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Fundamentals and Applications of Multiphase Flow and Heat Transfer

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A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "J1: Heat and Mass Transfer".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 7696

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Special Issue Editors

Prof. Dr. Bofeng Bai

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Guest Editor

State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
Interests: multiphase flow and heat transfer; complex drop flow dynamics; gas liquid mixing in propulsion and power systems

Dr. Ke Wang

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Guest Editor

College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China
Interests: fluid flow and transport in petroleum reservoirs; enhancement of heat transfer; boiling; computational modeling

Special Issue Information

Dear Collagues,

Multiphase flow and heat transfer have wide applications in the fields of new and renewable energy, cleaning coal technology, nuclear energy, as well as mechanical engineering, petrochemical engineering, environmental engineering, etc. In order to achieve safety, high efficiency, and emission reduction in industrial processes, we must extend our research beyond its previous limits, broaching the fundamentals of multiphase flow and heat transfer in an interdisciplinary manner and focusing on extreme working conditions, complex fluids, cross-scale coupling, etc. This Special Issue entitled “Fundamentals and Applications of Multiphase Flow and Heat Transfer” aspires to highlight the frontiers and recent progress in a broad range of theoretical studies and applications, covering a broad range of topics of interest, including but not limited to the following:

Cavitation, biomedical, acoustics, nucleation;
Collision, agglomeration, and breakup;
Colloidal and suspension dynamics;
Condensation, boiling, evaporation;
Contact line structure and dynamics;
Industrial applications;
Interfacial phenomena;
Jet, spray, atomization;
Micro- and nanoscale multiphase flows;
Modelling and computational methods;
Particle, bubble, and droplet dynamics;
Reactive multiphase flows;
Turbulence in multiphase flows.

Prof. Dr. Bofeng Bai
Dr. Ke Wang
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. Energies is an international peer-reviewed open access semimonthly 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

Multiphase flow
Heat transfer
Interface dynamics
Phase change
Modelling
Particle dynamics
Bubble dynamics
Droplet flow
Multi-component flows
Complex fluids

Published Papers (5 papers)

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Research

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23 pages, 60874 KiB

Open AccessFeature PaperArticle

A Particle-Scale Model of Surface Tension for Two-Phase Flow: Model Description and Validation

by Xiaoxi Zhang, Can Cao, Nan Gui, Xiaoli Huang, Xingtuan Yang, Jiyuan Tu, Shengyao Jiang and Qian Zhao

Energies 2022, 15(19), 7132; https://0-doi-org.brum.beds.ac.uk/10.3390/en15197132 - 28 Sep 2022

Viewed by 1080

Abstract

A particle-scale surface tension force model (STF) is proposed here to be incorporated in the smoothed hydrodynamics particle (SPH) method. This model is based on the identification of interface geometry and the gradient of densities across the interface. A square bubble of single-phase and a square bubble immersed in fluids are simulated by the STF model accompanied with a combined kernel in SPH to validate their suitability to simulate the immersed bubble motion. Two cases of rising bubbles, i.e., a single rising bubble and a pair of rising bubbles, are simulated for demonstration. The rising velocity, density, surface tension force, interfacial curvature, the power of the STF, and the smoothing length of the rising bubble and surrounding fluids are all computed by the current STF model to study the characteristics of immersed bubble’s motion and coalescence. The current model provides a way to capture the interfacial interactions in two-phase flows at particle scales. Full article

(This article belongs to the Special Issue Fundamentals and Applications of Multiphase Flow and Heat Transfer)

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18 pages, 13983 KiB

Open AccessArticle

Analysis of Leaked Crude Oil in a Mountainous Area

by Ke Wang, Jing Peng, Jue Zhao and Bing Hu

Energies 2022, 15(18), 6568; https://0-doi-org.brum.beds.ac.uk/10.3390/en15186568 - 08 Sep 2022

Cited by 3 | Viewed by 1021

Abstract

China–Myanmar oil and gas pipelines in Southwest China guarantee the energy security of China. Due to poor geographical circumstances, the safety of pipelines is seriously threatened by natural disasters. Therefore, there is a crucial, practical significance to establishing a model of leakage and diffusion of crude oil in the mountainous terrain and to conduct related applied studies. In the present study, computational fluid dynamic simulations of the dynamic diffusion process of leaking contaminants on the mountain surface was performed; the influence of the pipe pressure, landform, surface environment and leakage location on diffusion speed and range were discussed carefully. The results indicate that the variation of topographic altitude determines the path of leaking contaminants. Accordingly, an improved algorithm based on the SFD8 algorithm to predict the path of leaking contaminants at a low leakage rate was proposed; this would be instructive for an emergency response to ensure the safety of pipelines. Full article

