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Nanomaterials
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Heat Transfer in Nanocomposites: Theoretical Research and Application
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Heat Transfer in Nanocomposites: Theoretical Research and Application

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Theory and Simulation of Nanostructures".

Deadline for manuscript submissions: closed (25 January 2023) | Viewed by 5259

Special Issue Editor

Prof. Dr. Mohd Zulkifly Abdullah

E-Mail Website
Guest Editor
School of Mechanical Engineering, Universiti Sains Malaysia, Penang, Malaysia
Interests: heat transfer; nanofluids; molecular dynamics; combustion; electronic packaging

Special Issue Information

Dear Colleague,

Heat transfer in nanocomposites is inspiring significant research findings in different research disciplines, including material engineering, thermal fluids, materials physics, and computer simulation. Different methods and applications are currently being studied, including nanofillers, nanotube, nanoplatelets, polymer nanocomposites, nanocompounds, and other nanostructure to enhance heat transfer. The studies associated with heat management applications, thermal interface materials, and nanocomposites with improved thermal properties are fascinating and challenging research topics, which are expected to explore a unique future research field.

This Special Issue of Heat Transfer in Nanocomposites focuses on theoretical, experimental, and computational modeling research contributions that cover the most recent advances in heat transfer related issues.

Prof. Dr. Mohd Zulkifly Abdullah
Guest Editor

Manuscript Submission Information

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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. Nanomaterials 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 2900 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

  • thermal conductivity
  • heat convection
  • nanoscale heat transfer
  • thermal interface materials
  • nanoparticles
  • nanocompound
  • nanostructure
  • nanofluids

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Published Papers (4 papers)

