Results 41 to 50 of about 637,657 (352)
Optimal Design and Operation of Dual-Ejector PEMFC Hydrogen Supply and Circulation System
Energies, 2022 A proton exchange membrane fuel cell (PEMFC) system requires an adequate hydrogen supply and circulation to achieve its expected performance and operating life.
Li Chen +4 more
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Hamiltonian approach to hybrid plasma models [PDF]
, 2010 The Hamiltonian structures of several hybrid kinetic-fluid models are identified explicitly, upon considering collisionless Vlasov dynamics for the hot particles interacting with a bulk fluid.
Cesare Tronci +8 more
core +1 more source
New conserved vorticity integrals for moving surfaces in multi-dimensional fluid flow [PDF]
J. Math. Fluid Mech. 15 (2013), 439-451, 2012 For inviscid fluid flow in any n-dimensional Riemannian manifold, new conserved vorticity integrals generalizing helicity, enstrophy, and entropy circulation are derived for lower-dimensional surfaces that move along fluid streamlines. Conditions are determined for which the integrals yield constants of motion for the fluid.
arxiv +1 more source
TO THE QUESTION OF CONTROL OF HYDRAULIC MODES OF THE HEAT NETWORK
International Journal of Advanced Studies, 2019 The mathematical modeling program Computational fluid dynamics is used. Research allows you to take into account all the factors affecting changes in hydrostatic pressure, to study the interaction process of the circulation pump, make-up unit and the ...
Alexey Andreevich Alekseev +1 more
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Velocity circulation intermittency in finite-temperature turbulent superfluid helium [PDF]
arXiv, 2022 We study intermittency of circulation moments in turbulent superfluid helium by using experimental grid turbulence and numerical simulations of the Hall-Vinen-Bekarevich-Khalatnikov model. More precisely, we compute the velocity circulation $\Gamma_r$ in loops of size $r$ laying in the inertial range.
arxiv
Material derivatives of higher dimension in geophysical fluid dynamics
Meteorologische Zeitschrift, 2004 The familiar operator D/Dt in fluid dynamics defines the material derivative for a fluid particle with dimension zero. In this paper we define and use "macroscopic" or multidimensional material derivatives D1/Dt, D2/Dt and D3/Dt.
Heinz Fortak
doaj +1 more source
Vortex Gas Modeling of Turbulent Circulation Statistics [PDF]
Phys. Rev. E 102, 041102 (2020), 2020 Statistical properties of circulation encode relevant information about the multi-scale structure of turbulent cascades. Recent massive computational efforts have posed challenging theoretical issues, as the dependence of circulation moments upon Reynolds numbers and length scales, and the specific shape of the heavy-tailed circulation probability ...
arxiv +1 more source
Conservation of the circulation for the Euler and Euler-Leray equations [PDF]
Phys. Rev. Fluids 4, 084401 (2019), 2019 It is well-known that the circulation of the velocity field of a fluid along a closed material curve is conserved for any solution of the Euler equation. We offer a slightly more explicit proof of that fact than that generally found in the literature.
arxiv +1 more source
Computational fluid dynamic simulations of a cavopulmonary assist device for failing Fontan circulation [PDF]
The Journal of Thoracic and Cardiovascular Surgery, 2019 Adult patients who have undergone the Fontan procedure are highly vulnerable to gradual, progressive circulatory failure, and options to reverse this situation are few. A cavopulmonary assist device could decongest the venous and lymphatic systems, overcome elevated pulmonary vascular resistance, increase cardiac output, and support some of these ...
S. Lucy Roche +6 more
openaire +3 more sources
Cerebrospinal fluid dynamics along the optic nerve
Frontiers in Neurology, 2022 The cerebrospinal fluid (CSF) plays an important role in delivering nutrients and eliminating the metabolic wastes of the central nervous system. An interrupted CSF flow could cause disorders of the brain and eyes such as Alzheimer's disease and glaucoma.
Jinqiao Sheng +4 more
doaj +1 more source