Submit to Special Issue Submit Abstract to Special Issue Review for Energies Propose a Special Issue

Journal Menu

Journal Browser

► Journal Browser

Advances in Heat and Mass Transfer

Special Issue Editors
Special Issue Information
Keywords
Benefits of Publishing in a Special Issue
Published Papers

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

Deadline for manuscript submissions: 10 June 2026 | Viewed by 7816

Share This Special Issue

Special Issue Editors

Prof. Dr. Magdalena Piasecka

E-Mail Website
Guest Editor

Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, Al. Tysiaclecia Panstwa Polskiego 7, 25-314 Kielce, Poland
Interests: heat transfer; flow boiling; minichannels; minigaps; compact heat exchangers; two-phase flow; heat transfer enhancement; temperature measurement; computational methods for heat transfer problems
Special Issues, Collections and Topics in MDPI journals

Dr. Sylwia Hożejowska

E-Mail Website
Guest Editor

Faculty of Management and Computer Modelling, Kielce University of Technology, Al. Tysiaclecia Panstwa Polskiego 7, 25-314 Kielce, Poland
Interests: mathematical modelling of heat transfer and fluid flow resistance phenomena in minichannels; semi-numerical methods for solving ill-posed engineering problems; Trefftz methods

Dr. Beata Maciejewska

E-Mail Website
Guest Editor

Faculty of Management and Computer Modelling, Kielce University of Technology, Al. Tysiaclecia Panstwa Polskiego 7, 25-314 Kielce, Poland
Interests: mathematical modelling of heat transfer in solids and fluids; numerical methods for solving direct and inverse heat transfer problems; computational fluid dynamics (CFD) methods
Special Issues, Collections and Topics in MDPI journals

Dr. Artur Blaszczuk

E-Mail Website
Guest Editor

Department of Advanced Energy Technologies, Czestochowa University of Technology, Dabrowskiego 71, 42-200 Czestochowa, Poland
Interests: heat transfer; heat exchangers; fluidized beds; dynamics of gas-solid flows; fluidization; energy conversion technologies, deterministic models; fuzzy logic; NOx emission
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to announce a Special Issue entitled ‘Advances in Heat and Mass Transfer’, organized in cooperation with the XVII Symposium on Heat and Mass Transfer (SWCiM 2025). The Special Issue will be published in the open access journal Energies, and we warmly welcome submissions from conference participants as well as researchers from the broader scientific community.

The SWCiM 2025 Symposium will be held from 8 to 10 September 2025 in Kielce, Poland. This national scientific event aims to facilitate the exchange of ideas and insights into current and emerging challenges in the fields of thermal engineering and refrigeration, encompassing both fundamental and applied research in heat and mass transfer.

Thematic sessions will cover topics such as the following:

Flow boiling and condensation;
Multiphase flows;
Innovative thermal systems;
Measurement methods in thermal sciences;
Thermal management and control.

Topics of interest for this Special Issue include, but are not limited to, the following:

Modelling and experimental investigation of heat and mass transfer processes;
Modelling and experimental investigation of heat exchangers;
Micro- and nanoscale thermal phenomena;
Analytical, analytical–numerical, and CFD-based modelling of heat and mass transfer processes;
Application issues related to heat and mass exchangers in thermal power engineering;
Studies of thermal-flow processes in thermal energy systems;
Innovative solutions and technological progress in the field of heat and mass exchangers;
Multiphase flows;
Refrigeration and cryogenics;
Renewable energy sources.

We encourage contributions from all researchers from other communities whose work aligns with the themes outlined above.

We look forward to your valuable submissions.

Prof. Dr. Magdalena Piasecka
Dr. Sylwia Hożejowska
Dr. Beata Maciejewska
Dr. Artur Blaszczuk
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 250 words) can be sent to the Editorial Office for assessment.

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

heat and mass transfer
heat exchangers
thermal power engineering
thermal energy systems
multiphase flows

Benefits of Publishing in a Special Issue

Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
Reprint: MDPI Books provides the opportunity to republish successful Special Issues in book format, both online and in print.

Further information on MDPI's Special Issue policies can be found here.