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Research

21 pages, 5721 KiB  
Article
Thermophysical Properties of Vegetable Oil-Based Hybrid Nanofluids Containing Al2O3-TiO2 Nanoparticles as Insulation Oil for Power Transformers
by Vignesh Vicki Wanatasanappan, Munirah Rezman and Mohd Zulkifly Abdullah
Nanomaterials 2022, 12(20), 3621; https://doi.org/10.3390/nano12203621 - 15 Oct 2022
Cited by 16 | Viewed by 2619
Abstract
The massive demand in the electrical power sector has resulted in a large demand for reliable, cost efficient, and environmentally friendly insulation oil to reduce the dependency on mineral oil. The hybridization of nanoparticles in vegetable oil is a novel method to enhance [...] Read more.
The massive demand in the electrical power sector has resulted in a large demand for reliable, cost efficient, and environmentally friendly insulation oil to reduce the dependency on mineral oil. The hybridization of nanoparticles in vegetable oil is a novel method to enhance the thermal properties of vegetable oil. This study focuses on the experimental investigation of the thermophysical properties of coconut oil, soybean oil, and palm oil-based hybrid nanofluids suspended with Al2O3-TiO2 nanoparticles at a mass concentration of 0.2, 0.4, and 0.6%. The ratio between Al2O3 and TiO2 nanoparticles was maintained constant at 50:50. The main purpose of the study is to evaluate the thermal conductivity, dynamic viscosity, and density of different vegetable base oils suspended with Al2O3-TiO2 in the temperature range of 30 to 60 °C. The influence of temperature on the augmentation of thermophysical properties for different vegetable oil-based hybrid nanofluids is investigated experimentally. The experimental results for thermal conductivity for the three types of base fluids show that the effect of nanoparticle mass concentration in thermal conductivity enhancement is less significant for temperatures more than 50 °C. The palm oil with a 0.6% Al2O3-TiO2 nanoparticle concentration exhibited the highest thermal conductivity with a 27.5% thermal conductivity enhancement relative to the base oil. The effect of nanofluid temperature on density and viscosity augmentation is more distinct compared with the impact of Al2O3-TiO2 nanoparticles concentrations. Among all three types of hybrid nanofluids, palm oil based nanofluids were found to have superior thermophysical properties compared with coconut oil and soybean oil, with the highest thermal conductivity of 0.628 W/m·k and lowest viscosity of 17.772 mPa·s. Full article
(This article belongs to the Special Issue Heat Transfer in Nanocomposites: Theoretical Research and Application)
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23 pages, 7116 KiB  
Article
Effect of Hybrid Nanofluids Concentration and Swirling Flow on Jet Impingement Cooling
by Ooi Jen Wai, Prem Gunnasegaran and Hasril Hasini
Nanomaterials 2022, 12(19), 3258; https://doi.org/10.3390/nano12193258 - 20 Sep 2022
Cited by 10 | Viewed by 2194
Abstract
Nanofluids have become increasingly salient in heat transfer applications due to their promising properties that can be tailored to meet specific needs. The use of nanofluids in jet impingement flows has piqued the interest of numerous researchers owing to the significant heat transfer [...] Read more.
Nanofluids have become increasingly salient in heat transfer applications due to their promising properties that can be tailored to meet specific needs. The use of nanofluids in jet impingement flows has piqued the interest of numerous researchers owing to the significant heat transfer enhancement, which is vital in the technological dependence era in every aspect of life, particularly in engineering applications and industry. The aim of this current work is to investigate the effect of hybrid nanofluids concentration and swirling flow on jet impingement cooling through experimental approach. The hybrid nanofluids are prepared through a two-step method and the characterization process is carried out to study the stability and morphological structure of the sample prepared. The prepared hybrid nanofluids are then used as a cooling agent to evaluate the heat transfer performance of jet impinging system. The experimental investigation compares the performance of swirling impinging jets (SIJs) with conventional impinging jets (CIJs) under various jet-to-plate distance (H/D) ratios and nanofluid concentrations. The effects of adding surfactant on nanofluids are also examined. The heat transfer performance of ZnO/water and CuO/water mono-nanofluids are used as comparison to ZnO-CuO/water hybrid nanofluid. The results show that the thermal performance of ZnO-CuO/water hybrid nanofluid is better than that of the mono-nanofluids. Furthermore, as the mass fraction increases, the heat transfer rates improve. The effect of heat transmission by swirling impinging jets is better than that of conventional impinging jets under similar operating conditions. At H/D = 4, Re = 20,000 and hybrid nanofluid concentration at 0.1% under SIJ is observed to have the highest overall Nusselt number. Full article
(This article belongs to the Special Issue Heat Transfer in Nanocomposites: Theoretical Research and Application)
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16 pages, 6401 KiB  
Article
The Transitional Wettability on Bamboo-Leaf-like Hierarchical-Structured Si Surface Fabricated by Microgrinding
by Ping Li, Jinxin Wang, Jiale Huang and Jianhua Xiang
Nanomaterials 2022, 12(16), 2888; https://doi.org/10.3390/nano12162888 - 22 Aug 2022
Cited by 3 | Viewed by 2193
Abstract
Stabilizing the hydrophobic wetting state on a surface is essential in heat transfer and microfluidics. However, most hydrophobic surfaces of Si are primarily achieved through microtexturing with subsequent coating or modification of low surface energy materials. The coatings make the hydrophobic surface unstable [...] Read more.
Stabilizing the hydrophobic wetting state on a surface is essential in heat transfer and microfluidics. However, most hydrophobic surfaces of Si are primarily achieved through microtexturing with subsequent coating or modification of low surface energy materials. The coatings make the hydrophobic surface unstable and impractical in many industrial applications. In this work, the Si chips’ wettability transitions are yielded from the original hydrophilic state to a stable transitional hydrophobic state by texturing bamboo-leaf-like hierarchical structures (BLHSs) through a diamond grinding wheel with one-step forming. Experiments showed that the contact angles (CAs) on the BLHS surfaces increased to 97° and only reduced by 2% after droplet impacts. This is unmatched by the current texturing surface without modification. Moreover, the droplets can be split up and transferred by the BLHS surfaces with their 100% mass. When the BLHS surfaces are modified by the low surface energy materials’ coating, the hydrophobic BLHS surfaces are upgraded to be superhydrophobic (CA > 135°). More interestingly, the droplet can be completely self-sucked into a hollow micro-tube within 0.1 s without applying external forces. A new wetting model for BLHS surfaces based on the fractal theory is determined by comparing simulated values with the measured static contact angle of the droplets. The successful preparation of the bamboo-leaf-like Si confirmed that transitional wettability surfaces could be achieved by the micromachining of grinding on the hard and brittle materials. Additionally, this may expand the application potential of the key semiconductor material of Si. Full article
(This article belongs to the Special Issue Heat Transfer in Nanocomposites: Theoretical Research and Application)
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13 pages, 2092 KiB  
Article
Influence of Nanoparticles on Thermophysical Properties of Hybrid Nanofluids of Different Volume Fractions
by Mohd Zulkifly Abdullah, Kok Hwa Yu, Hao Yuan Loh, Roslan Kamarudin, Prem Gunnasegaran and Abdusalam Alkhwaji
Nanomaterials 2022, 12(15), 2570; https://doi.org/10.3390/nano12152570 - 27 Jul 2022
Cited by 12 | Viewed by 1790
Abstract
Nanofluids are frequently employed in numerous heat transfer applications due to their improved thermophysical properties compared to a base fluid. By selecting suitable combinations of nanoparticles, hybrid nanofluids can have better thermophysical properties than mono nanofluids. Thus, this study examines the effect of [...] Read more.
Nanofluids are frequently employed in numerous heat transfer applications due to their improved thermophysical properties compared to a base fluid. By selecting suitable combinations of nanoparticles, hybrid nanofluids can have better thermophysical properties than mono nanofluids. Thus, this study examines the effect of volume fractions of hybrid nanofluids on different thermophysical properties, such as density, thermal conductivity, specific heat, and dynamic viscosity. Thermophysical properties of copper–nickel (Cu–Ni) water-based hybrid nanofluids are determined using molecular dynamic (MD) simulation for different volume fractions of 0.1–0.3%. Results show that the density, thermal conductivity, and viscosity of Cu–Ni hybrid nanofluids increase with volume fraction, whereas the specific heat capacity at a constant pressure decreases with volume fraction. These properties are validated for the base fluid, mono nanofluids, and hybrid nanofluids. Results are in good agreement with previous findings. The thermophysical properties of Cu–Ni hybrid nanofluids significantly improve and have better characteristics for cooling fluids than the base fluid. Full article
(This article belongs to the Special Issue Heat Transfer in Nanocomposites: Theoretical Research and Application)
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