Conjugate Heat Transfer and Fluid Flow Modeling for Liquid Microjet Impingement Cooling with Alternating Feeding and Draining Channels
Liquid microjet impingement cooling has shown the potential to be the solution for heat removal from electronic devices such as very-large-scale integration (VLSI) chips. The post-impingement dynamics of the jet, specifically the interaction between the liquid fronts on the surface engendered by the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-08-01
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| Series: | Fluids |
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| Online Access: | https://www.mdpi.com/2311-5521/4/3/145 |
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| author | Tiwei Wei Herman Oprins Vladimir Cherman Eric Beyne Martine Baelmans |
| author_facet | Tiwei Wei Herman Oprins Vladimir Cherman Eric Beyne Martine Baelmans |
| author_sort | Tiwei Wei |
| collection | DOAJ |
| description | Liquid microjet impingement cooling has shown the potential to be the solution for heat removal from electronic devices such as very-large-scale integration (VLSI) chips. The post-impingement dynamics of the jet, specifically the interaction between the liquid fronts on the surface engendered by the jets is a critical criterion improving the heat transfer characteristics. While some seminally important experimental studies have investigated this attribute, the amount of accurate data and analysis is limited by the shortcomings of real-life experiments. In this article, numerical investigations into the fluid dynamics and heat transfer in microjet cooling systems are carried out. Specifically, this paper addresses the question regarding the necessary fidelity of the simulations. Different Reynolds-averaged Navier−Stokes (RANS) models are compared to the Large Eddy Simulations (LES) simulation and the potential fidelity of different eddy-viscosity-based closures is clearly shown. Recommendations are made regarding the RANS closures that should give the best performance. It is demonstrated that the transition Shear Stress Transport (SST) model and <inline-formula> <math display="inline"> <semantics> <mi>k</mi> </semantics> </math> </inline-formula>-<inline-formula> <math display="inline"> <semantics> <mi>ω</mi> </semantics> </math> </inline-formula> SST model both show excellent ability to predict the local or average Nu, and also local level pressure coefficient <inline-formula> <math display="inline"> <semantics> <mi>f</mi> </semantics> </math> </inline-formula> with less than 5% difference in the range of 30 < Re<sub>d</sub> < 4000, compared with the reference LES model. For the experimental measurements in the range of 130 < Re<sub>d</sub> < 1400, the LES model, transition SST model and <inline-formula> <math display="inline"> <semantics> <mi>k</mi> </semantics> </math> </inline-formula>-<inline-formula> <math display="inline"> <semantics> <mi>ω</mi> </semantics> </math> </inline-formula> SST model all show less than 25% prediction error. Moreover, it is shown that the validity of the unit cell assumption for the temperature and flow distribution depends on the flow rate. |
| first_indexed | 2024-04-12T08:19:26Z |
| format | Article |
| id | doaj.art-f91d07f3a26240138b1cfbebb65b98f6 |
| institution | Directory Open Access Journal |
| issn | 2311-5521 |
| language | English |
| last_indexed | 2024-04-12T08:19:26Z |
| publishDate | 2019-08-01 |
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| spelling | doaj.art-f91d07f3a26240138b1cfbebb65b98f62022-12-22T03:40:41ZengMDPI AGFluids2311-55212019-08-014314510.3390/fluids4030145fluids4030145Conjugate Heat Transfer and Fluid Flow Modeling for Liquid Microjet Impingement Cooling with Alternating Feeding and Draining ChannelsTiwei Wei0Herman Oprins1Vladimir Cherman2Eric Beyne3Martine Baelmans4IMEC, Kapeldreef 75, 3001 Leuven, BelgiumIMEC, Kapeldreef 75, 3001 Leuven, BelgiumIMEC, Kapeldreef 75, 3001 Leuven, BelgiumIMEC, Kapeldreef 75, 3001 Leuven, BelgiumDepartment of Mechanical Engineering, KU