Instability of viscous incompressible flow in a channel with transversely corrugated walls

• Autorzy: Szumbarski J.

Warianty tytułu

PL

Zjawisko destabilizacji przepływu laminarnego w kanale z poprzecznie pofalowanymi ścianami

• Języki publikacji: EN

Abstrakty

EN

Destabilization of the laminar flow in a channel with transversly wavy walls is investigated. The basic flow is determined by a semi-analytical method based on the concept of immersed boundaries. The stability equations are discretized by the spectrally accurate Chebyshev-tau method. It is demonstrated that the transversal wall waviness can be used in order to achieve destabilization of the laminar flow at low Reynolds numbers. Possible applications include the improvement of mixing and heat/mass transfer in various devices used in heat technology, biotechnology and medicine.

PL

Praca poświęcona jest zjawisku destabilizacji przepływu laminarnego w kanale wywołanej poprzecznym pofalowaniem ścian. Przepływ niezaburzony wyznaczono przy pomocy semi-analitycznej metody zanurzonych granic. Wyprowadzono równania stateczności, które następnie poddano dyskretyzacji przy użyciu wielomianów Czebyszewa. Pokazano, że poprzeczne pofalowanie ścian o odpowiedniej geometrii prowadzi do destabilizacji przepływu przy niskich liczbach Reynoldsa i omówiono własności pola zaburzeń. Wydaje się, że opisany efekt może mieć znaczenie dla intensyfikacji mieszania i poprawy efektywności procesów transportu w technice cieplnej, biotechnologii i medycynie.

Słowa kluczowe

EN

wavy channel; laminar flow; linear stability

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2007
• Tom: Vol. 45 nr 3
• Strony: 659--683
• Opis fizyczny: Bibliogr. 36 poz., rys., tab.

Twórcy

autor

Szumbarski J.

• Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics, Poland,

Bibliografia

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