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Coatings
Special Issues
Hydrodynamics of Thin Liquid Films: Retrospective and Perspectives
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Hydrodynamics of Thin Liquid Films: Retrospective and Perspectives

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Liquid–Fluid Coatings, Surfaces and Interfaces".

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 1170

Special Issue Editors

Dr. Chicheng Ma

E-Mail Website
Guest Editor
School of Mechanical Engineering, Hebei University of Technology, Tianjin, China
Interests: thin-film flow stability; data-driven modeling
Dr. Zhenzhen Li

E-Mail Website
Guest Editor
School of Aerospace Engineering, Beijing University of Technology, Beijing, China
Interests: microfluidics; interface fluid dynamics; complex fluid
Prof. Dr. Jianlin Liu

E-Mail Website
Guest Editor
College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, China
Interests: contact line pinning; biomimetic mechanics; petroleum engineering
Prof. Dr. Yongjun Jian

E-Mail Website
Guest Editor
School of Mathematical Sciences, Inner Mongolia University, Huhhot, China.
Interests: micro-and nanoscale flows; microfluidics and nanofluidics; electroosmotic flow

Special Issue Information

Dear Colleagues,

We invite you to submit your work to this Special Issue, titled “Hydrodynamics of Thin Liquid Films: Retrospective and Perspectives”. The hydrodynamics of thin liquid films involves the study of the motion and behaviour of fluids that are confined to thin layers of a few micrometres to a few millimetres thick. This type of flow is commonly seen in industrial processes, and a lot of scientific questions are needed to be interpreted here, including how liquid films spread, wet, and interact with different surfaces, as well as how they are affected by various forces and interactions such as surface tension, viscosity, gravity, and external fields. Understanding the hydrodynamic mechanism of thin liquid films is crucial for a range of industrial and biological applications, including lubrication, coating, microfluidics, and tear film dynamics in the eye. It is a challenging and active area of research to describe the complex interplay of fluid mechanics, thermodynamics, and interfacial physics. Furthermore, the behaviour of thin liquid films becomes more complex while multiple factors are taken into consideration, including the properties of the liquid, the surface topography, and the flow conditions. As such, we encourage the submission of relevant studies which reveal the internal mechanisms of the hydrodynamics of thin liquid films.

This Special Issue will cover a wide range of topics in the hydrodynamics of thin liquid films, including fluid theory, linear instability theory, theoretical modelling, advanced numerical methods, and experimental technology. Topics of interest include, but are not limited to:

  • Recently developments in interfacial phenomenon;
  • Tools and techniques for liquid film flows;
  • Fluid dynamic instabilities, such as Plateau–Rayleigh instability, Kelvin–Helmoltz instability, Rayleigh–Taylor instability, etc.;
  • Contact line instabilities of thin liquid films and viscous fingering;
  • Flows on fibres, planes, inverted substrate or cylindrical surfaces;
  • Non-Newtonian fluid films and computational fluid dynamics;
  • Theoretical and experimental research in hydrodynamics of thin liquid films;
  • Liquid lubrication film.

We look forward to receiving your contributions!

Dr. Chicheng Ma
Dr. Zhenzhen Li
Prof. Dr. Jianlin Liu
Prof. Dr. Yongjun Jian
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • hydrodynamics
  • thin liquid films
  • microfluidics
  • interface fluid dynamics
  • moving contact lines

Published Papers (1 paper)

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Research

12 pages, 6896 KiB  
Article
Research on the Interfacial Instability of Non-Newtonian Fluid Displacement Using Flow Geometry
by MD Mafi, Zhen Qin, Yuting Wu, Sung-Ki Lyu and Chicheng Ma
Coatings 2023, 13(11), 1848; https://doi.org/10.3390/coatings13111848 - 27 Oct 2023
Cited by 1 | Viewed by 844
Abstract
The variation of the classical viscous fingering instability is studied numerically in this work. An investigation of the viscous fingering phenomenon of immiscible displacement in the Hele–Shaw cell (HSC), where the displaced fluid is a shear-thinning fluid, was carried out numerically using the [...] Read more.
The variation of the classical viscous fingering instability is studied numerically in this work. An investigation of the viscous fingering phenomenon of immiscible displacement in the Hele–Shaw cell (HSC), where the displaced fluid is a shear-thinning fluid, was carried out numerically using the volume of fluid (VOF) method by adding a minor depth gradient or altering the geometry of the top plate in the HSC. The findings demonstrate how the presence of depth gradients can change the stability of the interface and offer a chance to regulate and adapt the fingering instability in response to the viscous fingering properties of air driving non-Newtonian fluids under various depth gradients. The relative breadth will shrink under the influence of the depth gradient, and the negative consequences of the gradient will be increasingly noticeable. Specifically, under different power-law indices, we found that with the enhancement of shear-thinning characteristics (lower power-law exponent n) in both positive and negative depth gradients, the fingers that protrude from the viscous fingers become shorter and thicker, resulting in higher displacement efficiency. Additionally, several modifications were performed to the upper plate’s design, and the findings revealed that the shape had no effect on the viscous fingering and only had an impact on the longitudinal amplitude. Based on the aforementioned traits, we may alter the HSC’s form or depth gradient to provide high-quality and effective work. Full article
(This article belongs to the Special Issue Hydrodynamics of Thin Liquid Films: Retrospective and Perspectives)
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