On stochastic inlet boundary condition for unsteady simulations
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F13%3APU106797" target="_blank" >RIV/00216305:26210/13:PU106797 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/epjconf/20146702082" target="_blank" >http://dx.doi.org/10.1051/epjconf/20146702082</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjconf/20146702082" target="_blank" >10.1051/epjconf/20146702082</a>
Alternative languages
Result language
angličtina
Original language name
On stochastic inlet boundary condition for unsteady simulations
Original language description
The paper deals with the stochastic generation of synthesized turbulence, which may be used for a generating of an inlet boundary condition for unsteady simulations, e.g. Direct Numerical Simulation (DNS) or Large Eddy Simulation (LES). Assumptions for the generated turbulence are isotropy and homogeneity. The described method produces a stochastic turbulent velocity field using the synthesis of a finite sum of random Fourier modes. The calculation of individual Fourier modes is based on known energy spectrum of turbulent flow, and some turbulent quantities, e.g. turbulent kinetic energy and turbulent dissipation rate. A division of wave number range of the energy spectrum determines directly the number of Fourier modes, and has a direct impact on accuracy and speed of this calculation. Therefore, this work will examine the influence of the number of Fourier modes on a conservation of the first and second statistical moments of turbulent velocity components, which are prespecified. It is important to ensure a sufficient size of a computational domain, and a sufficient number of cells for meaningful comparative results. Dimensionless parameters characterizing the resolution and size of the computational domain according to a turbulent length scale will be introduced for this purpose. Subsequently, the sufficient values of this parameters will be shown for individual numbers of Fourier modes.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
JR - Other machinery industry
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA13-27505S" target="_blank" >GA13-27505S: Meshfree technique with Large Eddy Simulation for fluid dynamics and computational aeroacoustics</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
EPJ Web of Conferences
ISBN
978-80-260-5375-0
ISSN
2100-014X
e-ISSN
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Number of pages
4
Pages from-to
495-498
Publisher name
Technical University of Liberec
Place of publication
Kutná Hora
Event location
Kutná Hora
Event date
Nov 19, 2013
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000343672100085