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@ARTICLE{Kovai:615592,
      author       = {Kovačič, Krištof and Bajt, Sasa and Sarler, Bozidar},
      title        = {{N}umerical analysis of {K}nudsen number of helium flow
                      through gas-focused liquid sheet micro-nozzle},
      journal      = {Fluids},
      volume       = {9},
      number       = {12},
      issn         = {2311-5521},
      address      = {Belgrade},
      publisher    = {MDPI},
      reportid     = {PUBDB-2024-06199},
      pages        = {273},
      year         = {2024},
      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
                      signifi-cantly 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
                      com-pared. No significant differences are observed. The
                      study justifies using computational fluid dy-namics (CFD)
                      analysis for SFX sample delivery systems based on the
                      assumption of continuum mechanics.},
      cin          = {FS-ML},
      ddc          = {530},
      cid          = {I:(DE-H253)FS-ML-20120731},
      pnm          = {633 - Life Sciences – Building Blocks of Life: Structure
                      and Function (POF4-633) / DFG project G:(GEPRIS)390715994 -
                      EXC 2056: CUI: Advanced Imaging of Matter (390715994) / DFG
                      project G:(GEPRIS)194651731 - EXC 1074: Hamburger Zentrum
                      für ultraschnelle Beobachtung (CUI): Struktur, Dynamik und
                      Kontrolle von Materie auf atomarer Skala (194651731)},
      pid          = {G:(DE-HGF)POF4-633 / G:(GEPRIS)390715994 /
                      G:(GEPRIS)194651731},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001392345600001},
      doi          = {10.3390/fluids9120273},
      url          = {https://bib-pubdb1.desy.de/record/615592},
}