Published Papers (7 papers)

Download All Papers

Order results

Result details

Show export options Show export options

Select all

Export citation of selected articles as:

Research

23 pages, 1148 KB

Open AccessArticle

Conservation-Consistent Modeling of Time-Varying Transfer Delays with Applications in Energy Systems

by Sara Bysko, Krzysztof Łakomiec and Krzysztof Fujarewicz

Energies 2026, 19(5), 1262; https://doi.org/10.3390/en19051262 - 3 Mar 2026

Viewed by 921

Abstract

Time delays are intrinsic to energy systems, arising from transport phenomena, communication latency, and control dynamics; however, their accurate modeling remains challenging, particularly under variable operating conditions. The most common delays are constant over time and are easy to model and simulate. However, simulation tools of time-varying delay systems rely on signal-delay representations that fail to enforce conservation laws, leading to unphysical results in applications involving mass or energy transport. This study develops a physically consistent mathematical framework for time-varying transfer delays that explicitly couples kinematic evolution with conservation principles through a dynamic gain term. A systematic classification is introduced, distinguishing between signal delays (information transfer) and transfer delays (physical transport), further categorized by the source of variability in time delay into Types R (variable extraction), W (variable supply), and M (variable medium). The proposed formulation was implemented in Simulink through newly developed functional blocks supporting all delay variants and validated against representative heat transport scenarios. Comparative analysis demonstrates that standard signal-delay models violate energy conservation by generating spurious energy, whereas the proposed transfer-delay formulation preserves physical consistency under variable-flow conditions. The framework provides a rigorous foundation for accurate modeling of district heating networks, renewable energy integration with power-to-gas systems, thermal storage, and smart grid communications, supporting the development of reliable control strategies essential for the ongoing energy transition. Full article

(This article belongs to the Special Issue Advances in Heat and Mass Transfer)

► Show Figures

Figure 1

32 pages, 11955 KB

Open AccessArticle

Analysis of Influence of Nanoparticle Properties on Nanofluid Thermomagnetic Convection Through Modification of System of Forces

by Aleksandra Roszko, Janusz Donizak and Elzbieta Fornalik-Wajs

Energies 2026, 19(4), 879; https://doi.org/10.3390/en19040879 - 8 Feb 2026

Viewed by 346

Abstract

The tendency to design compact systems results in limited space for particular components and heat transfer processes, which influences the removal of heat. Therefore, new methods for heat transfer intensification are being designed. Coupling passive and active methods of heat transfer intensification seems to be a promising approach toward removing high-heat-rate values from a system. The main purpose of the investigation presented was numerical analysis of the influence of nanoparticle materials on the heat transfer processes occurring during thermal convection in the Rayleigh–Benard system configuration under a strong magnetic field environment. The combination of the usage of nanoparticles and a strong magnetic field as one of the options will be justified for its suitability in heat transfer processes. Two types of nanofluids were analysed, namely water-silver and water-copper oxide, with a 0.25 [vol.%] particle concentration, in both cases. The numerical approach considered the nanofluid as the two-phase fluid and was realised in Comsol Multiphysics. Due to the magnetic field, new forces appeared in the system. These forces depend on the magnetic field orientations, and in one orientation, they caused the transfer of higher heat rates by copper oxide nanofluid by 15 [%], while the second one saw the attenuation of natural convection. Silver nanoparticles, because of their weaker magnetic character, intensified heat transfer by approximately 10 [%]. Therefore, copper oxide seems to be a better option for industrial applications. Full article

(This article belongs to the Special Issue Advances in Heat and Mass Transfer)

► Show Figures

Figure 1

18 pages, 5226 KB

Open AccessArticle

Effect of Condenser Location and Geometry on Thermal Performance of a Vapor Chamber with Multiple Heat Sources

by Geonho Baek, Seo Yeon Kang, Hee Soo Myeong, Mingyu Kang and Seok Pil Jang

Energies 2026, 19(3), 848; https://doi.org/10.3390/en19030848 - 5 Feb 2026

Viewed by 432

Abstract

This paper theoretically and experimentally investigates the effect of condenser location and geometry on the thermal performance of a vapor chamber, as thermal management systems for electronic devices with multiple heat sources under non-uniform heat flux conditions. A weighting factor approach was applied to represent the non-uniform heat input imposed on individual heat sources. The proposed theoretical model was validated through comparison with Lefèvre’s analytical results under the same conditions and experimental data obtained under different condenser locations. It was shown that the wall temperature distribution for the separated condenser configuration was lower than for the concentrated configuration. Using the validated model, the effects of condenser geometry on the temperature uniformity and maximum heat transfer rate of the vapor chamber were analyzed under the capillary limit condition by varying the condenser aspect ratio. The results show that higher aspect ratios improve temperature uniformity due to wider condenser coverage, whereas lower aspect ratios enhance the maximum heat transfer rate by reducing the liquid pressure drop between the evaporator and condenser. Specifically, the maximum heat transfer rate reaches 72.6 W at an aspect ratio of 2.5, which corresponds to a 13.3% increase compared to 64.1 W at an aspect ratio of 8.3. Full article

