Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Morten Brøns"'
Publikováno v:
Water, Vol 16, Iss 4, p 544 (2024)
We study electrohydrodynamic (EHD) linear (in)stability of microfluidic channel flows, i.e., the stability of interface between two shearing viscous (perfect) dielectrics exposed to an electric field in large aspect ratio microchannels. We then apply
Externí odkaz:
https://doaj.org/article/4b846ab69d6d48878df194f03ed87cb4
Publikováno v:
Journal of Fluid Mechanics. 940
We explore the two-dimensional flow past a cylinder undergoing forced transversal oscillations with the aim of elucidating the evolution of the topology of the wake under variation of the forcing amplitude at a Reynolds number of 100. In particular,
Publikováno v:
Chaos (Woodbury, N.Y.). 32(1)
Mixed-mode oscillations consisting of alternating small- and large-amplitude oscillations are increasingly well understood and are often caused by folded singularities, canard orbits, or singular Hopf bifurcations. We show that coupling between ident
Publikováno v:
Bossolini, E, Brøns, M & Kristiansen, K U 2020, ' A Stiction oscillator with canards : On piecewise smooth nonuniqueness and its resolution by regularization using geometric singular perturbation theory ', SIAM Review, vol. 62, no. 4, pp. 869-897 . https://doi.org/10.1137/20M1348273
In mechanics, one often describes microscopic processes such as those leading to friction be-tween relative interfaces using macroscopic variables (relative velocity, temperature, etc.) in order to avoid models of intangible complexity. As a conseque
Publikováno v:
Nielsen, A R, Heil, M, Andersen, M & Brons, M 2019, ' Bifurcation theory for vortices with application to boundary layer eruption ', Journal of Fluid Mechanics, vol. 865, pp. 831-849 . https://doi.org/10.1017/jfm.2019.97
Nielsen, A R, Heil, M, Andersen, M & Brøns, M 2019, ' Bifurcation theory for vortices with application to boundary layer eruption ', Journal of Fluid Mechanics, vol. 865, pp. 831-849 . https://doi.org/10.1017/jfm.2019.97
Nielsen, A R, Heil, M, Andersen, M & Brøns, M 2019, ' Bifurcation theory for vortices with application to boundary layer eruption ', Journal of Fluid Mechanics, vol. 865, pp. 831-849 . https://doi.org/10.1017/jfm.2019.97
We develop a bifurcation theory describing the conditions under which vortices are created or destroyed in a two-dimensional incompressible flow. We define vortices using the $Q$-criterion and analyse the vortex structure by considering the evolution
Publikováno v:
Nielsen, A R, Andersen, M, Hansen, J S & Brøns, M 2021, ' Topological bifurcations of vortex pair interactions ', Journal of Fluid Mechanics, vol. 917, 2100191 . https://doi.org/10.1017/jfm.2021.191
We investigate vortex pair interactions at low Reynolds numbers. We base our analysis on the Q-criterion, where a vortex is defined as a region where the local rotation dominates the strain, and we make use of a topological approach to describe the q
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13d5a35d94e67e5ea5bf16c477ad43c0
https://orbit.dtu.dk/en/publications/f800b697-99f0-4d17-b8eb-26868bf307be
https://orbit.dtu.dk/en/publications/f800b697-99f0-4d17-b8eb-26868bf307be
Publikováno v:
Journal of Fluid Mechanics. 896
Autor:
Morten Brøns
Publikováno v:
Brøns, M 2020, ' The organizing centre for the flow around rapidly spinning cylinders ', Journal of Fluid Mechanics, vol. 906, F1 . https://doi.org/10.1017/jfm.2020.819
The flow around a rotating circular cylinder has a parameter regime with a complex pattern of periodic solutions and multiple steady states. Sierra et al. (J. Fluid Mech., vol. 905, 2020, A2) provide a complete bifurcation analysis of this regime. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3dda27c0ca89d3b38f5b94730365b14
https://orbit.dtu.dk/en/publications/1be25922-ed16-4bac-ae9c-ac4de7e58301
https://orbit.dtu.dk/en/publications/1be25922-ed16-4bac-ae9c-ac4de7e58301
Publikováno v:
Andersen, M, Schreck, C, Hansen, J S & Brøns, M 2019, ' Vorticity topology of vortex pair interactions at low Reynolds numbers ', European Journal of Mechanics, B/Fluids, vol. 74, pp. 58-67 . https://doi.org/10.1016/j.euromechflu.2018.10.022
We investigate vortex merging at low Reynolds numbers from a topological point of view. We identify vortices as local extremal points of vorticity and follow the motion and bifurcation of these points as time progresses. We consider both two-dimensio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e12f3f22e952da3f9c16d067c29ba16e
https://orbit.dtu.dk/en/publications/8987decc-34ac-4d76-b3c2-7891a5378498
https://orbit.dtu.dk/en/publications/8987decc-34ac-4d76-b3c2-7891a5378498
Publikováno v:
Balci, A, Brøns, M, Herrada, M A & Shtern, V N 2016, ' Bifurcations of a creeping air–water flow in a conical container ', Theoretical and Computational Fluid Dynamics, vol. 30, no. 5, pp. 485-496 . https://doi.org/10.1007/s00162-016-0391-z
This numerical study describes the eddy emergence and transformations in a slow steady axisymmetric air–water flow, driven by a rotating top disk in a vertical conical container. As water height $$H_{\mathrm{w}}$$ and cone half-angle $$\beta $$ var