Absolute and convective instabilities in the incompressible boundary layer on a rotating disk with temperature-dependent viscosity
The absolute and convective instability of Von-Kármán rotating disk flow with a temperature dependence viscosity of the form μ′ = μ ∞/[1 + ϵ( T − T ∞)/( T ω − T ∞)] is investigated. With the use of a spectral method, the linear stability equations are formulated and then solved numerically. Solution...
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Veröffentlicht in: | International journal of heat and mass transfer 2005-02, Vol.48 (5), p.1022-1037 |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
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Zusammenfassung: | The absolute and convective instability of Von-Kármán rotating disk flow with a temperature dependence viscosity of the form
μ′
=
μ
∞/[1
+
ϵ(
T
−
T
∞)/(
T
ω
−
T
∞)] is investigated. With the use of a spectral method, the linear stability equations are formulated and then solved numerically. Solutions have been obtained for various values of the parameter
ϵ which controls the temperature dependence of viscosity. It is established the stability of the flow is particularly sensitive to changes in viscosity and even for small positive values of
ϵ the flow is much more unstable compared to the constant viscosity case. |
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ISSN: | 0017-9310 1879-2189 |
DOI: | 10.1016/j.ijheatmasstransfer.2004.07.036 |