(This article belongs to the Special Issue Advances in Heat and Mass Transfer)

► Show Figures

Figure 1

34 pages, 10361 KB

Open AccessArticle

Numerical Study of Heat Transfer Intensification in a Chamber with Heat Generating by Irradiated Gold Nanorods: One-Way Multiphysics and Multiscale Approach

by Paweł Ziółkowski, Piotr Radomski, Aimad Koulali, Dominik Kreft, Jacek Barański and Dariusz Mikielewicz

Energies 2026, 19(1), 181; https://doi.org/10.3390/en19010181 - 29 Dec 2025

Viewed by 749

Abstract

This study evaluates energy conversion and heat transfer in a germicidal chamber employing gold nanorods (AuNRs) irradiated with an infrared laser (808 nm, 0.8 W) to generate heat via localized surface plasmon resonance. The investigation focused on the preliminary selection of chamber materials and the geometry of the bottom surface supporting the AuNRs as the heat source in a photothermoablation application. A one-way multiphysics and multiscale approach was applied, integrating nanoscale heating phenomena with a macroscale fluid and heat flow. The validated 2D numerical model shows satisfactory agreement with experimental data and is suitable for further design analyses. Computational Fluid Dynamics (CFD) simulations were conducted to determine temperature and entropy distributions, mean and maximum temperatures, and Nusselt numbers, allowing the assessment of the energy conversion process under different configurations and AuNR dimensions. The results indicate that a configuration with a gradually descending stepped structure enhances interactions between nanoparticles and the fluid, increasing the internal energy and producing elevated temperatures. Under optimal conditions, a temperature rise of approximately 75 °C was achieved. These findings demonstrate that integrating material selection, surface geometry, and nanoparticle absorbance optimization can significantly improve the efficiency of bacterial inactivation in germicidal chambers. This study provides a framework for future investigations on fully three-dimensional multiscale and multiphysical modeling, as well as a targeted AuNR design to maximize the thermal performance. Full article

(This article belongs to the Special Issue Advances in Heat and Mass Transfer)

► Show Figures

Figure 1

29 pages, 3689 KB

Open AccessArticle

Thermodynamic Cycle Model for Ammonia–Ionic Liquid in High Temperature Absorption Heat Pumps—Ionic Liquids Parameters

by Christos Karakostas and Bogusław Białko

Energies 2025, 18(24), 6435; https://doi.org/10.3390/en18246435 - 9 Dec 2025

Viewed by 1027

Abstract

This article evaluates and develops a thermodynamic steady-state model, analyzing the thermodynamic properties of ammonia–ionic liquid (NH₃–IL) working pairs for use in high-temperature (>100 °C) absorption heat pumps. Given the increasing need for energy savings and reductions in greenhouse gas emissions, this is becoming an important consideration in the context of industrial facilities. Prior work on ammonia–ionic liquid (IL) pairs has largely focused on lower supply temperatures and offers no quantitative criteria connecting IL properties to high-temperature (>100 °C) cycle design. This article presents calculations based on correlations in the literature to determine the vapor pressures of pure ionic liquids using a modified Redlich–Kwong equation of state; the vapor–liquid equilibrium (VLE) of NH₃/[emim][SCN] and NH₃/H₂O mixtures in the NRTL model; the specific heats of pure ionic liquids (ILs); the specific heat capacities of NH₃–IL and NH₃–H₂O mixtures; and the excess enthalpy (HE) for NH₃/[emim][SCN] and NH₃/[emim][EtSO₄] as a function of temperature and composition, using a combination of NRTL + Gibbs–Helmholtz and Redlich–Kister polynomials. The calculations confirm the practically zero volatility of ionic liquids in the generator. This preserves the high purity of the ammonia vapor above the NH₃/[emim][SCN] solution (y₁ ≥ 0.997 over a wide range of temperatures and concentrations) and enables the rectification process in the generator to be omitted. The specific heat capacity of pure ionic liquids (ILs) has been shown to be 52–63% lower than that of water. Mixtures of ammonia (NH₃) and ILs with a mass fraction of 0.5/0.5 have a specific heat at 120 °C that is 34–37.5% lower than that of the ammonia–water (NH₃–H₂O) solution. This directly translates into a reduction in the power required in the generator. Excess enthalpy results show moderate or strongly negative values within the useful temperature and concentration range, indicating the exothermic nature of the mixture. At the same time, the NH₃/[emim][EtSO₄] mixture is characterized by a decrease in enthalpy with increasing temperature, suggesting that benefits for the COP of the system can be obtained. Based on these calculations, criteria for selecting ionic liquids for use in high-temperature absorption pumps were formulated: negligible volatility, a low specific heat capacity for the mixture, and a strongly negative excess enthalpy, which decreases with temperature, at the operating temperatures of the absorber and generator. Full article

