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Dynamics of a liquid film sheared by a co-flowing turbulent gas

Vellingiri, Rajagopal, Tseluiko, Dmitri, Savva, Nikos and Kalliadasis, Serafim 2013. Dynamics of a liquid film sheared by a co-flowing turbulent gas. International Journal of Multiphase Flow 56 , pp. 93-104. 10.1016/j.ijmultiphaseflow.2013.05.011

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Consider the dynamics of a thin laminar liquid film flowing over an inclined wall in the presence of a co-flowing turbulent gas. The solution to the full two-phase flow problem poses substantial technical difficulties. However, by making appropriate assumptions, the solution process can be simplified and can provide valuable insights. The assumptions allow us to solve the gas and liquid problems independently. Solving for the gas flow reduces to finding perturbations to pressure and tangential stresses at the interface, influencing the liquid problem through the boundary conditions. We analyze the effect of gas flow on the liquid problem by developing an integral-boundary-layer model, which is valid up to moderate liquid Reynolds numbers. We seek solitary-wave solutions of this model under the influence of gas flow via a pseudo-arclength continuation method. Our computations demonstrate that as a general trend, the wave speed increases with increasing the gas shear and the liquid flow rate. Further insight into the problem is provided via time-dependent computations of the integral-boundary-layer model.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Mathematics
Subjects: Q Science > QA Mathematics
Uncontrolled Keywords: Liquid film; Gas shear; Solitary waves; Co-current flow; Numerical continuation
Publisher: Elsevier
ISSN: 0301-9322
Last Modified: 28 Jul 2020 01:37

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