Rayleigh-Taylor instability in a finite thickness layer of a non-Newtonian fluid

• Autorzy: Rudraiah N. , Sridharan P. , Bhargava S.
• Języki publikacji: EN

Abstrakty

EN

A mechanism of surface instability in non-Newtonian fluid is described using Rayleigh-Taylor instability as an example. The combined effects of non-Newtonian parameter n, normal stress 'delta', film thickness h, and surface tension 'gamma' on surface instability is studied using linear stability analysis. It is shown that stable, neutrally stable and unstable states are possible depending on the values of n, in contrast to the existence of only unstable state in Newtonian fluids. Further, the graph of dispersion curve reveals that both n and 'lambda'(='gamma'/'delta') control dispersion curve with the layer thickness just affecting the nature of growth rate of instability.

Słowa kluczowe

EN

Rayleigh-Taylor instability; finite thickness layer; non-Newtonian fluid

PL

hydromechanika

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: Applied Mechanics and Engineering
• Rocznik: 2000
• Tom: Vol. 5, no 2
• Strony: 315--327
• Opis fizyczny: Bibliogr. 9 poz., wykr.

Twórcy

autor

Rudraiah N.

autor

Sridharan P.

autor

Bhargava S.

• UGC-DSA Centre of Fluid Mechanics, Department of Mathematics, Bangalore University, Bangalore - 560 001, INDIA