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Numerical simulatio...
Numerical simulations of aggregate breakup in bounded and unbounded turbulent flows
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- Bäbler, Matthäus (författare)
- KTH,Energiprocesser
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Biferale, Luca (författare)
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- Brandt, Luca (författare)
- KTH,Mekanik,Linné Flow Center, FLOW,SeRC - Swedish e-Science Research Centre
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Feudel, Ulrike (författare)
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Guseva, Ksenia (författare)
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Lanotte, Alessandra S. (författare)
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Marchioli, Cristian (författare)
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- Picano, Francesco (författare)
- KTH,Mekanik,Linné Flow Center, FLOW,SeRC - Swedish e-Science Research Centre,University of Padua, Italy
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- Sardina, Gaetano (författare)
- KTH,Linné Flow Center, FLOW,SeRC - Swedish e-Science Research Centre
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Soldati, Alfredo (författare)
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Toschi, Federico (författare)
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(creator_code:org_t)
- 2015-02-02
- 2015
- Engelska.
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Ingår i: Journal of Fluid Mechanics. - : Cambridge University Press (CUP). - 0022-1120 .- 1469-7645. ; 766
- Relaterad länk:
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Breakup of small aggregates in fully developed turbulence is studied by means of direct numerical simulations in a series of typical bounded and unbounded flow configurations, such as a turbulent channel flow, a developing boundary layer and homogeneous isotropic turbulence. The simplest criterion for breakup is adopted, whereby aggregate breakup occurs when the local hydrodynamic stress sigma similar to epsilon(1/2), with epsilon being the energy dissipation at the position of the aggregate, overcomes a given threshold sigma(cr), which is characteristic for a given type of aggregate. Results show that the breakup rate decreases with increasing threshold. For small thresholds, it develops a scaling behaviour among the different flows. For high thresholds, the breakup rates show strong differences between the different flow configurations, highlighting the importance of non-universal mean-flow properties. To further assess the effects of flow inhomogeneity and turbulent fluctuations, the results are compared with those obtained in a smooth stochastic flow. Furthermore, we discuss the limitations and applicability of a set of independent proxies.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- breakup/coalescence
- multiphase and particle-laden flows
- turbulent flows
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Bäbler, Matthäus
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Biferale, Luca
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Brandt, Luca
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Feudel, Ulrike
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Guseva, Ksenia
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Lanotte, Alessan ...
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visa fler...
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Marchioli, Crist ...
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Picano, Francesc ...
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Sardina, Gaetano
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Soldati, Alfredo
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Toschi, Federico
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visa färre...
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