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Breakup of small ag...
Breakup of small aggregates in bounded and unbounded turbulent flows
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- Bäbler, Matthäus, 1977- (författare)
- KTH,Energiprocesser
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Biferale, Luca (författare)
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- Brandt, Luca (författare)
- KTH,Linné Flow Center, FLOW,SeRC - Swedish e-Science Research Centre,Strömningsmekanik och Teknisk Akustik
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- Feudel, Ulrike (författare)
- Theoretical Physics, Complex Systems, ICBM, University of Oldenburg, Oldenburg, Germany
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- Guseva, Ksenia (författare)
- Theoretical Physics, Complex Systems, ICBM, University of Oldenburg, Oldenburg, Germany
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Lanotte, A. S. (författare)
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Marchioli, C. (författare)
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- Pecile, Eros (författare)
- University of Udine, Udine, Italy
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- Picano, Francesco (författare)
- University of Udine, Udine, 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)
- University of Udine, Udine, Italy
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- Toschi, Federico (författare)
- Dept. Applied Physics, Eindhoven University of Technology, Eindhoven, Netherlands
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(creator_code:org_t)
- Zakon Group LLC, 2020
- 2020
- Engelska.
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Ingår i: ETC 2013 - 14th European Turbulence Conference. - : Zakon Group LLC.
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- Breakup of small tracer-like aggregates is studied by means of numerical simulations in four different flows, namely homogeneous isotropic turbulence, smooth stochastic flow, turbulent channel flow, and developing boundary layer flow. Aggregate breakup occurs when the local hydrodynamic stress σ ∼ ε1/2, where ε is the local energy dissipation, overcomes a given threshold value σcr [or equivalently εcr ∼ σcr2 ] characteristic for a given type of aggregates. Following the aggregate trajectory upon release and detecting the first occurrence of local energy dissipation exceeding the predefined threshold allows for estimating the breakup rate as a function of εcr. Results show that the breakup rate decreases with increasing threshold. For small values of the threshold, this decrease assumes consistent scaling among the different flows which is explained by universal small scale flow properties.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Nyckelord
- Aggregates
- Boundary layer flow
- Boundary layers
- Channel flow
- Energy dissipation
- Stochastic systems
- Turbulence
- Break-up rates
- Homogeneous isotropic turbulence
- Local hydrodynamics
- Small-scale flows
- Stochastic flows
- Threshold-value
- Turbulent channel flows
- Atmospheric thermodynamics
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- 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, A. S.
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visa fler...
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Marchioli, C.
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Pecile, Eros
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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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