Energy and Entropy in Turbulence Decompositions

0500692 - ÚT 2020 RIV CH eng J - Článek v odborném periodiku
Uruba, Václav
Energy and Entropy in Turbulence Decompositions.
Entropy. Roč. 21, č. 2 (2019), č. článku 124. E-ISSN 1099-4300
Grant CEP: GA ČR(CZ) GA17-01088S
Institucionální podpora: RVO:61388998
Klíčová slova: turbulence * coherent structures * decomposition * energy * entropy
Obor OECD: Applied mechanics
Impakt faktor: 2.494, rok: 2019
Způsob publikování: Omezený přístup
https://res.mdpi.com/entropy/entropy-21-00124/article_deploy/entropy-21-00124.pdf?filename=&attachment=1

The role of energy and entropy in the decomposition of turbulent velocity flow-fields is shown in this paper. Decomposition methods based on the energy concept are taken into account—proper orthogonal decomposition (POD) and its extension bi-orthogonal decomposition (BOD). The methods are well known, however, various versions are used and the interpretation of results is not straightforward. To make this clearer, the specific definition of modes is suggested and specified, moreover, energy- and entropy-motivated views on the decomposed modes are presented. This concept could offer new possibilities in the physical interpretation of modes and in reduced-order modeling (ROM) strategy efficiency evaluation.
Trvalý link: http://hdl.handle.net/11104/0298238