Micro Thermal Devices and Their Applications, 2nd Edition

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A:Physics".

Deadline for manuscript submissions: 31 July 2025 | Viewed by 301

Special Issue Editor


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Guest Editor
Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy
Interests: microfluidics; fluid flow; heat transfer; micro thermal devices; microfabrication techniques
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Special Issue Information

Dear Colleagues,

Microsystems are widely used in the microelectronics, biomedical, pharmaceutical, chemical, automotive, and aerospace fields, among others. Among the microcomponents that are commonly used in these fields, devices with improved heat exchange capacities due to their very large surface-to-volume ratio are represented by microchannel heat transfer devices.

Although the performances of microchannel heat transfer devices have been investigated by many authors, more research is required to better understand the thermal phenomena acting at the microscale and to evaluate new scenarios.

In particular, more accurate methodologies are needed to generate sufficient knowledge of the fluid flow and the heat transfer mechanism in microdevices, thus providing accurate correlations between the performances of these apparatuses and the relevant parameters that affect their performance.

On the other hand, the advent of new microfabrication technologies and additive manufacturing has enabled innovative geometries. In particular, new fabrication technologies can be used to obtain simple, novel geometries, while additive manufacturing allows the user to build highly complex polymer and metal parts via the layer-wise process.

This Special Issue seeks to showcase research papers, short communications, and review articles that focus on the investigation of the performances of novel microchannel geometries, novel developments in microfabrication techniques and novel experimental approaches. Moreover, comparisons between different cooling techniques (such as micro heat pipes, micro heat sinks, and micro heat exchangers) are welcome.

Dr. Pamela Vocale
Guest Editor

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Keywords

  • microsystems
  • new microfabrication techniques
  • additive manufacturing
  • micro thermal devices
  • microscale cooling techniques
  • heat transfer enhancement

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Published Papers (1 paper)

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Research

18 pages, 4112 KiB  
Article
Investigating Experimental and Computational Fluid Dynamics of 3D-Printed TPMS and Lattice Porous Structures
by Guru Varun Penubarthi, Kishore Bhaskar Suresh Babu, Senthilkumar Sundararaj and Shung Wen Kang
Micromachines 2025, 16(8), 883; https://doi.org/10.3390/mi16080883 - 29 Jul 2025
Abstract
This study investigates the capillary performance and wetting behavior of SLA (Stereolithography) 3D-printed porous structures, focusing on TPMS (triply periodic minimal surfaces)-Gyroid, Octet, Diamond, and Isotruss lattice designs. High-speed imaging was used to analyze droplet interactions, including penetration, spreading, and contact angles, with [...] Read more.
This study investigates the capillary performance and wetting behavior of SLA (Stereolithography) 3D-printed porous structures, focusing on TPMS (triply periodic minimal surfaces)-Gyroid, Octet, Diamond, and Isotruss lattice designs. High-speed imaging was used to analyze droplet interactions, including penetration, spreading, and contact angles, with 16 μL water droplets dropping from 30 mm at 0.77 m/s. Results showed variable contact angles, with Isotruss and Octet having higher angles, while Diamond faced measurement challenges due to surface roughness. Numerical simulations of TPMS-Gyroid of 2 mm3 unit cells validated the experimental results, and Diamond, Octet, and Isotruss structures were simulated. Capillary performance was assessed through deionized (DI) water weight–time (w-t) measurements, identifying that the TPMS-Gyroid structure performed adequately. Structures with 4 mm3 unit cells had low capillary performance, excluding them from permeability testing, whereas smaller 2 mm3 structures demonstrated capillary effects but had printability and cleaning issues. Permeability results indicated that Octet performed best, followed by Isotruss, Diamond, and TPMS-Gyroid. Findings emphasize unit cell size, beam thickness, and droplet positioning as key factors in optimizing fluid dynamics for cooling, filtration, and fluid management. Full article
(This article belongs to the Special Issue Micro Thermal Devices and Their Applications, 2nd Edition)
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