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New Advances in Interfacial Mass Transfer
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New Advances in Interfacial Mass Transfer

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 11334

Special Issue Editors

Priv.-Doz. Dr. Yan Jin

E-Mail Website
Guest Editor
Center of Applied Space Technology and Microgravity (ZARM), Am Fallturm 2, 28359, Bremen, Germany
Interests: fluid mechanics; heat/mass transfer; direct numerical simulation; turbulence modeling; optimization with the SLA; skin friction reduction
Special Issues, Collections and Topics in MDPI journals
Dr. Zhe Lin

E-Mail
Guest Editor
Zhejiang Sci-Tech University, National-Provincial Joint Engineering Laboratory for Fluid Transmission System Technology, Hangzhou, China

Special Issue Information

Dear Colleagues,

Interfacial mass transfer is a popular phenomenon in everyday life as well as an important process in industry. The examples include evaporation of sea water, reaction in a bubble column reactor, or storage of CO2 in deep saline aquifers. Interfacial mass transfer often occurs in an extremely thin boundary layer of species concentration due to the high Schmidt numbers of most species. It is often coupled with multiphase flows, turbulence, and chemical reaction. Their effects on the boundary layer of species concentration are still not fully understood. As a result, it is difficult to predict the interfacial mass transfer rate accurately. Intensive experimental and numerical studies of interfacial mass transfer have been carried out in recent years. We propose this special issue to provide the researchers a platform to publish their novel studies in this field. Through this work, we expect the understanding of interfacial mass transfer can be further enhanced.

The theme of this special issue broadly includes (but is not limited to):

  • New experimental methods for measuring interfacial mass transfer rate;
  • New numerical methods and multiphase models for calculating interfacial mass transfer;
  • Interfacial mass transfer of bubbles;
  • Evaporation or combustion of liquid droplets;
  • Convection induced by interfacial mass transfer;
  • Interfacial mass transfer in canopy flows and atmospheric flows;
  • Novel methods for enhancing interfacial mass transfer;
  • Theoretical analysis of interfacial mass transfer;
  • Correlations for the Sherwood number.

Priv.-Doz. Yan Jin
Dr. Zhe Lin
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.

Published Papers (5 papers)