(This article belongs to the Special Issue Advances in Heat and Mass Transfer)

► Show Figures

Figure 1

22 pages, 6288 KB

Open AccessArticle

Effect of Axial and Lateral Magnetic Field Configurations on Heat Transfer in Mixed Convection Ferrofluid Flow

by Gabriela H. Bęben-Kucharska, Robert Mulka and Bartosz Zajączkowski

Energies 2025, 18(18), 4790; https://doi.org/10.3390/en18184790 - 9 Sep 2025

Viewed by 1081

Abstract

This study investigates the effects of magnetic field orientation and axial extent on convective heat transfer in a laminar flow of water-based ferrofluid through a heated horizontal tube. Experiments were conducted at Reynolds numbers of 109, 150, and 164 using two field configurations: lateral fields, with magnets positioned on opposite sides of the tube with varying polarities, and axial fields, with one to three magnets arranged sequentially underneath the tube to vary the magnetic interaction length. In lateral configurations, the impact on the local Nusselt number was negligible or slightly negative depending on magnet orientation. In contrast, axial configurations demonstrated a clear relationship between the magnetic field interaction length and heat transfer enhancement. The local Nusselt number increased progressively with the number of magnets, reaching a maximum of 28.0% for the triple-magnet configuration at Re = 109. The average improvements in the magnetically influenced region were 6.8%, 10.3%, and 14.7% for the single, double, and triple magnet configurations, respectively. These values resulted from the combined effect of magnetic field geometry and Reynolds number, emphasizing the importance of both interaction length and flow conditions in shaping convective heat transfer in ferronanofluid systems. Full article

(This article belongs to the Special Issue Advances in Heat and Mass Transfer)

► Show Figures

Figure 1

27 pages, 2842 KB

Open AccessArticle

Machine Learning-Based Prediction of Heat Transfer and Hydration-Induced Temperature Rise in Mass Concrete

by Barbara Klemczak, Dawid Bąba and Rafat Siddique

Energies 2025, 18(17), 4673; https://doi.org/10.3390/en18174673 - 3 Sep 2025

Cited by 5 | Viewed by 1890

Abstract

The temperature rise in mass concrete structures, caused by the exothermic process of cement hydration and concurrent heat exchange with the environment, results in thermal gradients between the core and outer layers of the structure. These gradients generate tensile stresses that may exceed the early age tensile strength of concrete, leading to cracking. Therefore, reliable prediction of the temperature rise and associated thermal gradients is essential for assessing the risk of early age thermal cracking. Traditional methods for predicting temperature development rely on numerical simulations and simplified analytical approaches, which are often time-consuming and impractical for rapid engineering assessments. This paper proposes a machine learning-based (ML) approach to predict temperature rise and thermal gradients in mass concrete. The dataset was generated using the analytical CIRIA C766 method, enabling systematic selection and gradation of key factors, which is nearly impossible using measurements collected from full-scale structures and is essential for identifying an effective ML model. Three regression models, linear regression, decision tree, and XGBoost were trained and evaluated on simulated datasets that included concrete mix parameters and environmental conditions. Among these, the XGBoost model achieved the highest accuracy in predicting the maximum temperature rise and the temperature differential between the core and surface of the analysed element. The results confirm the suitability of ML models for reliable thermal response prediction. Furthermore, ML models can provide a usable alternative to conventional methods, offering both tools to thermal control strategies and insight into the influence of input factors on temperature in early age mass concrete. Full article

(This article belongs to the Special Issue Advances in Heat and Mass Transfer)

► Show Figures

Journal Menu

Journal Browser

Advances in Heat and Mass Transfer

Share This Special Issue

Special Issue Editors

Special Issue Information

Keywords

Benefits of Publishing in a Special Issue

Published Papers (7 papers)

Research

Further Information

Guidelines

MDPI Initiatives

Follow MDPI