Experimental and Numerical Investigations of Impingement Air Jet for a Heat Sink

Yakut, Rıdvan; Yakut, Kenan; Yeşildal, Faruk; Karabey, Altuğ

doi:10.1016/j.proeng.2016.08.331

Cited by 21 publications

(6 citation statements)

References 3 publications

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“…Numerical predictions based on k-ε reliable turbulence model were in good coherence with experimental results. The Nusselt number correlations obtained from the experimental and numerical results were very close to each other and had a high accuracy rate [13].…”

Section: Introductionsupporting

confidence: 60%

“…Moreover, ANSYS k-ԑ model options were used for numerical analysis. The model was preferred because it yielded convergent results in previous studies comparing the experimental and numerical results [10,13,21,22]. The analyses were performed for three different nozzle diameters (D=50, 63, and 75mm), 4 different flow velocities, and three different heat fluxes (q=2222, 3333, 4444 W/m 2 ) for the heat sink.…”

Section: Methodsmentioning

confidence: 99%

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Numerical Determination Of Cooling Performance On Heat Sink Using Impingement Jet

Karabey

AL-ANI

2023

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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The use of impingement jet technics drew significant attention of researchers in the recent period. In this method, significant heat transfer rates are achieved. The present study examined the cooling performance of the fin pairs, which are aligned in a consecutively enlarging-contracting pattern and have a rectangular geometry, on a heat sink. The target geometry was optimized in the previous study by using the Taguchi method. The analyses were performed using four different impingement jet velocities (10, 12, 14, and 16 m/sec.), three different nozzle diameters (D=50, 63, and 75 mm), three different heat flux values (q=2222, 3333, and 4444 W/m2), and constant nozzle-to-target distance (h/d=1) were analyzed. These results were simulated numerically by using the ANSYS Fluent software. The k-ε realizable turbulence model was selected as the best model. The numerical results showed that the mean Nusselt number is directly proportional to the increase in the Reynolds number. The Nusselt number also increased with the increasing nozzle diameter value. The results are illustrated graphically (Nu-Re) in the present study. The peak value of the local Nusselt number was found to be at the stagnation point.

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Section: Introductionsupporting

confidence: 60%

Section: Methodsmentioning

confidence: 99%

Numerical Determination Of Cooling Performance On Heat Sink Using Impingement Jet

Karabey

AL-ANI

2023

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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“…Both models for Design 1 and 3 are in high agreement (less than 2% difference) whereas the models for Design 2 have a higher difference. The comparisons indicate a good confidence level of the heat exchanger CFD models, where acceptable simulations using Ansys-Fluent turbulence model usually have less than 10 % maximum difference [33].…”

Section: Validation Of Cfd Modelmentioning

confidence: 73%

Integrated Heat Regenerator (IHR) Designs with Hydrogen Preheater and Thermoelectric Generator for Power Enhancement of a 2 kW Fuel Cell Vehicle

Mohamed

Hamdan

Zamri

et al. 2022

IJIE

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The power train efficiency of fuel cell vehicles (FCV) can be enhanced by improving the hydrogen energy utilization. Based on a mini FCV running on a 2 kW open-cathode Polymer Electrolyte Membrane (PEM) fuel cell, a waste heat recovery system design needs to be developed as an approach towards higher energy efficiency. The novelty of the system is on the integration of thermoelectric generator technology with hydrogen preheating process for a combined heat and power output. This manuscript presents the proposed integrated heat regenerator (IHR) designs, analysed using numerical computational modelling. Three IHR designs were proposed where the main design criteria are (i) a minimum of 10oC hydrogen preheating degree, and (ii) non-parasitic active cooling for the Thermoelectric generator (TEG) cells. Three design concepts were studied to identify its design and performance limitations. The numerical results were validated with theoretical modelling analysis for hydrogen exit temperatures and TEG surface temperatures. The analysis on predicted fuel cell power enhancement, TEG power generation and waste heat utilization were performed by relating the temperature profiles of the hydrogen reactant and TEG surfaces to fuel cell reaction models and TEG power relationships. A compact IHR design that produced 7.7 to 8 % total power enhancement and suitable in size for a mini FCV was identified for future development works

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“…25 Dolayısıyla Filistin'den başlayan Amvas Vebası, daha sonra Şam bölgesinin tamamına yayıldı. 26 Hatta Irak bölgesi olan Basra'ya da sıçradı. 27 Fakat Mekke ve Medine bu salgından etkilenmedi.…”

Section: İ S T E Munclassified

Amvâs Plague During The Khalifa Omar Period

Öner¹

2020

İstem

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Experimental and Numerical Investigations of Impingement Air Jet for a Heat Sink

Cited by 21 publications

References 3 publications

Numerical Determination Of Cooling Performance On Heat Sink Using Impingement Jet

Numerical Determination Of Cooling Performance On Heat Sink Using Impingement Jet

Integrated Heat Regenerator (IHR) Designs with Hydrogen Preheater and Thermoelectric Generator for Power Enhancement of a 2 kW Fuel Cell Vehicle

Amvâs Plague During The Khalifa Omar Period

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