Flow regimes of Rayleigh–Bénard convection in a vertical magnetic field

Zürner, Till; Schindler, Felix; Vogt, Tobias; Eckert, Sven; Schumacher, Jörg

doi:10.1017/jfm.2020.264

Cited by 40 publications

(88 citation statements)

References 43 publications

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“…Similar flow transformations were detected in the recent measurements of Zürner et al. (2020) and in the simulations of Liu et al. (2018), Yan et al.…”

Section: Resultssupporting

confidence: 88%

“…The simulation results are consistent with the recent extensive measurements of RBC with a vertical magnetic field in a cylinder with moderate and by Zürner et al. (2019, 2020).…”

Section: Introductionsupporting

confidence: 92%

“…However, the measurements of Zürner et al. (2020) for show a line with higher slope for a wide range of and . The discrepancy with this result and the presence of even stronger deviations in experimental data for moderate can be attributed to the limitations of the ultrasound Doppler velocimetry used to probe the flow field discussed by Zürner et al.…”

Section: Resultsmentioning

confidence: 84%

“…The universal scaling behaviour of and was proposed by Zürner et al. (2020). To verify this hypothesis, we plot and versus in logarithmic scales.…”

Section: Resultsmentioning

confidence: 86%

“…The effect of a vertical magnetic field on RBC has been studied experimentally (Nakagawa 1957; Cioni, Chaumat & Sommeria 2000; Aurnou & Olson 2001; Burr & Müller 2001; King & Aurnou 2015; Zürner et al. 2020), numerically (Liu, Krasnov & Schumacher 2018; Yan et al. 2019; Akhmedagaev et al.…”

Section: Introductionmentioning

confidence: 99%

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Turbulent Rayleigh–Bénard convection in a strong vertical magnetic field

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“…Similar flow transformations were detected in the recent measurements of Zürner et al. (2020) and in the simulations of Liu et al. (2018), Yan et al.…”

Section: Resultssupporting

confidence: 88%

“…The simulation results are consistent with the recent extensive measurements of RBC with a vertical magnetic field in a cylinder with moderate and by Zürner et al. (2019, 2020).…”

Section: Introductionsupporting

confidence: 92%

Section: Resultsmentioning

confidence: 84%

“…The universal scaling behaviour of and was proposed by Zürner et al. (2020). To verify this hypothesis, we plot and versus in logarithmic scales.…”

Section: Resultsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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Turbulent Rayleigh–Bénard convection in a strong vertical magnetic field

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Multiphysics‐Enabled Liquid State Thermal Harvesting: Synergistic Effects between Pyroelectricity and Triboelectrification

et al. 2021

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Energy consumption levels show a never‐ending increase since the industrial era. Toward sustainability objectives, it is of outstanding importance to reduce the amount of wasted energy, that typically comes as waste heat, as a consequence of nonunitary efficiency of any thermodynamic process. Herein, a breakthrough in conversion of low enthalpy heat into electricity is presented, based on a liquid state device that operates through multiphysics effects: thermomagnetic advection, triboelectricity, pyroelectricity, and Ludwig–Sorét effect. A synergistic interaction between ferroelectric surfaces and a complex composition colloidal suspension is evidenced, owing to an enhancement of the generated potential of 365% in comparison with pyroelectric effect and 267% in comparison with triboelectric effect, while the current extracted is 54% higher than the pyroelectric effect only and the power extracted by induction remains substantially unperturbed. The impact of this technology on society is also analyzed, on the basis of a set of practical applications, by means of a computational analysis.

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Stability analysis of wall‐attached Bénard–Marangoni convection in a vertical magnetic field

Boeck

2023

Proc Appl Math and Mech

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The threshold for the onset of thermocapillary flow in a planar liquid layer heated from below is increased by a vertical magnetic field when the liquid is a good electric conductor. The magnetic damping effect is reduced when the induced eddy currents are blocked by insulating side walls. Neutral conditions for this specific Bénard–Marangoni stability problem with a vertical field and side walls are obtained numerically for three‐dimensional perturbations assumed periodic in one horizontal direction. The domain is bounded by a free‐slip wall at the bottom, a free surface at the top and two free‐slip lateral walls in the other horizontal direction. Buoyancy forces and surface deformations are neglected and a constant heat flux is imposed on the free surface. Upon increasing the magnetic induction, the least stable modes become localized near the side walls and the convective threshold increases at a lower rate than for the least stable bulk mode.

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Flow regimes of Rayleigh–Bénard convection in a vertical magnetic field

Cited by 40 publications

References 43 publications

Turbulent Rayleigh–Bénard convection in a strong vertical magnetic field

Turbulent Rayleigh–Bénard convection in a strong vertical magnetic field

Multiphysics‐Enabled Liquid State Thermal Harvesting: Synergistic Effects between Pyroelectricity and Triboelectrification

Stability analysis of wall‐attached Bénard–Marangoni convection in a vertical magnetic field

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