Results 11 to 20 of about 2,917 (170)
Beltrami fields and knotted vortex structures in incompressible fluid flows
Bulletin of the London Mathematical Society, Volume 55, Issue 3, Page 1059-1103, June 2023., 2023 Abstract This paper gives a survey on recent results about the existence of knotted vortex structures in incompressible fluids. This includes the proof of Lord Kelvin's conjecture on the existence of knotted vortex tubes in steady Euler flows and a new probabilistic approach to address Arnold's speculation that typical Beltrami fields should exhibit ...
Alberto Enciso, Daniel Peralta‐Salas
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Mathematical Problems in Engineering, Volume 2023, Issue 1, 2023., 2023 This paper presents the study of time‐fractional nonlinear fifth‐order Korteweg–de Vries equations by utilizing an adequate novel technique, namely, the q‐homotopy analysis transform method. The fifth‐order Korteweg–de Vries equation has got its importance in the study of magneto‐sound propagation in plasma, capillary gravity water waves, and the ...
D. G. Prakasha +5 more
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Implementation and validation of guiding centre approximation into ERO2.0
Contributions to Plasma Physics, Volume 62, Issue 5-6, June‐July 2022., 2022 Abstract The Monte‐Carlo code ERO2.0 uses full orbit resolution to follow impurity particles throughout the plasma volume to determine the local erosion and deposition fluxes on the plasma‐facing components of fusion devices in magnetic confinement fusion.
Sebastian Rode +5 more
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Theory of stellar convection – II. First stellar models [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 We present here the first stellar models on the Hertzsprung-Russell diagram (HRD), in which convection is treated according to the novel scale-free convection theory (SFC theory) by Pasetto et al. (2014). The aim is to compare the results of the new theory with those from the classical, calibrated mixing-length (ML) theory to examine differences and ...
Pasetto, S +4 more
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Nuclear Fusion Pattern Recognition by Ensemble Learning
Complexity, Volume 2021, Issue 1, 2021., 2021 Nuclear fusion is the process by which two or more atomic nuclei join together to form a single heavier nucleus. This is usually accompanied by the release of large quantities of energy. This energy could be cheaper, cleaner, and safer than other technology currently in use.
G. Farias +6 more
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Stellar Theory for Flag Complexes [PDF]
MATHEMATICA SCANDINAVICA, 2016 Refining a basic result of Alexander, we show that two flag simplicial complexes are piecewise linearly homeomorphic if and only if they can be connected by a sequence of flag complexes, each obtained from the previous one by either an edge subdivision or its inverse.
Lutz, Frank H., Nevo, Eran
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Stellar Convection Theory [PDF]
International Astronomical Union Colloquium, 1980 This meeting, which deals with turbulence in stars, opens with a review on thermal convection. There is no better way to state from the start that among all instabilities that are likely to arise in stars, it is thermal convection which is the most firmly established as a cause for the turbulence that we observe on their surface. Our confidence in this
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Contributions to Plasma Physics, Volume 60, Issue 5-6, June-July 2020., 2020 Abstract Advanced divertor configurations modify the magnetic geometry of the divertor to achieve a combination of strong magnetic flux expansion, increased connection length and higher divertor volume—to improve detachment stability, neutral/impurity confinement and heat‐channel broadening.
Thomas Body +4 more
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Integration of kinetic ions in a three‐dimensional Monte‐Carlo neutral transport code
Contributions to Plasma Physics, Volume 60, Issue 5-6, June-July 2020., 2020 Abstract Charged particles of species different from the major constituents of a plasma might not reach local thermodynamic equilibrium during their lifespan. Such low collisional ions render the often‐used fluid description, assuming Maxwellian velocity distribution, as insufficient. Hence, kinetic treatment of such minorities becomes inevitable.
Friedrich Schluck
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Theory of Stellar Coronae [PDF]
Symposium - International Astronomical Union, 1987 X-ray observations have shown in recent years that the existence of high temperature plasmas in stellar atmospheres is far more widespread than extrapolated from preexisting theories of the solar and stellar coronae, forcing a radical change in our understanding of the mechanisms of coronal physics.
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