Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Frederic P. Schuller"'
Autor:
Frederic P. Schuller, Marcus C. Werner
Publikováno v:
Universe, Vol 3, Iss 3, p 52 (2017)
We consider light propagation in a spacetime whose kinematics allow weak birefringence, and whose dynamics have recently been derived by gravitational closure. Revisiting the definitions of luminosity and angular diameter distances in this setting, w
Externí odkaz:
https://doaj.org/article/ffdc682740ae4afd801354ddc896893d
Publikováno v:
IFAC-PapersOnLine. 54:173-179
In this paper we address the modeling of incompressible Navier-Stokes equations in the port-Hamiltonian framework. Such model not only allows describing the energy dissipation due to viscous effects but also incorporates the non-zero energy exchange
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d7677bc36f488883fcd4729f6048676
https://doi.org/10.1016/j.ifacol.2021.11.074
https://doi.org/10.1016/j.ifacol.2021.11.074
Publikováno v:
The Fifteenth Marcel Grossmann Meeting.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0172126ad02c3029f65ed5491c389372
https://doi.org/10.1142/9789811258251_0090
https://doi.org/10.1142/9789811258251_0090
Publikováno v:
Journal of geometry and physics, 164:104199. Elsevier
Journal of Geometry and Physics
Journal of Geometry and Physics
Part I of this paper presented a systematic derivation of the Stokes Dirac structure underlying the port-Hamiltonian model of ideal fluid flow on Riemannian manifolds. Starting from the group of diffeomorphisms as a configuration space for the fluid,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11f37b7596c6d42dd0cf5132a98fb8b4
https://research.utwente.nl/en/publications/dbf8ae79-a0c5-4d13-803d-6e063f11f5a7
https://research.utwente.nl/en/publications/dbf8ae79-a0c5-4d13-803d-6e063f11f5a7
Publikováno v:
Physics of Fluids
Physics of fluids, 33(4):047114. American Institute of Physics
Physics of fluids, 33(4):047114. American Institute of Physics
A port-Hamiltonian model for compressible Newtonian fluid dynamics is presented in entirely coordinate-independent geometric fashion. This is achieved by use of tensor-valued differential forms that allow to describe describe the interconnection of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98b743b054119fdda29f5c47637322ca
http://www.scopus.com/inward/record.url?scp=85104111915&partnerID=8YFLogxK
http://www.scopus.com/inward/record.url?scp=85104111915&partnerID=8YFLogxK
Publikováno v:
Journal of geometry and physics, 175:104477. Elsevier
We introduce the geometric structure underlying the port-Hamiltonian models for distributed parameter systems exhibiting moving material domains. The first part of the paper aims at introducing the differential geometric tools needed to represent inf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0269e07f30c7de2550f334c746e3d109
Publikováno v:
Journal of geometry and physics, 164:104201. Elsevier
Journal of Geometry and Physics
Journal of Geometry and Physics
In this two-parts paper, we present a systematic procedure to extend the known Hamiltonian model of ideal inviscid fluid flow on Riemannian manifolds in terms of Lie-Poisson structures to a port-Hamiltonian model in terms of Stokes-Dirac structures.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::96a47228f16cc00b4751fd3c0cf90538
http://arxiv.org/abs/2012.01818
http://arxiv.org/abs/2012.01818
Autor:
Frederic P. Schuller
Constructive gravity allows to calculate the Lagrangian for gravity, provided one previously prescribes the Lagrangian for all matter fields on a spacetime geometry of choice. We explain the physical and mathematical foundation of this result and poi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::203b1c257ecc09f7aff9b03a063917bf
Publikováno v:
Physical Review D. 97
The requirement that both the matter and the geometry of a spacetime canonically evolve together, starting and ending on shared Cauchy surfaces and independently of the intermediate foliation, leaves one with little choice for diffeomorphism-invarian
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ced3981983cc52ccf176805a4bb0521b
https://doi.org/10.1103/physrevd.97.084036
https://doi.org/10.1103/physrevd.97.084036
Publikováno v:
Annals of Physics
Area metric manifolds emerge as a refinement of symplectic and metric geometry in four dimensions, where in numerous situations of physical interest they feature as effective matter backgrounds. In this article, this prompts us to identify those area
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10ab370b1ba9a2fdc0c3cffc7ee27f05
https://doi.org/10.1016/j.aop.2010.04.008
https://doi.org/10.1016/j.aop.2010.04.008