Analytical solution of plane Poiseuille flow within Burnett hydrodynamics

Narendara Singh, Nishanth Dongari, Amit Agrawal

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

In the current paper, low-speed isothermal microscale gas flows have been investigated utilizing the augmented Burnett equations. There has been limited success to analytically solve the Burnett equations till date. We propose an analytical solution to Burnett equations, which is shown to satisfy the full set of augmented Burnett equations up to Kn of 2.2 with an error of 1 %. Detailed validation shows that the solution represents the integral flow parameters accurately up to Kn ∼ 2.2 and local field properties up to Kn ∼ 0.5. The range over which the proposed Burnett analytical solution is applicable is substantially better than existing analytical solutions, without incorporating any wall scaling functions into constitutive relations and variation of slip coefficients in the boundary conditions. Normalized mass flow rate, friction factor, and axial velocity profile results show very good agreement with the experimental and simulation data. The analytical solution is also able to predict the change in the curvature of streamwise pressure profile. © Springer-Verlag Berlin Heidelberg 2013.
Original languageEnglish
Pages (from-to)403-412
Number of pages10
JournalMicrofluidics and Nanofluidics
Volume16
Issue number1-2
DOIs
Publication statusPublished - 2014

Keywords

  • hypersonic aerodynamics
  • Burnett equations
  • constitutive relations
  • integral flow parameters
  • local field properties
  • microscale gas flow
  • Plane Poiseuille flow
  • scaling functions
  • slip coefficients
  • mathematical techniques

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