Version 1
: Received: 29 October 2024 / Approved: 29 October 2024 / Online: 29 October 2024 (13:07:03 CET)
How to cite:
Kovačič, K.; Bajt, S.; Šarler, B. Numerical Analysis of Knudsen Number of Helium Flow Through Gas-Focused Liquid Sheet Micro-Nozzle. Preprints2024, 2024102316. https://doi.org/10.20944/preprints202410.2316.v1
Kovačič, K.; Bajt, S.; Šarler, B. Numerical Analysis of Knudsen Number of Helium Flow Through Gas-Focused Liquid Sheet Micro-Nozzle. Preprints 2024, 2024102316. https://doi.org/10.20944/preprints202410.2316.v1
Kovačič, K.; Bajt, S.; Šarler, B. Numerical Analysis of Knudsen Number of Helium Flow Through Gas-Focused Liquid Sheet Micro-Nozzle. Preprints2024, 2024102316. https://doi.org/10.20944/preprints202410.2316.v1
APA Style
Kovačič, K., Bajt, S., & Šarler, B. (2024). Numerical Analysis of Knudsen Number of Helium Flow Through Gas-Focused Liquid Sheet Micro-Nozzle. Preprints. https://doi.org/10.20944/preprints202410.2316.v1
Chicago/Turabian Style
Kovačič, K., Saša Bajt and Božidar Šarler. 2024 "Numerical Analysis of Knudsen Number of Helium Flow Through Gas-Focused Liquid Sheet Micro-Nozzle" Preprints. https://doi.org/10.20944/preprints202410.2316.v1
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. The study is based on an improved definition of the numerical Knudsen number, a combination of cell Knudsen number and physical Knudsen number. In the analysis, no-slip boundary and low-pressure boundary slip conditions are compared. No significant differences are observed. The study justifies using computational fluid dynamics (CFD) analysis for SFX sample delivery systems based on the assumption of continuum mechanics.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
