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Title:Numerical analysis of knudsen number of helium flow through gas-focused liquid sheet micro-nozzle
Authors:ID Kovačič, Krištof (Author)
ID Bajt, Saša (Author)
ID Šarler, Božidar (Author)
Files:.pdf PDF - Presentation file, download (4,22 MB)
MD5: 2D504A5A9ACC62751094413B06B79CFE
 
URL URL - Source URL, visit https://www.mdpi.com/2311-5521/9/12/273
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo IMT - Institute of Metals and Technology
Abstract:This work aims to verify whether the continuum mechanics assumption holds for the numerical simulation of a typical sample delivery system in serial femtosecond crystallography (SFX). Knudsen numbers were calculated based on the numerical simulation results of helium flow through the gas-focused liquid sheet nozzle into the vacuum chamber, representing the upper limit of Knudsen number for such systems. The analysed flow is considered steady, compressible, and laminar. The numerical results are mesh-independent, with a Grid Convergence Index significantly lower than 1% for global and local analysis. This study is based on an improved definition of the numerical Knudsen number: a combination of the cell Knudsen number and the physical Knudsen number. In the analysis, no-slip boundary and low-pressure boundary slip conditions are compared. No significant differences are observed. This study justifies using computational fluid dynamics (CFD) analysis for SFX sample delivery systems based on the assumption of continuum mechanics.
Keywords:Knudsen number, compressible hypersonic flow, vacuum, liquid sheet nozzle, sample delivery system, CFD
Publication status:Published
Publication version:Version of Record
Publication date:01.12.2024
Publisher:MDPI
Year of publishing:2024
Number of pages:str. 1-15
Numbering:Vol. 9, iss. 12, [art. no.] 273
Source:Švica
PID:20.500.12556/DiRROS-21005 New window
UDC:532
ISSN on article:2311-5521
DOI:10.3390/fluids9120273 New window
COBISS.SI-ID:216132867 New window
Copyright:© 2024 by the authors
Note:Nasl. z nasl. zaslona; Opis vira z dne 22. 11. 2024;
Publication date in DiRROS:17.12.2024
Views:243
Downloads:148
Metadata:XML DC-XML DC-RDF
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KOVAČIČ, Krištof, BAJT, Saša and ŠARLER, Božidar, 2024, Numerical analysis of knudsen number of helium flow through gas-focused liquid sheet micro-nozzle. Fluids [online]. 2024. Vol. 9, no. 12,  273, p. 1–15. [Accessed 21 April 2025]. DOI 10.3390/fluids9120273. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=21005
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Record is a part of a journal

Title:Fluids
Shortened title:Fluids
Publisher:MDPI AG
ISSN:2311-5521
COBISS.SI-ID:525935385 New window

Document is financed by a project

Funder:Other - Other funder or multiple funders
Funding programme:Centre for Free-Electron Laser Science (CFEL)
Name:Innovative Methods for Imaging with the use of X-ray Free-Electron Laser (XFEL) and Synchrotron Sources: Simulation of Gas-focused Micro-jets
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P2-0162
Name:Večfazni sistemi
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:J2-4477
Name:RAZVOJ INOVATIVNIH BREZMREŽNIH METOD ZA VEČFIZIKALNE IN VEČNIVOJSKE SIMULACIJE VRHUNSKIH TEHNOLOGIJ
Funder:ARIS - Slovenian Research and Innovation Agency
Funding programme:Young Researcher Program
Funder:Other - Other funder or multiple funders
Funding programme:Cluster of Excellence
Project number:EXC 2056, project ID: 390715994
Name:CUI: Advanced Imaging of Matter

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

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