Thermo-hydraulic performance of a circular microchannel heat sink using swirl flow and nanofluid

Ali, Abdullah Masoud; Rona, Aldo; Kadhim, Hakim T.; Angelino, Matteo; Gao, Shian

doi:10.1016/j.applthermaleng.2021.116817

Cited by 48 publications

(16 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…which models the distribution of temperature T s through the solid walls, with the timeaveraged Navier-Stokes equations, which model the coolant [8]. The coolant is represented as a Newtonian fluid using either a single-phase approach or the two-phase mixture model approach.…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…where h 0 , h 0r , s, and s r are the specific stagnation enthalpy, the specific stagnation enthalpy at T r , the specific entropy, and the specific entropy at T r , respectively. The contribution to the flow exergy owing to gravity is disregarded, as the inlet and the outlet of the minichannel are horizontally aligned [8]. The constant property incompressible flow assumption in the single-phase and two-phase mixture models enables restating Equation ( 29) as…”

Section: The Second Law Efficiency Analysis Of the Minichannel Heat S...mentioning

confidence: 99%

“…By combining the exergy destruction rate and the rate of exergy expended, the second law efficiency of the minichannel heat sink is determined as [8].…”

Section: The Second Law Efficiency Analysis Of the Minichannel Heat S...mentioning

confidence: 99%

“…For example, Bhattacharya, et al [5] examined the laminar forced convective heat transfer of Al 2 O 3 nanofluid in a microchannel heat sink of a rectangular cross-section and found the addition of nanoparticles to be more beneficial to cooling at a lower Reynolds number. Nebbati and Kadja [6] and Ali, et al [7,8] modelled Al 2 O 3 nanofluid in a microchannel heat sink and showed that the nanofluids can increase the Nusselt number and reduce the heat sink contact surface temperature compared to water, at an acceptable through-flow pressure drop penalty.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Physically Consistent Implementation of the Mixture Model for Modelling Nanofluid Conjugate Heat Transfer in Minichannel Heat Sinks

2022

Self Cite

View full text Add to dashboard Cite

As much as two-phase mixture models resolve more physics than single-phase homogeneous models, their inconsistent heat transfer predictions have limited their use in modelling nanofluid cooled minichannel heat sinks. This work investigates, addresses, and solves this key shortcoming, enabling reliable physically sound predictions of minichannel nanoflows, using the two-phase mixture model. It does so by applying the single-phase and the two-phase mixture model to a nine-passages rectangular minichannel, 3 mm deep and 1 mm wide, cooled by a 1% by volume suspension of Al2O3 nanoparticles in water, over the Reynolds number range 92 to 455. By varying the volume fraction of the second phase between 2% and 50%, under a constant heat flux of 16.67 W/cm2 and 30 Celsius coolant inflow, it is shown that the two-phase mixture model predicts heat transfer coefficient, pressure loss, friction factor, exergy destruction rate, exergy expenditure rate, and second law efficiency values converging to the single-phase model ones at increasing . A two-phase mixture model defined with 1% second phase volume fraction and 100% nanoparticles volume fraction in the second phase breaks the Newtonian fluid assumption within the model and produces outlier predictions. By avoiding this unphysical regime, the two-phase mixture model matched experimental measurements of average heat transfer coefficient to within 1.76%. This has opened the way for using the two-phase mixture model with confidence to assess and resolve uneven nanoparticle dispersion effects and increase the thermal and mass transport performance of minichannels.

show abstract

Section: Mathematical Formulationmentioning

confidence: 99%

Section: The Second Law Efficiency Analysis Of the Minichannel Heat S...mentioning

confidence: 99%

“…By combining the exergy destruction rate and the rate of exergy expended, the second law efficiency of the minichannel heat sink is determined as [8].…”

Section: The Second Law Efficiency Analysis Of the Minichannel Heat S...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Physically Consistent Implementation of the Mixture Model for Modelling Nanofluid Conjugate Heat Transfer in Minichannel Heat Sinks

2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Where: Dh is the hydraulic diameter, q is the heat flux, Tw is the average temperature of the heating surface of the solid inner wall, Tm is the bulk temperature of fluid A Figure of Merit (FOM) is used to evaluate the overall thermohydraulic performance by considering economy and operation efficiency [11,12]. It is determined as:…”

Section: Materials Physical Parameters and Evaluation Criteriamentioning

confidence: 99%

Numerical Simulation Of Heat Transfers Synergistic Performance Of He/S-CO2 Mixture Gas With The Heat Transfer Enhancement Structure On The First Wall Of Fusion Reactor

Wang²,

Zhou

et al. 2022

Preprint

View full text Add to dashboard Cite

As a new cooling medium, Helium/ Supercritical Carbon Dioxide (He / S-CO2) binary mixture gas can effectively improve the heat transfer capability. In this paper, the heat transfers synergistic performance of He / S-CO2 with fins structure were numerically simulated by ANSYS / CFD method. The results show that the pressure drop in the channel decreases gradually with the increase of volume fraction of S-CO2. Comparing with smooth channel, fin structure can significantly improve the intensity of convective heat transfer intensity, the average Nusselt number of flow channel with finger fins are increased by 80%. The heat transfer efficiency of He/S-CO2 binary mixture gas coupled with heat transfer enhancement structure (triangular fins) is increased by 310% at the condition of volume ratio of S-CO2 to He with 2:1. Further study on the optimized scheme of first wall (FW) of International Thermonuclear Experimental Reactor (ITER) China Helium-Cooled Ceramic Breeder-Test Blanket Module (HCCB-TBM) show that triangular fins are placed on the inner surface of FW faced deuterium-tritium plasma, and the optimized distance between fin pitches is 7 ~ 10mm. The results can provide meaningful references for the cooling scheme design of the FW in ITER.

show abstract

Enhancing the Performance of Latent Heat Thermal Energy Storage using Different Configurations and Designs of Heat Transfer Pipes

Ali,

Bagdanavicius

2024

Lecture Notes in Mechanical Engineering

View full text Add to dashboard Cite

Thermo-hydraulic performance of a circular microchannel heat sink using swirl flow and nanofluid

Cited by 48 publications

References 59 publications

Physically Consistent Implementation of the Mixture Model for Modelling Nanofluid Conjugate Heat Transfer in Minichannel Heat Sinks

Physically Consistent Implementation of the Mixture Model for Modelling Nanofluid Conjugate Heat Transfer in Minichannel Heat Sinks

Numerical Simulation Of Heat Transfers Synergistic Performance Of He/S-CO2 Mixture Gas With The Heat Transfer Enhancement Structure On The First Wall Of Fusion Reactor

Enhancing the Performance of Latent Heat Thermal Energy Storage using Different Configurations and Designs of Heat Transfer Pipes

Contact Info

Product

Resources

About