Flow dynamics and heat transfer characteristics analysis for floatation nozzle using large eddy simulation and proper orthogonal decomposition method

Huang, Ting; Diao, Simian; Huang, Zhigao; Zhang, Yun; Zhou, Huamin

doi:10.1016/j.ijthermalsci.2020.106402

Cited by 9 publications

(3 citation statements)

References 49 publications

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“…Therefore, in this numerical work, we have used the K-epsilon turbulence model in order to have higher simulation accuracy. In this article, we have evaluated the two previous simulation works 50,51 with the aim of validating them in order to gain sufficient confidence about the quality of the presented simulation work. Fortunately, validation has resulted in an ideal match with the intended work (See Figure 4).…”

Section: Resultsmentioning

confidence: 99%

Effect of two different nano-particles (GO-MoS₂) and a new micro-sprayer model on power electronic module for thermal management

Gholinia

Javidan

Hosseinpour

2022

Advances in Mechanical Engineering

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In this work, we have studied the performance of the cooling system with the presence of graphene oxide (GO) and molybdenum sulfide (MoS2) nanoparticles to reduce heat stress, increase the final efficiency, and maintain the reliability of Diode and IGBT electronic module. Beyond the geometric design of micro-sprays and dimensional changes, as well as the type of cooling fluid effect, the use of nanofluids for the purpose of thermal management of electronic systems will be an interesting and effective innovation. In the simulation parameters, the dimensional ratio of micro-sprays, the rate of cooling flows, and the volume fraction of nanoparticles were investigated. According to the results, considering the spray of the BSM-4N model and the input mass rate of 0.04 kg/s, by increasing the volume fraction of nanoparticles from 0.01 to 0.05, the heat transfer of nanofluid increases, thus leading to an increase in thermal efficiency. In this paper, the thermal effects of GO nanoparticle were significantly more favorable than those of MoS2 nanoparticle. In addition, it was found that by reducing the spray nozzle using installing the blade and simultaneous use of GO nanofluid with volume fraction of 0.05, the temperature inside the module is reduced below 323 K.

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Section: Resultsmentioning

confidence: 99%

Effect of two different nano-particles (GO-MoS₂) and a new micro-sprayer model on power electronic module for thermal management

Gholinia

Javidan

Hosseinpour

2022

Advances in Mechanical Engineering

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“…Firstly, the convergence verification of flow snapshot should be carried out. Referring to the article of Tianlun Huang [33], When the energy ratio of each mode varies little under different flow field snapshots, the number of flow field snapshots is considered to converge.…”

Section: Verification Of Modal Convergencementioning

confidence: 99%

Analysis of flow structure of tunnel fire based on modal decomposition

Chen

Murai

2022

THERM SCI

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In order to study the large scale flow structure of fire smoke in tunnels, this paper uses the excellent ability of proper orthogonal decomposition (POD) for the first time to extract flow field structure, processes the flow field data obtained from numerical simulation, obtains the two-dimensional and three-dimensional large scale flow structure of fire smoke in tunnels and analyzes it. The pod decomposition of temperature and velocity pulsation field shows that the proportion of first-order modal energy in temperature field is much higher than that in velocity field, indicating that the flow structure of velocity field is more complex than that of temperature field. Through modal phase analysis and modal decomposition of three-dimensional flow field, the influence of mode on fire smoke flow is recognized, and the understanding of tunnel fire smoke flow structure is deepened. The low-order mode is closely related to smoke flow. The increase of fire power has little effect on the reconstruction of flow field, and the cross-section energy recovery ratio near the fire source is higher under the same fire power.

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“…Such a zone imposes a dynamic load on the target surface and contributes to the heat transfer. 34 The complexity of the employment of multiple jets stems mainly from the orientation of the nozzles, nozzle geometry, and the interaction between adjacent jet streams. Thus far, although the flow characteristics of multiple jets have been described, the interaction between a moving plate and multiple jet streams has rarely been explained.…”

Section: Introductionmentioning

confidence: 99%

Effect of flow on heat transfer between a translating plate and gas discharged from multiple inclined slot nozzles

Kang,

Yin,

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The presented study aims to reveal flow and heat transfer characteristics as a translating aluminum plate is impinged by high-temperature gas discharged from inclined slot nozzles. The computational fluid dynamics (CFD) and the fluid-solid interaction (FSI) techniques were used to simulate the impingement process. A comprehensive comparison of flow, heat transfer, and structural parameters was implemented. The results indicate that twin vortices are produced between the two inclined nozzles. When the velocity ratio increases from 0.1 to 1.0, the vortex at the left expands, while the right one is compressed. Meanwhile, average Nusselt number and the pressure coefficient exhibit opposite variation tendencies. The highest average pressure coefficient of 0.45 arises at a velocity ratio of 0.5. As the plate-nozzle distance increases, characteristic flow structures are developed, and the distributions of temperature and the pressure coefficient are uniformized. The maximum Nusselt number decreases from 473 to 266 when the nondimensional plate-nozzle distance increases from 4 to 8. Large deformation occurs at the middle part of the plate. High equivalent stress is concentrated at the front and rear ends of the plate, which is insensitive to the velocity ratio and the plate-nozzle distance.

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Flow dynamics and heat transfer characteristics analysis for floatation nozzle using large eddy simulation and proper orthogonal decomposition method

Cited by 9 publications

References 49 publications

Effect of two different nano-particles (GO-MoS₂) and a new micro-sprayer model on power electronic module for thermal management

Effect of two different nano-particles (GO-MoS₂) and a new micro-sprayer model on power electronic module for thermal management

Analysis of flow structure of tunnel fire based on modal decomposition

Effect of flow on heat transfer between a translating plate and gas discharged from multiple inclined slot nozzles

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Flow dynamics and heat transfer characteristics analysis for floatation nozzle using large eddy simulation and proper orthogonal decomposition method

Cited by 9 publications

References 49 publications

Effect of two different nano-particles (GO-MoS2) and a new micro-sprayer model on power electronic module for thermal management

Effect of two different nano-particles (GO-MoS2) and a new micro-sprayer model on power electronic module for thermal management

Analysis of flow structure of tunnel fire based on modal decomposition

Effect of flow on heat transfer between a translating plate and gas discharged from multiple inclined slot nozzles

Contact Info

Product

Resources

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Effect of two different nano-particles (GO-MoS₂) and a new micro-sprayer model on power electronic module for thermal management

Effect of two different nano-particles (GO-MoS₂) and a new micro-sprayer model on power electronic module for thermal management