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Energies
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Advances in Micro-/Nanoscale Flow and Phase-Change Heat Transfer
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Advances in Micro-/Nanoscale Flow and Phase-Change Heat Transfer

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 (25 May 2026) | Viewed by 1292

Editors

Dr. Yongqing He

E-Mail Website
Guest Editor
Department of Energy and Environment, Southeast University, Nanjing 211189, China
Interests: phase-change heat transfer; microfluidics; micro-/nanoscale transport
Dr. Feng Jiao

E-Mail Website
Guest Editor
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China
Interests: battery thermal management in electric vehicles; micro/nano-structure surfaces; microscale fluid flow and control

Special Issue Information

Dear Colleagues,

Over the past decade, considerable advances have been made in micro- and nanoscale fluid mechanics and phase-change heat transfer, driven by advances in microelectronics, nanotechnology, and advanced fabrication techniques. Developments in microfluidic apparatuses, nanoscale thermal control, and phase-change materials have enabled enhanced heat dissipation in compact structures, improved energy utilization in microreactors, and innovative cooling paradigms for high-power-density electronic devices.

Persistent challenges include clarifying complex interfacial behaviors, multiphase flow instabilities, and heat transfer processes at micro- and nanoscale boundaries, particularly under rigorous conditions such as large heat fluxes or in confined environments. The escalating requirements of applications in electric vehicle battery thermal management, data center cooling, and wearable electronics emphasize the necessity for rigorous analyses of these phenomena.

This Special Issue aims to aggregate cutting-edge investigations into the fundamental mechanisms, numerical simulations, experimental methods, and practical applications of micro- and nanoscale flow and phase-change heat transfer, thus facilitating interdisciplinary collaboration to overcome existing limitations and outline future research avenues.

The purview of contributions includes, but is not limited to, the following areas:

  • Fluid dynamics in microchannels and nanochannels;
  • Boiling, condensation, and evaporation in micro- and nanoscale confinements;
  • Thermal properties of phase-change materials at diminutive scales;
  • Interfacial effects and wettability impacts on heat transfer efficiency;
  • Thermal management in microelectronics and MEMS/NEMS devices;
  • Multiphase flow modeling and simulation at micro- and nanoscale levels;
  • Innovative experimental methodologies for micro- and nanoscale thermal-fluid assessments;
  • Applications in energy harvesting and cooling systems.

Dr. Yongqing He
Dr. Feng Jiao
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-anonymized 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

  • microscale fluid dynamics
  • nanoscale thermal transport
  • phase-change materials
  • interfacial dynamics
  • nanofluids
  • experimental methodologies
  • microfluidic systems

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Published Papers (2 papers)

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Research

21 pages, 4531 KB  
Article
Thermo-Mechanical Analysis of Femtosecond Laser Processing of Two-Layer Metal Materials
by Chi Ma, Xukai Yang, Ling Li, Zhiqiang He and Donghan Yang
Energies 2026, 19(13), 3094; https://doi.org/10.3390/en19133094 - 30 Jun 2026
Viewed by 368
Abstract
In modern precision manufacturing systems, multilayer metal structures are key to achieving high-performance devices. However, during actual processing, they are highly prone to interlayer thermal stress concentration and defects such as interface delamination. To thoroughly elucidate and address this stress evolution issue, this [...] Read more.
In modern precision manufacturing systems, multilayer metal structures are key to achieving high-performance devices. However, during actual processing, they are highly prone to interlayer thermal stress concentration and defects such as interface delamination. To thoroughly elucidate and address this stress evolution issue, this study proposes a two-temperature model based on thermomechanical coupling. A thorough analysis of the thermal–mechanical coupling behavior of copper/aluminum two-layer metal films under femtosecond laser irradiation was conducted, investigating non-equilibrium heat transfer within the two-layer material and the resulting stress evolution. The results indicate that stress waves dynamically modulate the temperature distribution, revealing the critical role of thermo-mechanical coupling in energy transfer. Further studies show that stress waves undergo reflection and transmission at material interfaces, with their phases influenced by the acoustic impedance of the materials. When stress waves propagate from a medium with high acoustic impedance to one with low acoustic impedance, the phase of the transmitted wave remains unchanged, while the phase of the reflected wave reverses. Stress unloading occurs during the phase transition; tensile stress at the interface due to reflection can induce delamination, while horizontal stress tends to initiate cracks. This work contributes to the analysis of stress evolution during laser processing of multilayer metals. Full article
(This article belongs to the Special Issue Advances in Micro-/Nanoscale Flow and Phase-Change Heat Transfer)
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26 pages, 13648 KB  
Article
Sinusoidal Condenser Corrugations for Condition-Dependent Enhancement of Single-Loop Pulsating Heat Pipes
by Wen Luo, Xinle Yang and Yongqing He
Energies 2026, 19(6), 1478; https://doi.org/10.3390/en19061478 - 16 Mar 2026
Viewed by 523
Abstract
Pulsating heat pipes (PHPs) are promising passive heat-transfer devices for compact thermal management; however, their performance is highly sensitive to channel geometry. In particular, the operating-condition-dependent influence of sinusoidal corrugation amplitude on the condenser side remains unclear, despite its importance for oscillation regulation [...] Read more.
Pulsating heat pipes (PHPs) are promising passive heat-transfer devices for compact thermal management; however, their performance is highly sensitive to channel geometry. In particular, the operating-condition-dependent influence of sinusoidal corrugation amplitude on the condenser side remains unclear, despite its importance for oscillation regulation and heat dissipation. This numerical study investigates a single-loop PHP with sinusoidally corrugated condensers (A = 0.25 and 0.5 mm) under heat fluxes of 5000–12,500 W/m2 and filling ratios of 40–60%, using a uniform-diameter PHP as the baseline. The results show that the configuration with A = 0.25 mm exhibits better start-up performance, especially at low heat fluxes, whereas both corrugated configurations provide better thermal performance than the baseline. At a filling ratio of 50%, the thermal-resistance reductions for A = 0.25 and A = 0.5 mm are 14.5% and 9.2% at 5000 W/m2 and 8.4% and 10.5% at 12,500 W/m2, respectively. An operating-condition-dependent amplitude-matching relationship is identified: The smaller amplitude is more favorable for start-up under weak driving conditions, whereas the larger amplitude tends to provide lower thermal resistance and higher equivalent thermal conductivity under strong driving conditions. These findings provide useful guidance for condenser-geometry optimization in single-loop PHPs. Full article
(This article belongs to the Special Issue Advances in Micro-/Nanoscale Flow and Phase-Change Heat Transfer)
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