(This article belongs to the Special Issue Fundamentals and Applications of Multiphase Flow and Heat Transfer)

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17 pages, 3153 KiB

Open AccessArticle

A Study of the Interface Fluctuation and Energy Saving of Oil–Water Annular Flow

by Fan Jiang, Jiaqing Chang, Haitao Huang and Junhong Huang

Energies 2022, 15(6), 2123; https://0-doi-org.brum.beds.ac.uk/10.3390/en15062123 - 14 Mar 2022

Cited by 2 | Viewed by 1656

Abstract

Oil–water annular flow is an efficient method of heavy oil transportation for energy-saving. To deeply study the influencing factors of the energy savings of oil–water annular flow, this paper compares the interface fluctuation and energy-saving situation of oil–water annular flow under different pipe structures (such as straight pipe, sudden-contraction pipe, and elbow pipe), flow parameters, and fluid properties. In the straight pipe, the flow parameters can impact the oil–water annular flow pattern and the energy savings, and the interface fluctuation is consistent with the energy savings. The stable oil–water core annular flow has slight interface fluctuation and significant energy savings. At the same time, the influences of pipe structure and fluid properties on energy saving are also analyzed. In the sudden-contraction pipe, the oil–water interface fluctuates, largely due to the sharp changes in flow cross-section, which leads to reduced energy savings. In the elbow, the oil–water interface fluctuates greatly due to the influence of centrifugal force caused by flow direction variation, and also leads to a decline in energy savings. The effects of oil property or annulus liquid property on the interface fluctuates, and the energy savings are analyzed; reducing surface tension is an effective measure to provide an energy-saving effect. These results can provide a reference for the design of heavy-oil-transportation pipelines, the analysis of interface fluctuation, and the energy-saving evaluation of oil–water annular flow. Full article

(This article belongs to the Special Issue Fundamentals and Applications of Multiphase Flow and Heat Transfer)

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13 pages, 3203 KiB

Open AccessArticle

Moisture Transfer Characteristics and Kinetics Determination for Insulated Paperboard in Hot-Pressing Process

by Lingbo Kong, Jingyi Zhao, Jiahao Li and Yuejin Yuan

Energies 2022, 15(6), 2069; https://0-doi-org.brum.beds.ac.uk/10.3390/en15062069 - 11 Mar 2022

Viewed by 1316

Abstract

The transport characteristics and kinetics of moisture in hot-pressing are crucial to controlling the insulated paperboard drying process. The effects of operating temperature (110, 120, and 130 °C) on moisture transfer characteristics of an insulated paperboard were investigated. The results showed that the hot-pressing process consists of four successive stages, i.e., the warm-up stage, the boiling-point temperature stabilization stage, the temperature slowly rising stage, and the constant temperature stage. It was observed that a higher temperature mainly affected the medium and later stages of the hot-pressing process. When the operating temperature increased from 110 to 130 °C, the maximum value of the drying rate increased by 16.04%, and the drying time decreased by 62.50% consequently. Furthermore, a new mathematical model used to describe the moisture transfer kinetics for the insulated paperboard hot-pressing was developed in this paper. The results from the proposed new model were evaluated with another eight commonly used models. It showed better predictions and satisfactorily described the moisture transfer kinetics of the insulated paperboard compared with other models under the investigated hot-pressing conditions. The values of R², χ², and root mean square error (RMSE) of the new model varied from 0.99961 to 0.99999, 0.00001 to 0.00005, and 0.00120 to 0.00599, respectively. Full article

(This article belongs to the Special Issue Fundamentals and Applications of Multiphase Flow and Heat Transfer)

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Review

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20 pages, 5541 KiB

Open AccessReview

Review of Core Annular Flow

by Baoshan Xie, Fan Jiang, Huajian Lin, Mingcong Zhang, Zhenzhen Gui and Jianhua Xiang

Energies 2023, 16(3), 1496; https://0-doi-org.brum.beds.ac.uk/10.3390/en16031496 - 02 Feb 2023

Cited by 1 | Viewed by 1762

Abstract

With the increasing demand for heavy oil, core annular flow (CAF) is an economical method to transport heavy oil, and many researchers have explored the energy-saving aspects of the CAF method. This paper presents a review of CAF energy saving and factors affecting CAF energy saving. Among them, the energy saving of CAF mainly concerns the changes in pressure drop and drag reduction efficiency; the factors affecting the energy saving of CAF mainly concern the problem of stability, the issue of restarting the pipeline system, the impact of a nozzle, the impact of fouling on the flow in the pipe, and the problem of oil–water accumulation. The aim of this paper is to provide a reference for the practical application of CAF in heavy oil transportation. Full article

(This article belongs to the Special Issue Fundamentals and Applications of Multiphase Flow and Heat Transfer)

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