Influence of surface properties on the dynamics of fluid flow

Istenič, Enej (author), Šajn, Viktor (author), Brojan, Miha (author)

In this paper, we study how the fluid flow near the surface of a monocrystalline body is affected by the surface properties due to atom-surface scattering. We propose a toy model for this system by parameterizing the surface with a periodic function of the tangential position. This allows us to derive the velocity probability density function in the Knudsen layer and determine statistical averages of fluid velocity and stress tensor components in the region of interest. The results of this analysis provide a potentially more fundamental and accurate explanation for empirically observed phenomena such as the no-slip boundary condition, boundary layer formation, and the onset of hydrodynamic instability.

• Language: English
• Keywords: kinetic theory of gases, fluid flow near a wall, fluid mechanics
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: Str. 1-17
• Numbering: Vol. 34, iss. 2
• PID: 20.500.12556/RUL-134932
• UDC: 532:533
• ISSN on article: 1070-6631
• DOI: 10.1063/5.0078745
• COBISS.SI-ID: 97019651
• Publication date in RUL: 11.02.2022

Record is a part of a journal

• Title: Physics of fluids
• Shortened title: Phys. fluids
• Publisher: American Institute of Physics
• ISSN: 1070-6631
• COBISS.SI-ID: 37828865

Secondary language

• Language: Slovenian
• Keywords: kinetična teorija plinov, tok fluida ob steni, mehanika fluidov

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: J2-9223
• Name: Kristalografija nagubanih elastičnih površin

• Funder: ARRS - Slovenian Research Agency
• Project number: J2-2499
• Name: Razvoj kvazi-periodičnih deformacijskih vzorcev v viskoelastičnih strukturah