Leuven, Celestijnenlaan 300, 3001 Leuven, BelgiumLiquid microjet impingement cooling has shown the potential to be the solution for heat removal from electronic devices such as very-large-scale integration (VLSI) chips. The post-impingement dynamics of the jet, specifically the interaction between the liquid fronts on the surface engendered by the jets is a critical criterion improving the heat transfer characteristics. While some seminally important experimental studies have investigated this attribute, the amount of accurate data and analysis is limited by the shortcomings of real-life experiments. In this article, numerical investigations into the fluid dynamics and heat transfer in microjet cooling systems are carried out. Specifically, this paper addresses the question regarding the necessary fidelity of the simulations. Different Reynolds-averaged Navier−Stokes (RANS) models are compared to the Large Eddy Simulations (LES) simulation and the potential fidelity of different eddy-viscosity-based closures is clearly shown. Recommendations are made regarding the RANS closures that should give the best performance. It is demonstrated that the transition Shear Stress Transport (SST) model and <inline-formula> <math display="inline"> <semantics> <mi>k</mi> </semantics> </math> </inline-formula>-<inline-formula> <math display="inline"> <semantics> <mi>ω</mi> </semantics> </math> </inline-formula> SST model both show excellent ability to predict the local or average Nu, and also local level pressure coefficient <inline-formula> <math display="inline"> <semantics> <mi>f</mi> </semantics> </math> </inline-formula> with less than 5% difference in the range of 30 < Re<sub>d</sub> < 4000, compared with the reference LES model. For the experimental measurements in the range of 130 < Re<sub>d</sub> < 1400, the LES model, transition SST model and <inline-formula> <math display="inline"> <semantics> <mi>k</mi> </semantics> </math> </inline-formula>-<inline-formula> <math display="inline"> <semantics> <mi>ω</mi> </semantics> </math> </inline-formula> SST model all show less than 25% prediction error. Moreover, it is shown that the validity of the unit cell assumption for the temperature and flow distribution depends on the flow rate.https://www.mdpi.com/2311-5521/4/3/145microjet coolinghigh powercomputational fluid dynamics (CFD)Reynolds-averaged Navier–Stokes (RANS)Large Eddy Simulations (LES)transient Shear Stress Transport (SST) |
| spellingShingle | Tiwei Wei Herman Oprins Vladimir Cherman Eric Beyne Martine Baelmans Conjugate Heat Transfer and Fluid Flow Modeling for Liquid Microjet Impingement Cooling with Alternating Feeding and Draining Channels Fluids microjet cooling high power computational fluid dynamics (CFD) Reynolds-averaged Navier–Stokes (RANS) Large Eddy Simulations (LES) transient Shear Stress Transport (SST) |
| title | Conjugate Heat Transfer and Fluid Flow Modeling for Liquid Microjet Impingement Cooling with Alternating Feeding and Draining Channels |
| title_full | Conjugate Heat Transfer and Fluid Flow Modeling for Liquid Microjet Impingement Cooling with Alternating Feeding and Draining Channels |
| title_fullStr | Conjugate Heat Transfer and Fluid Flow Modeling for Liquid Microjet Impingement Cooling with Alternating Feeding and Draining Channels |
| title_full_unstemmed | Conjugate Heat Transfer and Fluid Flow Modeling for Liquid Microjet Impingement Cooling with Alternating Feeding and Draining Channels |
| title_short | Conjugate Heat Transfer and Fluid Flow Modeling for Liquid Microjet Impingement Cooling with Alternating Feeding and Draining Channels |
| title_sort | conjugate heat transfer and fluid flow modeling for liquid microjet impingement cooling with alternating feeding and draining channels |
| topic | microjet cooling high power computational fluid dynamics (CFD) Reynolds-averaged Navier–Stokes (RANS) Large Eddy Simulations (LES) transient Shear Stress Transport (SST) |
| url | https://www.mdpi.com/2311-5521/4/3/145 |
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