Extensive studies have explored the dynamics of the ocular surface fluid, though theoretical investigations are typically limited to the use of the lubrication approximation, which is not guaranteed to be uniformly valid a-priori throughout the tear meniscus. However, resolving tear film behaviour within the meniscus and especially its apices is required to characterise the flow dynamics where ...

Consider the 3D flow of a viscous Newtonian fluid upon a curved 2D substrate when the fluid film is thin as occurs in many draining, coating and biological flows. We derive a comprehensive model of the dynamics of the film, the model being expressed in terms of the film thickness η and the average lateral velocity ū. Based upon centre manifold theory, we are assured that the model accurately in...

One of the propulsion mechanisms of microorganisms is based on propagation of bending deformations on an elastic tail. In principle, an elastic thin-film can be placed in a channel and actuated for pumping of the fluid by means of introducing a series of traveling-wave deformations on the film. Here, we present a simulation-based analysis of transient, two-dimensional Stokes flow induced by pro...

Submitted for the DFD15 Meeting of The American Physical Society Thin liquid film in polymer tubing : dynamics and dewetting in partial wetting condition PASCALINE HAYOUN, Soft Matter Sciences and Engineering, ESPCI ParisTech, France, ALBAN LETAILLEUR, Composites and Coatings Department, Saint-Gobain Research, France, JÉRÉMIE TEISSEIRE, Glass Surface and Interface, Saint-Gobain/CNRS, France, EM...

0017-9310/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.ijheatmasstransfer.2009.09.035 * Corresponding author. Tel.: +1 860 654 9325; fax E-mail address: [email protected] (G. Qui An experimental study was conducted to investigate how the addition of small amounts of a surfactant influences the heat transfer characteristics in a thin boiling liquid film flowing in a diverging ope...

An existing open circuit wind tunnel has been modified to incorporate a secondary supply loop to provide controlled flow conditions at the inlet to a film cooling hole model. The primary or crossflow fluid enters from atmosphere through a smooth two dimensional contraction before entering the working section. The newly constructed supply loop has a single inlet from a high pressure source, in-l...

The film flow of a two-dimensional suspension of neutrally buoyant liquid drops down an inclined plane wall is investigated by numerical simulation in the limit of vanishing Reynolds numbers. The results show that well-separated and solitary drops migrate toward an equilibrium position located between the free surface and the wall, for a broad range of the fluid physical properties and flow con...

To overcome the space limit of orifice-type and capillary restrictors in hybrid bearings, a kind of atypical long orifice-type restrictor is proposed and its experimental model is established. Through the analysis of the structure and flow rate of orifice-type restrictor and capillary restrictor, a long orifice-type restrictor and a feasible experimental modeling method are presented by use of ...

The problems of steady film condensation on a vertical surface embedded in a thin porous medium with anisotropic permeability filled with pure saturated vapour are studied analytically by using the Brinkman-Darcy flow model. The principal axes of anisotropic permeability are oriented in a direction that non-coincident with the gravity force. On the basis of the flow permeability tensor due to t...

Soap film flows that have attracted the attention of researchers since the mid-Eighties appear to present a convenient model for laboratory studies of 2D hydrodynamics including turbulence. However, two important issues associated with turbulence in soap films have not been resolved until recently. First, are there conditions under which direct evidence of enstrophy cascade can be presented? Se...