Numerical investigation of pool nucleate boiling in nanofluid with lattice Boltzmann method

Rostamzadeh, Afsaneh; Jafarpur, Khosrow; Rad, Ebrahim Goshtsbi

doi:10.15632/jtam-pl.54.3.811

Cited by 15 publications

(7 citation statements)

References 50 publications

(27 reference statements)

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“…The predictions of the models relying on the vapor-liquid exchange notion differ significantly from tangible results [12,13]. The use of nanofluid as an alternative of base fluid enhances the heat transfer coefficient applying the Lattice Boltzmann method [14,15]. The computational fluid dynamics (CFD) approach was used to forecast the heat transfer coefficient at a high heat flux [16].…”

Section: Of 20mentioning

confidence: 99%

Developing a Mathematical Model for Nucleate Boiling Regime at High Heat Flux

Danish

Mesfer

2019

Processes

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A mathematical model has been developed for heat exchange in nucleate boiling at high flux applying an energy balance on a macrolayer. The wall superheat, macrolayer thickness, and time are the parameters considered for predicting the heat flux. The influence of the wall superheat and macrolayer thickness on average heat flux has been predicted. The outcomes of the current model have been compared with Bhat’s constant macrolayer model, and it was found that these models are in close agreement corresponding to the nucleate pool boiling regime. It was concluded that the wall superheat and macrolayer thickness contributed significantly to conduction heat transfer. The average conduction heat fluxes predicted by the current model and by Bhat’s model are in close agreement for a thinner macrolayer of approximately 50 µm. For higher values of the wall superheat, which corresponds to the nucleate pool boiling condition, the predicted results strongly agree with the results of Bhat’s model. The findings also validate the claim that conduction across the macrolayer accounts for the main heat transfer mode from the heater surface to boiling liquid at high heat flux in nucleate pool boiling.

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Section: Of 20mentioning

confidence: 99%

Developing a Mathematical Model for Nucleate Boiling Regime at High Heat Flux

Danish

Mesfer

2019

Processes

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“…thermal conductivity) of the working fluid [1]. As stated by many researchers, an increase in the amount of generated bubbles in the liquid media accounts for the increases not just on nucleation sites, but also convective (boiling) heat transfer coefficient [2][3][4]. The unary and hybrid nanofluids have been utilized as working fluid in many thermal systems by many researchers and the common idea is that nanofluids, in general, enhance the thermophysical properties of the base fluid they were added, and hence, provides an efficient heat transfer.…”

Section: Introductionmentioning

confidence: 96%

Su Esaslı Seyreltik Fe+ZnO Hibrit Nanoakışkanının Düşük Isı Akısı Şartında Havuz Kaynama Isı Transferi Özellikleri: Sayısal Bir Çalışma

Çiftçi

2021

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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Thermophysical properties of the working fluid of a fluid-driven heat transfer system is the key parameter in determination of heat transfer performance of the system they were used. The nanofluids, nanoparticles containing colloidal suspensions, have been extensively used for performance enhancement in many applications, however, the nanoparticles cannot have both high thermal conductivity and good stability simultaneously. To provide these characteristics together, hybrid utilization of nanoparticles has emerged. In this numerical study, pool boiling heat transfer characteristics of dilute Fe+ZnO/deionized water hybrid nanofluid were investigated under low heat flux condition (50 W). The hybrid nanofluid suspension at the volumetric rate of 0.5% and Fe+ZnO combination of (50:50) were taken into account. For numerical simulations, Computational Fluid Dynamics approach and Volume-of-Fluid multiphase model were employed. Vapor volume fractions and velocity vectors in fluid medium were obtained for deionized water, and the hybrid nanofluid aforementioned. The startup of the bubbles and departures with time were investigated for each working fluid. Under the same conditions, the start-up time of the boiling for deionized water and dilute hybrid nanofluid were observed as 468. and 441. seconds, respectively. The numerical findings also displayed that hybrid nanofluids can be used for pool boiling implementations in order to provide improved heat transfer characteristics.

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“…Going into the literature, one may find that heat transfer analysis of nanofluid flows has been a hot topic among scientists over the past decade. Examples include the studies of Ali et al (2014), Ghasemi et al (2016), and Rostamzadeh et al (2016).…”

Section: Introductionmentioning

confidence: 99%

Natural and mixed convection of a nanofluid in porous cavities: critical analysis using Buongiorno’s model

Zahmatkesh¹,

Habibi²

2019

Journal of Theoretical and Applied Mechanics

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In this paper, Buongiorno's mathematical model is adopted to simulate both natural convection and mixed convection of a nanofluid in square porous cavities. The model takes into account the Brownian diffusion and thermophoresis effects. Both constant and variable temperatures are prescribed at the side walls while the remaining walls are maintained adiabatic. Moreover, all boundaries are assumed to be impermeable to the base fluid and the nanoparticles. The governing equations are transformed to a form of dimensionless equations and then solved numerically using the finite-volume method. Thereafter, effects of the Brownian diffusion parameter, the thermophoresis number, and the buoyancy ratio on the flow strength and the average Nusselt number as well as distributions of isocontours of the stream function, temperature, and nanoparticles fraction are presented and discussed.

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Numerical investigation of pool nucleate boiling in nanofluid with lattice Boltzmann method

Cited by 15 publications

References 50 publications

Developing a Mathematical Model for Nucleate Boiling Regime at High Heat Flux

Developing a Mathematical Model for Nucleate Boiling Regime at High Heat Flux

Su Esaslı Seyreltik Fe+ZnO Hibrit Nanoakışkanının Düşük Isı Akısı Şartında Havuz Kaynama Isı Transferi Özellikleri: Sayısal Bir Çalışma

Natural and mixed convection of a nanofluid in porous cavities: critical analysis using Buongiorno’s model

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