Light-induced latent heat reduction of silver nanofluids: A molecular dynamics simulation

Zhao, Chang; An, Wei; Gao, Naiping

doi:10.1016/j.ijheatmasstransfer.2020.120343

Cited by 9 publications

(6 citation statements)

References 39 publications

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“…Zhao et al [106] Latent heat of vaporization (LHV) numerical simulation An electric field can reduce the LHV of nanofluid.…”

Section: Author Application Direction Research Methods Effectmentioning

confidence: 99%

“…Zhao et al [106] explored the localized surface plasmon resonance (LSPR) effect on the latent heat of vaporization (LHV) of silver nanofluids and found that the LHV of silver nanofluids is negatively correlated with the local enhanced electric field intensity on the surface of silver nanoparticles when there is the LSPR.…”

Section: Author Application Direction Research Methods Effectmentioning

confidence: 99%

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A Review on Heat Transfer of Nanofluids by Applied Electric Field or Magnetic Field

et al. 2020

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Nanofluids are considered to be a next-generation heat transfer medium due to their excellent thermal performance. To investigate the effect of electric fields and magnetic fields on heat transfer of nanofluids, this paper analyzes the mechanism of thermal conductivity enhancement of nanofluids, the chaotic convection and the heat transfer enhancement of nanofluids in the presence of an applied electric field or magnetic field through the method of literature review. The studies we searched showed that applied electric field and magnetic field can significantly affect the heat transfer performance of nanofluids, although there are still many different opinions about the effect and mechanism of heat transfer. In a word, this review is supposed to be useful for the researchers who want to understand the research state of heat transfer of nanofluids.

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“…Zhao et al [106] Latent heat of vaporization (LHV) numerical simulation An electric field can reduce the LHV of nanofluid.…”

Section: Author Application Direction Research Methods Effectmentioning

confidence: 99%

Section: Author Application Direction Research Methods Effectmentioning

confidence: 99%

A Review on Heat Transfer of Nanofluids by Applied Electric Field or Magnetic Field

et al. 2020

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“…The field enhancement coefficient can be increased as high as 2000 when the gap distance is 1 nm. Using the electromagnetic theory, , the intensity and period of the LSPR-induced EEF can be calculated as 3.5 × 10 –2 V/Å and 1.85 fs, respectively. Detailed information can be found in the Supporting Information.…”

Section: Simulations Of Nanobubble Formation Around Nanoparticlesmentioning

confidence: 99%

“…Hence, nanoparticles act not only as heat sources but also as charged particles under the illumination of incident lights. The LSPR-induced EEF can directly impact the motion of water molecules leading to their rapid transformation from the liquid state to the vapor state. , Although the role of the influence of the LSPR-induced EEF has not been widely investigated in relevant studies, this mechanism is significant for promoting the phase change process of nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Promotion of Nanobubble Formation around Light-Induced Plasmonic Nanoparticles: A Molecular Dynamics and Continuum Modeling Comparative Study

Zhao,

Sun,

Zheng

et al. 2023

J. Phys. Chem. C

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The nucleation threshold of nanobubble formation around the surface of nanoparticles with small sizes is significantly high under the irradiation of incident light, which has limited their applications in the fields of optofluidics and biomedicine. To solve this problem, nanoparticles are assembled into an array to investigate the generation process of nanobubbles around them under the impact of the localized surface plasmon resonance (LSPR)-induced enhanced electric field (EEF) by using molecular dynamics (MD) simulations and continuum equations. The results of MD simulations indicate that even if the nanoparticle temperature is close to the melting point, it is still difficult to generate nanobubbles around the surface of an individual nanoparticle with a radius of 2 nm. However, when nanoparticles are assembled into an array, the progressive nucleation and generation process of nanobubbles around their surface can be observed after a thermal diffusion process lasting approximately 1050 ps. When the LSPR effect is excited, water molecules can be rapidly transformed from the liquid state to the gaseous state under the perturbation of an intensive EEF, which can further promote the generation process of nanobubbles. Moreover, using the thermal diffusion equation with a modification of the interfacial thermal resistance, a detailed analysis is also conducted for the phase change process of the water region surrounding nanoparticles under the effect of the LSPR-induced EEF. Compared with the results of MD simulations, it can be observed that the modified thermal diffusion equation can clearly demonstrate the initial nucleation of nanobubbles around the surface of a nanoparticle array but the size of the generated nanobubble is slightly smaller. On this basis, the generation process of nanobubbles can be flexibly manipulated by adjusting the gap distance of an array, the number of nanoparticles in an array, and the polarization direction of the incident light. The results could provide a new approach to investigate the nucleation and generation process of nanobubbles, which makes them more attractive in various emerging applications.

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“…However, this electrons oscillation can become more violent under the LSPR effect which leads to an intensive enhanced electric field (EEF) near the surface of PNPs . Because the EEF can be directly imposed on surrounding media during the light-induced heating process, it causes the transformation of fluid molecules from the liquid state into the gaseous state . Due to no requirement for the thermal transport process, the effect of the EEF on water molecules is the direct energy deposition of the incident light into the water region.…”

Section: Introductionmentioning

confidence: 99%

A Molecular Dynamics Analysis on Interfacial Thermal Resistance between Particle and Medium in Light-Induced Heat Transfer of Plasmonic Nanofluid

Zhao

Zhang

et al. 2022

Langmuir

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Light-induced heat transfer process of plasmonic nanofluids is critical for many applications, but the energy conversion pathway still remains controversial. In this work, we develop a calculation model based on the combination of the electromagnetic theory and molecular dynamics (MD) simulation to investigate the impact of the localized surface plasmon resonance (LSPR) on the heat transfer between nanoparticles and the surrounding medium in gold and silver nanofluids. It is found that the LSPR-induced enhanced electric field (EEF) can obviously reduce the interfacial thermal resistance to promote the heat transfer process, especially in silver nanofluids. The results reveal that the movement of water molecules can be violently perturbed by the EEF to overcome the binding force of nanoparticles, and therefore the energy transfer process in water molecules can be obviously enhanced. The effect of EEF is significant, especially in the initial heating stages when the temperature of the nanoparticles is relatively low. When the silver nanoparticle temperature is 400 K, the relative reduction ratio of the interfacial thermal resistance can reach 19.0% under the effect of the LSPR-induced EEF. The results also indicate that two different energy conversion mechanisms: photothermal and photoexcited electric-field enhancement are likely to coexist and jointly impact the heat transfer process in plasmonic nanofluids, and the effect of the latter cannot be neglected. This work provides some new insights for a deeper understanding of the light-induced heat transfer process in plasmonic nanofluids.

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Light-induced latent heat reduction of silver nanofluids: A molecular dynamics simulation

Cited by 9 publications

References 39 publications

A Review on Heat Transfer of Nanofluids by Applied Electric Field or Magnetic Field

A Review on Heat Transfer of Nanofluids by Applied Electric Field or Magnetic Field

Promotion of Nanobubble Formation around Light-Induced Plasmonic Nanoparticles: A Molecular Dynamics and Continuum Modeling Comparative Study

A Molecular Dynamics Analysis on Interfacial Thermal Resistance between Particle and Medium in Light-Induced Heat Transfer of Plasmonic Nanofluid

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