2012 2(10)

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   Short abstract

 

Pages:

128 - 133

Language:

RU

Ref.:

10


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2012_2(10)_23.pdf

 

 

EFFECT OF SURFACE ACTIVITY OF REAGENTS ON THE STABILITY OF HEMOKONVEKTIVNUYU INCOMPRESSIBLE FLUID

Aitova E.V., Bratsun D.A.

Perm State Pedagogical University, Perm', Russia


Citation:

Aitova, E.V. and Bratsun, D.A., (2012) Effect of surface activity of reagents on the stability of hemokonvektivnuyu incompressible fluid, Modern Science: Researches, Ideas, Results, Technologies, Iss. #2(10), PP. 128 - 133.


Keywords:

hemokonvektsiya; hydrodynamic stability; reaction diffusion


Abstracts:

In this work we investigate the effect of first-order chemical reaction on the convective stability of a liquid layer having a free surface. We consider the problem of the penetration of the reagent A through the surface in an environment with which it reacts, resulting in the released product S. It is assumed that both participants in the reaction may exhibit surface active properties. The problem of the stability of the ground state, characterized by a reaction-diffusion processes, with respect to monotonic perturbations of concentration - capillary nature, is solved analytically. It is shown how to influence the mechanical equilibrium of liquid the main reagent and reaction product, as well as speed of response. Concentration curves obtained for the neutral Marangoni instability.


References:

  1. Eckert K., Acker M., Shi Y. Chemical pattern formation driven by a neutralization reaction. Part I: Mechanism and basic features. Phys. Fluids, 2004, Vol. 16, pp. 385-399.

  2. Bratsun D.A., De Wit A. On Marangoni convective patterns driven by an exothermic chemical reaction in two-layer systems. Phys. of Fluids, V.16, N.4, 2004, pp. 10821096.

  3. Shi Y., Eckert K. Orientation-dependent Hydrodynamic Instabilities from Chemo-Marangoni Cells to Large Scale Interfacial Deformations. Chinese J. of Chem. Eng., 2007, Vol.15, N.5, pp. 748-753.

  4. Shi Y., Eckert K. Acceleration of reaction fronts by hydrodynamic instabilities in immiscible systems. Chem. Eng. Sci., 2006, Vol. 61, N.17, pp. 5523-5533.

  5. Rongy L., Trevelyan P.M. J., De Wit A. Dynamics of A+B→C reaction fronts in the presence of buoyancy-driven convection, Phys. Rev. Lett., 2008, Vol. 101, N.8, pp. 084503-084507.

  6. Брацун Д.А., Де Вит А. Об управлении хемоконвективными структурами в плоском реакторе. ЖТФ, т.78, Вып.2, 2008, с. 6-13.

  7. Bratsun D.A. and De Wit A. Buoyancydriven pattern formation in reactive immiscible two-layer systems. Chem. Eng. Sci., 2011, Vol. 66, N.22, pp.5723-5734.

  8. Брацун Д.А. Хемоконвективное структурообразование в реагирующих жидкостях. LAM Lambert Academic Publishing, 2012, 145 с. ISBN: 978-3-8465-9124-6.

  9. Riolfo L.A., Carballido-Landeira J., Bounds C.O., Pojman J.A., Kalliadasis S., De Wit A. Experimental reaction-driven liquid film fingering instability, Chem. Phys. Lett., 2012, Vol. 534, pp.13-18.

  10. Pearson J.R.A. On convection cells induced by surface tension.J. Fluid Mech., 1958, Vol. 4, pp. 489-500.

 

 
     

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