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JOURNALS // Prikladnaya Mekhanika i Tekhnicheskaya Fizika // Archive

Prikl. Mekh. Tekh. Fiz., 2024 Volume 65, Issue 4, Pages 36–40 (Mi pmtf7677)

Analytical solution of boundary layer equations for a nonlinearly viscous dilatant fluid on a flat plate in the case with mass transfer

A. N. Popkov

Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk

Abstract: An analytical (exact) solution of equations of a two-dimensional boundary layer of a non-Newtonian viscous fluid in the case with mass transfer is obtained with the use of the Ostwald–Reiner power-law model in a particular case with $n=2$ (dilatant fluid). It is noted that the apparent viscosity in this case is described by an expression that coincides with the equation for turbulent viscosity of a Newtonian fluid derived by the Prandtl mixing length model. For the particular case under consideration, it is found that there is an analogy between the flows of a non-Newtonian fluid and a Newtonian fluid with turbulent viscosity.

Keywords: non-Newtonian fluid, boundary layer, particular analytical solution.

UDC: 532.135-532.526

Received: 20.06.2023
Revised: 18.01.2024
Accepted: 29.01.2024

DOI: 10.15372/PMTF202315340


 English version:
Journal of Applied Mechanics and Technical Physics, 2024, 65:4, 624–628

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© Steklov Math. Inst. of RAS, 2025