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Research

24 pages, 6712 KiB  
Article
Spectral Relaxation Methodology for Chemical and Bioconvection Processes for Cross Nanofluid Flowing around an Oblique Cylinder with a Slanted Magnetic Field Effect
by Ghulam Rasool, Syed Zahir Hussain Shah, Tanveer Sajid, Wasim Jamshed, Gilder Cieza Altamirano, Bright Keswani, Rafaél Artidoro Sandoval Núñez and Manuel Sánchez-Chero
Coatings 2022, 12(10), 1560; https://doi.org/10.3390/coatings12101560 - 16 Oct 2022
Cited by 19 | Viewed by 1793
Abstract
The current investigation explains the chemical reaction and bioconvection process for an inclined magnetized Cross nanofluid over an inclined cylinder using a spectral relaxation approach. Additionally, the facts concerning swimming gyrotactic microorganisms, non-uniform thermal conductivity, and variable decrease or increase in heat sources [...] Read more.
The current investigation explains the chemical reaction and bioconvection process for an inclined magnetized Cross nanofluid over an inclined cylinder using a spectral relaxation approach. Additionally, the facts concerning swimming gyrotactic microorganisms, non-uniform thermal conductivity, and variable decrease or increase in heat sources are taken together. Each profile is checked for inclined and orthogonal magnetic impact. Appropriate transformations made for conversion of nonlinear PDEs into systems of ODEs. For obtaining numerical results, a spectral relaxation approach is utilized, and graphs are plotted with each physical parameter attached. It is well established that the temperature field intensifies owing to an amplification of thermal conduction and Brownian diffusivity phenomena. The heat transfer rate amplifies owing to a magnification in magnetic parameter and thermal conductivity, but the velocity field diminishes as a result of magnification in the Weissenberg number and power law index. Amplification in the reaction rate constant parameter diminishes the concentration field. Activation energy is the key factor responsible for magnification in the concentration field. Furthermore, smooth agreement is found during comparison with the existing literature. Statistical analysis is also conducted for physical quantities. Full article
(This article belongs to the Special Issue New Advances in Interfacial Mass Transfer)
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18 pages, 7556 KiB  
Article
Thermal Case Study of Cilia Actuated Transport of Radiated Blood-Based Ternary Nanofluid under the Action of Tilted Magnetic Field
by Najma Saleem, Tahreem Ashraf, Ibtisam Daqqa, Sufian Munawar, Nazeran Idrees, Farkhanda Afzal and Deeba Afzal
Coatings 2022, 12(6), 873; https://doi.org/10.3390/coatings12060873 - 20 Jun 2022
Cited by 12 | Viewed by 1909
Abstract
Micro/nanoscale fabricated devices have widely been used in modern technology and bioengineering as they offer excellent heat transfer. Removal of excess heat, coolant selection, rapid mixing, and handling proportion of colloidal metallic nanogranules in the base fluid are the main challenges in micro/nanofluidic [...] Read more.
Micro/nanoscale fabricated devices have widely been used in modern technology and bioengineering as they offer excellent heat transfer. Removal of excess heat, coolant selection, rapid mixing, and handling proportion of colloidal metallic nanogranules in the base fluid are the main challenges in micro/nanofluidic systems. To address these problems, the primary motivation of the intended mathematical flow problem is to investigate the thermal and flow aspects of blood-based ternary nanofluid in the presence of inclined magnetic field and thermal radiations through a microfluidic pump with elastic walls. Further, the pump inner surface is smeared with fabricated cilia. The embedded cilia blow in coordination to start metachronal travelling waves along the pump wall that assist homogenous mixing and manipulation. The entire analysis is conducted in moving frame and simplified under lubrication and Rosseland approximations. Numerical solution of various flow and thermal entities are computed via the shooting method and plotted for different values of the parameters of interest. A comparative glimpse allows us to conclude that the trimetallic blood-based nanofluid exhibits elevated heat transfer rate by 12–18%, bi-metallic by about 11–12%, and mono nanofluid by about 6% compared to the conventional blood model. The study also determines that the prolonged cilia commence augmentation in flowrate and pressure-gradient around the pump deep portion. Furthermore, the radiated ternary liquid under fragile magnetic field effects may contribute to the cooling process by eliminating unnecessary heat from the system. It is also noticed that around the ciliated wall, the heat transfer irreversibility effects are appreciable over the fluid frictional irreversibility. Full article
(This article belongs to the Special Issue New Advances in Interfacial Mass Transfer)
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16 pages, 8126 KiB  
Article
Turbulence Intensity Characteristics of a Magnetoliquid Seal Interface in a Liquid Environment
by Wangxu Li, Zhenggui Li, Ziyue Wang, Feng Wu, Lianchen Xu and Shengyang Peng
Coatings 2021, 11(11), 1333; https://doi.org/10.3390/coatings11111333 - 30 Oct 2021
Cited by 11 | Viewed by 1350
Abstract
In a liquid environment, the turbulence intensity of the interfacial layer between the magnetic and sealing medium fluids in magnetic liquid seals directly affects the layer stability. Reducing the maximum turbulence intensity of the fluid interface layer effectively improves the stability of the [...] Read more.
