An experimental investigation of microstructure surface roughness on pool boiling characteristics of $${\mathrm{TiO}}_{2}$$ nanofluid

Roodbari, Mahdi; Alimoradi, Hasan; Shams, Mehrzad; Aghanajafi, Cyrus

doi:10.1007/s10973-021-10666-w

Cited by 18 publications

(6 citation statements)

References 51 publications

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“…Papers [ 1 , 2 , 3 ] dealing with pool boiling on extended surfaces, in the form of fins produced with machining techniques, indicate a considerable improvement in heat transfer when compared to a smooth surface. Similarly, studies dealing with boiling on rough surfaces generated with emery paper and other mechanical methods (e.g., [ 4 , 5 , 6 ]) prove that such rough heat exchangers dissipate higher heat fluxes in relation to a smooth reference surface. Consequently, the combination of both of these methods can be especially advantageous.…”

Section: Introductionmentioning

confidence: 89%

Laser Treatment of Surfaces for Pool Boiling Heat Transfer Enhancement

et al. 2023

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The laser treatment of surfaces enables the alteration of their morphology and makes them suitable for various applications. This paper discusses the use of a laser beam to develop surface features that enhance pool boiling heat transfer. Two types of structures (in the ‘macro’ and ‘micro’ scale) were created on the samples: microfins (grooves) and surface roughness. The impact of the pulse duration and scanning velocity on the height of the microfins and surface roughness at the bottom of the grooves was analyzed with a high precision optical profilometer and microscope. The results indicated that the highest microfins and surface roughness were obtained with a pulse duration of 250 ns and scanning velocity of 200 mm/s. In addition, the influence of the ‘macro’ and ‘micro’ scale modifications on the boiling heat transfer of distilled water and ethyl alcohol was studied on horizontal samples heated with an electric heater. The largest enhancement was obtained for the highest microfins and roughest surfaces, especially at small superheats. Heat flux dissipated from the samples containing microfins of 0.4 mm height was, maximally, over three times (for water) and two times (for ethanol) higher than for the samples with smaller microfins (0.2 mm high). Thus, a modification of a selected model of boiling heat transfer was developed so that it would be applicable to laser-processed surfaces. The correlation proved to be quite successful, with almost all experimental data falling within the ±100% agreement bands.

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Section: Introductionmentioning

confidence: 89%

Laser Treatment of Surfaces for Pool Boiling Heat Transfer Enhancement

et al. 2023

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“…Numerous studies have been devoted to nanofluids pool boiling [3][4][5][6][7][8][9]. Chandra et al [10] studied copper/water at concentrations of 0.25%, 0.5%, and 1% by weight on a 30 mm 2 steel surface.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Effects of Grooves in Fe2O4/Water Nanofluid Pool Boiling

Rashid,

Ali,

Zorah

et al. 2024

Fluids

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In this study, we systematically explored how changing groove surfaces of iron oxide/water nanofluid could affect the pool boiling heat transfer. We aimed to investigate the effect of three types of grooves, namely rectangular, circular, and triangular, on the boiling heat transfer. The goal was to improve heat transfer performance by consciously changing surface structure. Comparative analyses were conducted with deionized water to provide valuable insights. Notably, the heat transfer coefficient (HTC) exhibited a significant increase in the presence of grooves. For deionized water, the HTC rose by 91.7% and 48.7% on circular and rectangular grooved surfaces, respectively. Surprisingly, the triangular-grooved surface showed a decrease of 32.9% in HTC compared to the flat surface. On the other hand, the performance of the nanofluid displayed intriguing trends. The HTC for the nanofluid diminished by 89.2% and 22.3% on rectangular and triangular grooved surfaces, while the circular-grooved surface exhibited a notable 41.2% increase in HTC. These results underscore the complex interplay between groove geometry, fluid properties, and heat transfer enhancement in nanofluid-based boiling. Hence, we thoroughly examine the underlying mechanisms and elements influencing these observed patterns in this research. The results provide important insights for further developments in this area by shedding light on how surface changes and groove geometry may greatly affect heat transfer in nanofluid-based pool boiling systems.

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“…Recent research on the flow of nanofluids with different flow characteristics may be found in. [36][37][38][39][40][41] The nonlinear Casson-Maxwell liquid between two porous discs using the Buongiorno theory, using extra impacts of nonlinear heat transfer and chemical reactions, has yet to be researched, according to the literature review. The essential transformations are used to convert nonlinear coupled expressions to ordinary differentials.…”

Section: Introductionmentioning

confidence: 99%

“…Kumar et al 34 used von Karman's radiative hydromagnetic nanofluid flow between two coaxial rotating porous discs to generate entropy. On a linear permeable stretched surface, Gangadhar et al [36][37][38][39][40][41] explored the formation of entropy and the application of an angled magnetic field to Williamson nanoliquid. Recent research on the flow of nanofluids with different flow characteristics may be found in.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear radiation phenomena for Casson–Maxwell nanoliquid flow with chemical reactions

Gangadhar

Victoria²,

Lakshmi³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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The viscoelastic characteristics of an incompressible, axisymmetric Casson–Maxwell nanoliquid flow between two stationary discs were examined in this paper. Two porous discs are constrained for uniform injection. The Christov model is used in conjunction with the Buongiorno model. In an energy equation with a nonlinear form, thermal radiation characteristics are used. In the current continuation, the impact of chemical reactions is taken into account, making the work more adaptable. Using appropriate transformations, the constructed model was transformed into a dimensionless form. The solution is obtained by employing the FEM technique. The related parameters are described using physical results. The radial velocity distribution at the center line was reduced using a magnetic parameter and a Casson parameter. When the Brownian motion constant and radiation parameter are increased, the temperature distribution of nanoparticles enhances. Furthermore, the rate of the reaction increases in the presence of a chemical reaction. Pearson's correlation coefficient was used to discover a relationship between the Sherwood and Nusslet numbers. To determine the linear relationship between variables, the t-test method is used.

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An experimental investigation of microstructure surface roughness on pool boiling characteristics of $${\mathrm{TiO}}_{2}$$ nanofluid

Cited by 18 publications

References 51 publications

Laser Treatment of Surfaces for Pool Boiling Heat Transfer Enhancement

Laser Treatment of Surfaces for Pool Boiling Heat Transfer Enhancement

Experimental Investigation of the Effects of Grooves in Fe2O4/Water Nanofluid Pool Boiling

Nonlinear radiation phenomena for Casson–Maxwell nanoliquid flow with chemical reactions

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