Numerical feasibility study of using ultrasonic surface vibration as a new technique for thermal management of the electronic devices

Shahsavar, Amin; Ghazizade–Ahsaee, Hossein; Askari, Ighball Baniasad; Setareh, Milad

doi:10.1016/j.enconman.2022.116481

Cited by 7 publications

(1 citation statement)

References 29 publications

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“…Cooling system design for thermal management and safety operating of heat transfer (HT) devices become an important topic. Especially, in the field of electronics, huge amount of heat is dissipated within a limited volume which should be removed as fast and as efficiently as possible for safety operation requirements (Shahsavar et al , 2023; Mozafari et al , 2021). In batteries, operation at higher temperatures is a risk for the failure of the system and fires/explosion in the workplace (Can et al , 2022).…”

Section: Introductionmentioning

confidence: 99%

Conductive panel cooling by using coupled effects of nano-jet impingement, double rotating cylinders and magnetic field under cross-flow

Selimefendigil,

Oztop

2024

HFF

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Purpose This study aims to examine the effects of cross-flow and multiple jet impingement on conductive panel cooling performance when subjected to uniform magnetic field effects. The cooling system has double rotating cylinders. Design/methodology/approach Cross-flow ratios (CFR) ranging from 0.1 to 1, magnetic field strength (Ha) ranging from 0 to 50 and cylinder rotation speed (Rew) ranging from −5,000 to 5,000 are the relevant parameters that are included in the numerical analysis. Finite element method is used as solution technique. Radial basis networks are used for the prediction of average Nusselt number (Nu), average surface temperature of the panel and temperature uniformity effects when varying the impacts of cross-flow, magnetic field and rotations of the double cylinder in the cooling channel. Findings The effect of CFR on cooling efficiency and temperature uniformity is favorable. By raising the CFR to the highest value under the magnetic field, the average Nu can rise by up to 18.6%, while the temperature drop and temperature difference are obtained as 1.87°C and 3.72°C. Without cylinders, magnetic field improves the cooling performance, while average Nu increases to 4.5% and 8.8% at CR = 0.1 and CR = 1, respectively. When the magnetic field is the strongest with cylinders in channel at CFR = 1, temperature difference (ΔT) is obtained as 2.5 °C. The rotational impacts on thermal performance are more significant when the cross-flow effects are weak (CFR = 0.1) compared to when they are substantial (CFR = 1). Cases without a cylinder have the worst performance for both weak and severe cross-flow effects, whereas using two rotating cylinders increases cooling performance and temperature uniformity for the conductive panel. The average surface temperature lowers by 1.2°C at CFR = 0.1 and 0.5°C at CFR = 1 when the worst and best situations are compared. Originality/value The outcomes are relevant in the design and optimization-based studies for electric cooling, photo-voltaic cooling and battery thermal management.

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Section: Introductionmentioning

confidence: 99%

Conductive panel cooling by using coupled effects of nano-jet impingement, double rotating cylinders and magnetic field under cross-flow

Selimefendigil,

Oztop

2024

HFF

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Numerical comparison of hydrothermal performance and entropy generation features of micro pin fin heat sinks with different multi-dimensional stepnesses

Shahsavar,

Mohammadnazar,

Ali

2024

J Therm Anal Calorim

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Effect of twisted rib on the hydrothermal performance and entropy generation behavior in minichannel heat sinks cooled by biologically synthesized Ag/water nanofluid

Shahsavar,

Hasani,

Yıldız

et al. 2024

J Therm Anal Calorim

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This numerical research study focuses on impacts of using twisted rib geometry on the hydrothermal performance and entropy generation characteristics of biologically synthesized Ag/water nanofluid flowing in heat sink ‌minichannels. To this end, twelve different twisted rib geometries (Case 1 to 12) were designed where the double-row ribs were twisted at the bottom and top portions with twist angles between − 45° and + 45°. To elucidate the cooling performance comprehensively, four different Reynolds numbers (Re = 500, 1000, 1500, and 2000) and four different nanoparticle concentrations ($$ \varphi \hspace{0.17em}$$ φ = 0%, 0.1%, 0.5%, and 1%) were included in the numerical computations. Results revealed that using twisted ribs significantly smoothen the fluid flow and reduces pressure drop remarkably depending on twist angles, nevertheless, it deteriorates the cooling performance. In Case 12, the convective heat transfer coefficient reduces by up to 15.8% at Re = 2000 and $$ \varphi$$ φ =1%, compared to the base case. However, pumping power requirement is decreased by 43.9% in this case. Nanoparticle incorporation contributes to enhancement of convective heat transfer coefficient by up to 13.5% at the lowest Re. Frictional entropy generation considerably decreases (up to 31%) when twisted ribs are utilized. However, thermal entropy generation can increase up to 36%, due to ineffective cooling with twisted ribs. This work can be regarded as a first study in the field concerning the effects of top and bottom twist angles on hydrothermal performance and entropy generation in nanofluid-cooled mini-channel heat sinks.

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Numerical feasibility study of using ultrasonic surface vibration as a new technique for thermal management of the electronic devices

Cited by 7 publications

References 29 publications

Conductive panel cooling by using coupled effects of nano-jet impingement, double rotating cylinders and magnetic field under cross-flow

Conductive panel cooling by using coupled effects of nano-jet impingement, double rotating cylinders and magnetic field under cross-flow

Numerical comparison of hydrothermal performance and entropy generation features of micro pin fin heat sinks with different multi-dimensional stepnesses

Effect of twisted rib on the hydrothermal performance and entropy generation behavior in minichannel heat sinks cooled by biologically synthesized Ag/water nanofluid

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