A microchannel heat exchanger design for microelectronics cooling correlating the heat transfer rate in terms of Brinkman number

Park, HeeSung

doi:10.1007/s00542-009-0900-8

Cited by 11 publications

(5 citation statements)

References 10 publications

(14 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Fig. 1, the average Nusselt number determined in the tests #1, #2, and #3 is shown as a function of the Reynolds number and compared with the predictions of the Gnielinski correlation [33] (continuous line) and with the Sieder and Täte correlation [35] (dashed line) (12) By observing the data shown in Fig. 1, it is evident that the agreement between the experimental data and the Gnielinski correlation can be considered very good and their difference is within the typical data uncertainty for Nu estimated in Ref.…”

Section: Comparisons With Classical Correlationsmentioning

confidence: 99%

“…The paper of Demsis et al [11] about the experimental determination of the convective heat transfer coefficients in minitubes under rarefied conditions reported unusual low values of Nusselt number without any physical explanation. The papers of Park [12] and Mun and Kim [13] proposed new correlations for liquid flows in laminar regime through microchannels avoiding any theoretical justification of the need of these new correlations.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Guidelines for the Determination of Single-Phase Forced Convection Coefficients in Microchannels

Morini¹,

Yang

2013

Journal of Heat Transfer

View full text Add to dashboard Cite

This paper deals with the analysis of the main features of forced microconvection of liquid and gas flows through microchannels. A critical oveiyiew of the main effects that tends to play an important role in the determination of Nusselt number in microchannels is presented. Some experimental data obtained at the Microfluidics Lab of the University of Bologna together with the main results which appeared recently in the open literature both for liquids and gases are used in order to highlight the peculiar characteristics of the convective heat transfer through microchannels and to suggest the guidelines for a physically based interpretation to the experimental results. By means of speciflc examples, it is shown that the thermal behavior at microscale of gas and liquid flows through microchannels in terms of convective heat transfer coefficients can be strongly affected by scaling and micro-effects but also by practical issues linked to the geometry of the test rig, the real thermal boundary conditions, the presence of flttings, position and type of the sensors, and so on. All these aspects have to be taken into account during the data post processing in order to obtain a correct evaluation of the Nusselt numbers. It is also highlighted how it is always useful to couple to the experimental approach a complete computational thermal fluid-dynamics analysis of the whole tested microsystem in order to be able to recognize "a priori" the main effects which can play an important role on the convective heat transfer analysis. It is demonstrated in this paper that this "a priori" analysis is crucial in order to: (i) individuate the main parameters which influence the convective heat transfer coefficients (this is important for the development of new correlations); (ii) compare in a right way the conventional correlations with the experimental results.

show abstract

Section: Comparisons With Classical Correlationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Guidelines for the Determination of Single-Phase Forced Convection Coefficients in Microchannels

Morini¹,

Yang

2013

Journal of Heat Transfer

View full text Add to dashboard Cite

show abstract

“…These values are obtained from the simulations. The Nusselt number is then calculated using Equation (6), and the Fanning friction factor (f) is derived as shown in Equation (7). The average velocity of the fluid flow in the microchannel, the average temperature of the fluid, the channel wall temperature, the average fluid pressure at the inlet, and the flux entering the fluid is found out from simulation results and are used for calculating the Nusselt number and Reynolds number.…”

Section: Governing Equations and Parametersmentioning

confidence: 99%

“…Zhang and Lian observed in their work that the boiling heat transfer of a pressurized water reactor modified using the LIGA technique enhances its performance. Park designed and investigated the liquid microchannel heat exchangers with varying channel width and developed new correlations that are useful in designing the microchannel heat exchangers. Fan et al did two‐dimensional computational fluid dynamics simulations to investigate the effects of coolants on heat transfer capability in cooling applications with CNTs microfin architectures.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of microchannel with different pin fin layouts

Jadhav¹,

Pawar²

2019

Int J Numerical Modelling

View full text Add to dashboard Cite

A numerical analysis is carried out in this study to understand the effect of the different pin fin layouts in the microchannel heat sinks. The performance analysis is done using the conjugate heat transfer module of COMSOL Multiphysics software. Initially, a microchannel with elliptical pin fins of 500-μm fin height in it is validated with the results from the literature. Further, the performance of microchannels with three different pin fin layouts is compared with the baseline model. The investigation is done for different coolant inflow velocities, keeping the channel and pin fin dimensions constant, and the results are presented in terms of the Nusselt number and pressure drop. The highest value of 19.287 Nusselt number is obtained for case b with a maximum inlet velocity of 1 m/s. A maximum increment of 16.8% and a minimum increment of 11.1% in the Nusselt number is observed in case d and case a, respectively, with 0.2 m/s inlet velocity. The minimum value of the pressure drop is observed in case d. From the results obtained in this study, it is concluded that a staggered pin fin orientation in the microchannel enhances the thermal performance better than inline arrangement. K E Y W O R D Smicrochannel heat sink, numerical analysis, Nusselt number, pressure drop, pin fin layout

show abstract

“…Air cooling friction losses may lead to a decrease of electric power system efficiency, so liquid cooling thermal management applications have attracted extensive interest for its better thermal conductivity [120,121]. Compared to air cooling, this guiding structural liquid cooling thermal management method for E-motors can ensure high performance with a heat transfer coefficient increase by 60% [122].…”

Section: Electric Machine Coolingmentioning

confidence: 99%

Advances in Integrated Vehicle Thermal Management and Numerical Simulation

et al. 2017

View full text Add to dashboard Cite

Abstract:With the increasing demands for vehicle dynamic performance, economy, safety and comfort, and with ever stricter laws concerning energy conservation and emissions, vehicle power systems are becoming much more complex. To pursue high efficiency and light weight in automobile design, the power system and its vehicle integrated thermal management (VITM) system have attracted widespread attention as the major components of modern vehicle technology. Regarding the internal combustion engine vehicle (ICEV), its integrated thermal management (ITM) mainly contains internal combustion engine (ICE) cooling, turbo-charged cooling, exhaust gas recirculation (EGR) cooling, lubrication cooling and air conditioning (AC) or heat pump (HP). As for electric vehicles (EVs), the ITM mainly includes battery cooling/preheating, electric machines (EM) cooling and AC or HP. With the rational effective and comprehensive control over the mentioned dynamic devices and thermal components, the modern VITM can realize collaborative optimization of multiple thermodynamic processes from the aspect of system integration. Furthermore, the computer-aided calculation and numerical simulation have been the significant design methods, especially for complex VITM. The 1D programming can correlate multi-thermal components and the 3D simulating can develop structuralized and modularized design. Additionally, co-simulations can virtualize simulation of various thermo-hydraulic behaviors under the vehicle transient operational conditions. This article reviews relevant researching work and current advances in the ever broadening field of modern vehicle thermal management (VTM). Based on the systematic summaries of the design methods and applications of ITM, future tasks and proposals are presented. This article aims to promote innovation of ITM, strengthen the precise control and the performance predictable ability, furthermore, to enhance the level of research and development (R&D).

show abstract

A microchannel heat exchanger design for microelectronics cooling correlating the heat transfer rate in terms of Brinkman number

Cited by 11 publications

References 10 publications

Guidelines for the Determination of Single-Phase Forced Convection Coefficients in Microchannels

Guidelines for the Determination of Single-Phase Forced Convection Coefficients in Microchannels

Performance analysis of microchannel with different pin fin layouts

Advances in Integrated Vehicle Thermal Management and Numerical Simulation

Contact Info

Product

Resources

About