Evaluation of Travelling Vortex Speed by Means of Dynamic Mode Decomposition and Residual Vorticity

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F16%3A00309676" target="_blank" >RIV/68407700:21220/16:00309676 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/epjconf/201611402045" target="_blank" >http://dx.doi.org/10.1051/epjconf/201611402045</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjconf/201611402045" target="_blank" >10.1051/epjconf/201611402045</a>

Result language
angličtina
Original language name
Evaluation of Travelling Vortex Speed by Means of Dynamic Mode Decomposition and Residual Vorticity
Original language description
The article deals with the analysis of synthetic jet flow field by means of dynamic mode decomposition (DMD) method. The speed of travelling vortex ring which is connected with synthetic jet creation is evaluated using the wavelength identified from DMD modes. Vortices are identified in the DMD modes by using residual vorticity which allows to identify regions in the flow field where fluid particles perform rotational motion. The analysis is based on the data from the numerical simulation of synthetic jet into quiescent air by using ANSYS Fluent code. The regime of synthetic jet with Re = 329 and Stk = 19.7 is chosen. An increase in the vortex speed close to the orifice and then the decrease is observed with maximum reaching almost one and half of averaged blowing orifice centerline velocity.
Czech name
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Czech description
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Project
<a href="/en/project/GA14-08888S" target="_blank" >GA14-08888S: Control of flow fields by means of fluid oscillation</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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