Gibbs marangoni effekt emulsion sheets

The Gibbs effect states that the surface tension of a solution will decrease as the concentration of the surfactant in solution increases until the critical micelle concentration (cmc) is achieved. The Marangoni effect states that there is a finite, diffusion rate based, time during which the surface-active molecules in the bulk solution ...

Der Marangoni-Effekt trägt hingegen zu einer Stabilisierung von Schäumen unter dynamischen Bedingungen bei. Neben den oben beschriebenen Polyederschäumen, die sich nur bei Anwesenheit von Tensiden bilden, gibt es auch Kugelschäume. Sie bestehen aus selbstständigen Blasen, die sich gegebenenfalls bei Berührung untereinander vereinigen.

Bursting of Dilute Emulsion-Based Liquid Sheets Driven by a Marangoni Effect. Abstract: We study the destabilization mechanism of thin liquid sheets expanding in air and show that dilute oil-in-water emulsion-based sheets disintegrate through the nucleation and growth of holes that perforate the sheet. Abstract: We study the destabilization mechanism of thin liquid sheets expanding in air and show that dilute oil-in-water emulsion-based sheets disintegrate through the nucleation and growth of holes that perforate the sheet. The velocity and thickness fields of the sheet outside the holes are not perturbed by holes and hole opening follows a Taylor-Culick law. Marangoni convection in droplets on superhydrophobic surfaces By DANIEL TAM1, VOLKMAR von ARNIM2 †, G. H. McKINLEY2 AND A. E. HOSOI2 1Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA 2Hatsopoulos Microfluids Laboratory, Department of Mechanical Engineering ... A method of forming an optical device comprises applying a laser beam to a target area of the surface so as to selectively heat material of the surface thereby to provide transfer of material due to a surface tension gradient, wherein the surface is such that, when liquid, parts of the surface at higher temperatures have a higher surface tension than adjacent parts of the surface at lower ... Like the Gibbs dividing surface model, the diffuse interface model has been applied to a wide range of phenomena, such as mixing and demixing in binary mixtures, buoyancy driven detachment of wall-bound droplets, droplet breakup and coalescence, Marangoni effects, and flow in nano- and microchannels.Here we discuss the derivation of the ...

along the drop interface and exemplified by the Gibbs–Marangoni effect (Bergenståhl & Claesson,1997). Studying the emulsification process in a high pressure homog-enizer is experimentally challenged by the large velocity gradient and high static pressures in comparison to the very small geometrical scales involved. Whereas small-molecule emulsifiers adsorb to the oil–water interface to efficiently stabilize the system to oil droplet coalescence throughout the Gibbs–Marangoni effects, 1,11 macromolecules like proteins form elastic layers on the oil droplet surfaces during emulsification processes to provide the effective steric and electrostatic ... Bursting of Dilute Emulsion-Based Liquid Sheets Driven by a Marangoni Effect. Abstract: We study the destabilization mechanism of thin liquid sheets expanding in air and show that dilute oil-in-water emulsion-based sheets disintegrate through the nucleation and growth of holes that perforate the sheet. Marangoni effect. The Marangoni effect (also called the Gibbs–Marangoni effect) is the mass transfer along an interface between two fluids due to a gradient of the surface tension. New!!: Foam and Marangoni effect · See more » Mass transfer Like the Gibbs dividing surface model, the diffuse interface model has been applied to a wide range of phenomena, such as mixing and demixing in binary mixtures, buoyancy driven detachment of wall-bound droplets, droplet breakup and coalescence, Marangoni effects, and flow in nano- and microchannels.Here we discuss the derivation of the ...