Free convection of nanofluids in a porous sensible heat storage unit: Combined effect of time periodic heating and external magnetic field

Izadi, Mohsen; Alshuraiaan, Bader; Hajjar, Ahmad; Sheremet, Mikhail А.; Hamida, Mohamed Bechir Ben

doi:10.1016/j.ijthermalsci.2023.108404

Cited by 12 publications

(3 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[16] The convection heat transfer process is typically modeled by establishing dimensionless control equations and using a finite element numerical approach. [17][18][19][20] The melting process of phase-change material in the square cavity was evaluated using the enthalpy-porosity method. A higher temperature gradient was observed at the melting point, and the melting was accelerated by an increase in the heat transfer rate.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer and Melting Characteristics of Calcium‐Cored Wire in Molten Steel

Guo,

Chen,

2023

steel research int.

View full text Add to dashboard Cite

To accurately describe the heat transfer and melting characteristics of a calcium‐cored wire in molten steel, the finite difference method is used in theoretical calculations to solve the relationship between the melting temperature, radius, and time. Numerical simulations are performed using the Eulerian–Eulerian method to characterize the temperature distribution at different periods. The results show that the radius of the calcium wire and steel shell both decrease and the melting rate gradually increases. The calcium‐cored wire has a fish‐scale temperature distribution, with the temperature decreasing from a maximum at the front down to the tail end and increasing outward from the center axis. The temperature of the wire core is 1120 K at 0.272 s, indicating the complete melting of the pure internal calcium. The temperature of the calcium wire–steel shell interface reaches 1793 K at 0.979 s and remains from 1645 to 1757 K at the front of calcium wire. The steel shell melts through, and calcium flows into the molten steel in liquid form. The numerical simulation results generally agree with the theoretical calculations, and the reliability of the model is verified by comparison with published studies.

show abstract

Section: Introductionmentioning

confidence: 99%

Heat Transfer and Melting Characteristics of Calcium‐Cored Wire in Molten Steel

Guo,

Chen,

2023

steel research int.

View full text Add to dashboard Cite

show abstract

“…The average Nusselt number rises to 61% for Ra = 10 5 and 12% for Ra = 10 3 48 . When the magnetic field is ignored (Ha = 0), the dimensionless melting time increases by 266% when the Ha is imposed up to 500 49 . In comparison to α = 60°, the average Nusselt number for the position of the heat source and sink (α = − 60°) is up to 124.5% greater.…”

Section: Introductionmentioning

confidence: 99%

“…In comparison to α = 60°, the average Nusselt number for the position of the heat source and sink (α = − 60°) is up to 124.5% greater. The heat transfer coefficient rises by 11.45% at Re 4000 by adding 1% nanoparticle volume to the base fluid 49 . Tarikul et al 50 – 56 recently studied numerically MHD influence on free convective temperature distributions into the different nanofluids with different thermal conditions.…”

Section: Introductionmentioning

confidence: 99%

Heat generation/absorption effect on natural convective heat transfer in a wavy triangular cavity filled with nanofluid

Islam,

Alam,

Niazai

et al. 2023

Sci Rep

View full text Add to dashboard Cite

This study is numerically executed to investigate the influence of heat generation or absorption on free convective flow and temperature transport within a wavy triangular enclosure filled by the nanofluid taking the Brownian effect of nanoparticles. The water (H2O) is employed as base fluid and copper (Cu) as nanoparticles for making effective Cu–H2O nanofluids. The perpendicular sinusoidally wavy wall is cooled at low temperature while the horizontal bottom sidewall is heated non-uniformly (sinusoidal). The inclined wall of the enclosure is insulated. The governing dimensionless non-linear PDEs are executed numerically with the help of the Galerkin weighted residual type finite element technique. The numerically simulated results are displayed through average Nusselt number, isothermal contours, and streamlines for the various model parameters such as Hartmann number, Rayleigh number, heat generation or absorption parameter, nanoparticles volume fraction, and undulation parameter. The outcomes illustrate that the temperature transport rate augments significantly for the enhancement of Rayleigh number as well as nanoparticles volume fraction whereas reduces for the increment of Hartman number. The heat transfer is significantly influenced by the size, shape, and Brownian motion of the nanoparticles. The rate of heat transport increases by 20.43% considering the Brownian effect for 1% nanoparticle volume. The thermal performance increases by 8.66% for the blade shape instead of the spherical shape of nanoparticles. In addition, heat transfer is impacted by the small size of nanoparticles. The thermal transport rate increases by 35.87% when the size of the nanoparticles reduces from 100 to 10 nm. Moreover, the rate of heat transmission increases efficiently as the undulation parameter rises. It is also seen that a crucial factor in the flow of nanofluids and heat transmission is the heat generation/absorption parameter that influences temperature distribution, heat transfer rates, and overall thermal performance.

show abstract