In a liquid environment, the turbulence intensity of the interfacial layer between the magnetic and sealing medium fluids in magnetic liquid seals directly affects the layer stability. Reducing the maximum turbulence intensity of the fluid interface layer effectively improves the stability of the magnetic fluid rotary seal. In this study, we simulated magnetic fluid sealing devices with different structures in liquid environments using the FLUENT software. The simulation results were verified through experimental analyses of the turbulence intensity at the sealing interface. The maximum turbulence intensity of the liquid interface layer increased with increasing shaft speed. At the same speed, the turbulence intensity was maximized at the shaft interface before gradually decreasing in a multistage linear pattern along the radial direction. A magnetic liquid seal with an optimized structure (OS) in the liquid environment was designed based on these results. The maximum turbulence intensity of the liquid interface layer in the OS was independent of the rotation speed and was more than 20% lower than that that in the traditional structure. These results provide a reference for designing magnetic liquid sealing devices. Full article
(This article belongs to the Special Issue New Advances in Interfacial Mass Transfer)
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23 pages, 924 KiB  
Article
The Local Distribution of Temperatures and Entropy Generation Rate in an Ideal Counterflow Heat Exchanger
by Zhimin Dong and Qinglin Du
Coatings 2021, 11(8), 970; https://doi.org/10.3390/coatings11080970 - 15 Aug 2021
Cited by 3 | Viewed by 2056
Abstract
The process of heat exchange between two fluids of different temperatures and separated by a solid wall occurs in many engineering applications. Log mean temperature difference and effectiveness-NTU methods are widely used to assist in the design of heat exchangers. However, the [...] Read more.
The process of heat exchange between two fluids of different temperatures and separated by a solid wall occurs in many engineering applications. Log mean temperature difference and effectiveness-NTU methods are widely used to assist in the design of heat exchangers. However, the two methods focus on overall analysis and cannot show the local temperature distributions. This paper obtains the mathematical solutions to the temperature profiles in an ideal counterflow heat exchanger. The aim of this research is to explain the phenomenon called the “entropy generation paradox”, which indicates a discrepancy between effectiveness and optimal entropy generation. The theoretical analysis reveals that the temperature curves are exponential functions when the heat capacity rates of the two streams are different; otherwise, the curves are linear functions. A heat exchanger is demonstrated to draw the temperature profiles under different working conditions. Local entropy generation rates are determined by the ratio of local stream temperatures in the form of a hook function. To realize a certain heat duty, there are many stream flow rate couples, and each couple results in a different entropy generation profile and obtains a corresponding total entropy generation. The helical steam generator of a high-temperature gas-cooled reactor is analyzed in this article and the principle of equipartition of entropy generation is confirmed. This principle indicates that, among the many working conditions to achieve a certain heat duty, a heat exchanger characterized by a nearly constant entropy production gives the best second law efficiency possible in order to achieve the best energy conversion. Full article
(This article belongs to the Special Issue New Advances in Interfacial Mass Transfer)
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15 pages, 4720 KiB  
Article
Effects of Joule Heating and Viscous Dissipation on Magnetohydrodynamic Boundary Layer Flow of Jeffrey Nanofluid over a Vertically Stretching Cylinder
by Haroon Ur Rasheed, Abdou AL-Zubaidi, Saeed Islam, Salman Saleem, Zeeshan Khan and Waris Khan
Coatings 2021, 11(3), 353; https://doi.org/10.3390/coatings11030353 - 19 Mar 2021
Cited by 57 | Viewed by 3108
Abstract
This article investigates unsteady magnetohydrodynamic (MHD) mixed convective and thermally radiative Jeffrey nanofluid flow in view of a vertical stretchable cylinder with radiation absorption and heat; the reservoir was addressed. The mathematical formulation of Jeffrey nanofluid is established based on the theory of [...] Read more.
This article investigates unsteady magnetohydrodynamic (MHD) mixed convective and thermally radiative Jeffrey nanofluid flow in view of a vertical stretchable cylinder with radiation absorption and heat; the reservoir was addressed. The mathematical formulation of Jeffrey nanofluid is established based on the theory of boundary layer approximations pioneered by Prandtl. The governing model expressions in partial differential equations (PDEs) form was transformed into dimensionless form via similarity transformation technique. The set of nonlinear nondimensional partial differential equations are solved with the help of the homotopic analysis method. For the purpose of accuracy, the optimizing system parameters, convergence, and stability analysis of the analytical algorithm (CSA) were performed graphically. The velocity, temperature, and concentration flow are studied and shown graphically with the effect of system parameters such as Grashof number, Hartman number, Prandtl number, thermal radiation, Schmidt number, Eckert number, Deborah number, Brownian parameter, heat source parameter, thermophoresis parameter, and stretching parameter. Moreover, the consequence of system parameters on skin friction coefficient, Nusselt number, and Sherwood number is also examined graphically and discussed. Full article
(This article belongs to the Special Issue New Advances in Interfacial Mass Transfer)
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