear Sciences</funding-source>
<award-id>36(2,4)/15/01/2015-BRNS</award-id>
</award-group>
</funding-group>
</article-meta>
</front>
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