Influence of longitudinal vibrations of the pulsation fields of long-wave Marangoni convection in thin film

2020 ◽  
Author(s):  
I. V. Volodin ◽  
A. A. Alabuzhev
Keyword(s):  
Thin Film ◽  
Marangoni Convection ◽  
Longitudinal Vibrations ◽  
Long Wave

scholarly journals Long-wave Marangoni convection in a thin film heated from below

2012 ◽  
Vol 85 (1) ◽  
Author(s):  
S. Shklyaev ◽  
A. A. Alabuzhev ◽  
M. Khenner
Keyword(s):  
Thin Film ◽  
Marangoni Convection ◽  
Long Wave

scholarly journals Oscillatory and monotonic modes of long-wave Marangoni convection in a thin film

2010 ◽  
Vol 82 (2) ◽  
Author(s):  
S. Shklyaev ◽  
M. Khenner ◽  
A. A. Alabuzhev
Keyword(s):  
Thin Film ◽  
Marangoni Convection ◽  
Long Wave

Influences of Marangoni Convection and Variable Magnetic Field Hybrid Nanofluid Thin Film Flow past a Stretching Surface

2021 ◽  
Author(s):  
Noor Wali Khan ◽  
Arshad Khan ◽  
Muhammad Usman ◽  
Taza Gul ◽  
Abir Mouldi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
Film Flow ◽  
Marangoni Convection ◽  
Flow System ◽  
Thermal Characteristics ◽  
Variable Magnetic Field ◽  
Current Work ◽  
Hybrid Nanofluid ◽  
Thin Film Flow

Abstract The investigations about thin-film flow play a vital role in the field of optoelectronics and magnetic devices. Thin films are reasonably hard and thermally stable but are more fragile. The thermal stability of thin film can be further improved by incorporating the effects of nanoparticles. In the current work, a stretchable surface is considered upon which hybrid nanofluid thin-film flow is taken into account. The idea of augmenting heat transmission is focused in current work by making use of hybrid nanofluid. The flow is affected by variations in the viscous forces along with viscous dissipation effects and Marangoni convection. A time-constrained magnetic field is applied in the normal direction to the flow system. The equations governing the flow system are shifted to a non-dimensional form by applying similarity variables. The homotopy analysis method (HAM) has been employed to find the solution of resultant equations. It has been noticed in this study that, the flow characteristics decline with augmentation in magnetic, viscosity, and unsteadiness parameters while grow up with enhancing values of thin-film parameter. Thermal characteristics are supported by the growing values of the Eckert number and unsteadiness parameter while opposed by the viscosity parameter and Prandtl number. The numerical impact of different emerging parameters upon skin friction and Nusselt number has been calculated in tabular form. A comparison of current work with established result has carried out with a good agreement in both results.

scholarly journals The oscillatory longwave Marangoni convection in a thin film heated from below

2021 ◽  
Vol 3 (10) ◽  
Author(s):  
Anna Samoilova ◽  
Alexander Nepomnyashchy
Keyword(s):  
Thin Film ◽  
Free Surface ◽  
Large Scale ◽  
Marangoni Convection ◽  
Thin Liquid Film ◽  
Stationary Regime ◽  
Oscillatory Regime ◽  
Oscillatory Flows ◽  
The Past ◽  
Heating From Below

Abstract A novel type of Marangoni convection was predicted theoretically a decade ago. The thin liquid film atop a substrate of low thermal conductivity was considered. In the case of heating from below, the Marangoni convection emerges not only in a conventional stationary regime, but also as oscillatory flows. Specifically, the oscillatory Marangoni convection emerges if (1) the heat flux from the free surface is small, and (2) the large-scale deformation of the free surface is allowed. During the past decade, this novel Marangoni convection was detected and investigated in several other theoretical works. The review discusses the recent achievements in studying the oscillatory Marangoni convection in a thin film heated from below. The guiding data for observation of the oscillatory regime are also provided.

Infrared Reflective Coatings for Window Glazing

2008 ◽  
Vol 144 ◽  
pp. 226-231 ◽  
Author(s):  
Jitka Mohelníková
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Infrared Radiation ◽  
Spectral Characteristics ◽  
Heat Losses ◽  
Glass Pane ◽  
Thin Film Coatings ◽  
Long Wave ◽  
Reflective Coatings ◽  
Long Wave Infrared

Glasses reflective in the spectral range of long-wave infrared radiation operate as heat mirrors. These glasses have found wide applications in architecture. Special thin film coatings on glass panes reflect long wave infrared radiation back to building interiors. The reflective thin films limit absorption of infrared radiation within the glass pane and reduce radiation heat losses of glazings. Heat losses of windows could be significantly limited with the coated glasses which are called low-emissivity glazings. The study of materials convenient for infrared reflective coatings, the optimal composition of thin films and their thicknesses is the main topic of the presented paper. The study is based on measurements of spectral characteristics of selected glasses and computer simulations of the thin film composition for applications of window infrared reflective coatings.

scholarly journals Effect of Marangoni Convection in a Droplet Containing Surfactant on Thin Film Shape

2021 ◽  
Vol 333 ◽  
pp. 03002
Author(s):  
Kazuki Matsuda ◽  
Tenshin Oyama ◽  
Hirotaka Ishizuka ◽  
Shuji Hironaka ◽  
Jun Fukai
Keyword(s):  
Thin Film ◽  
Surface Tension ◽  
Marangoni Convection ◽  
Printed Electronics ◽  
Film Formation ◽  
Droplet Diameter ◽  
Evaporation Process ◽  
Polystyrene Solution ◽  
Fluorescent Polymer ◽  
The Relationship

In printed electronics, uniform and solute film formation by the inkjet method is very important. This study aims to clarify the relationship between Marangoni convection generated by adding surfactant and thinning of solute film. First, four types of surfactants were added one by one to the anisole-polystyrene solution with varying concentrations, and then a little amount of fluorescent polymer was added as tracer to each solution. Next, each solution was dropped on a hydrophilic substrate with a droplet diameter of 80 micrometers using an inkjet method, and the flow in the evaporation process and the shape of the solute film after drying were observed. As a result, Marangoni convection occurred when any surfactant was added at a certain concentration or more, and the solute film after drying of the droplets to which two kinds of surfactants were added became thin and approached a uniform shape. In addition, the measurement of surface tension showed that the visualized flow is the Marangoni convection.

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