WFRF:(Lipatnikov Andrei 1961)
Sökning: WFRF:(Lipatnikov Andrei 1961) > A DNS assessment of...
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04370naa a2200469 4500 | |
| 001 | oai:research.chalmers.se:3b920ec2-de8c-4b2a-96b3-22201abbe9b7 | |
| 003 | SwePub | |
| 008 | 190520s2019 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://research.chalmers.se/publication/5103142 URI |
| 024 | 7 | a https://research.chalmers.se/publication/5106752 URI |
| 024 | 7 | a https://research.chalmers.se/publication/5127902 URI |
| 024 | 7 | a https://doi.org/10.1080/13647830.2018.15203042 DOI |
| 040 | a (SwePub)cth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Lipatnikov, Andrei,d 1961u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)lipatn |
| 245 | 1 0 | a A DNS assessment of linear relations between filtered reaction rate, flame surface density, and scalar dissipation rate in a weakly turbulent premixed flame |
| 264 | c 2018-09-10 | |
| 264 | 1 | b Informa UK Limited,c 2019 |
| 338 | a electronic2 rdacarrier | |
| 520 | a Linear relations between (i) filtered reaction rate and filtered flame surface density (FSD) and (ii) filtered reaction rate and filtered scalar dissipation rate (SDR), which are widely used in Large Eddy Simulation (LES) research into premixed turbulent combustion, are examined by processing DNS data obtained from a statistically 1D planar flame under weakly turbulent conditions that are most favourable for the two approaches (flamelet combustion regime, single-step chemistry, equidiffusive mixture, adiabatic burner, and low Mach number). The analysis well supports the former approach provided that the filtered reaction rate is combined with filtered molecular transport term. In such a case, both the RANS and LES FSD approaches are based on local relations valid within weakly perturbed flamelets. Accordingly, simply recasting RANS expressions to a filtered form works well. On the contrary, while the FSD and SDR approaches appear to be basically similar at first glance, the analysis does not support the latter one, but shows that a ratio of the filtered reaction rate to the filtered SDR is strongly scattered within the studied flame brush, with its conditionally mean value varying significantly with Favre-filtered combustion progress variable. As argued in the paper, these limitations of the LES SDR approach stem from the fact that it is based on a relation valid after integration over weakly perturbed flamelets, but this relation does not hold locally within such flamelets. Consequently, when a sufficiently small filter is applied to instantaneous fields, the filter may contain only a part of the local flamelet, whereas the linear relation holds solely for the entire flamelet and may not hold within the filtered flamelet volume. Thus, the present study implies that straightforwardly recasting well established RANS equations to a filtered form is a flawed approach if the equations are based on integral features of local burning. | |
| 650 | 7 | a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Energiteknik0 (SwePub)203042 hsv//swe |
| 650 | 7 | a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Energy Engineering0 (SwePub)203042 hsv//eng |
| 650 | 7 | a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Strömningsmekanik och akustik0 (SwePub)203062 hsv//swe |
| 650 | 7 | a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Fluid Mechanics and Acoustics0 (SwePub)203062 hsv//eng |
| 653 | a flame surface density | |
| 653 | a turbulent combustion | |
| 653 | a LES | |
| 653 | a DNS | |
| 653 | a scalar dissipation rate | |
| 700 | 1 | a Nishiki, S.u Kagoshima University4 aut |
| 700 | 1 | a Hasegawa, Tatsuya,d 1951u Nagoya University4 aut |
| 710 | 2 | a Chalmers tekniska högskolab Kagoshima University4 org |
| 773 | 0 | t Combustion Theory and Modellingd : Informa UK Limitedg 23:2, s. 245-260q 23:2<245-260x 1364-7830x 1741-3559 |
| 856 | 4 | u https://research.chalmers.se/publication/512790/file/512790_Fulltext.pdfx primaryx freey FULLTEXT |
| 856 | 4 | u https://www.tandfonline.com/doi/pdf/10.1080/13647830.2018.1520304?needAccess=true |
| 856 | 4 8 | u https://research.chalmers.se/publication/510314 |
| 856 | 4 8 | u https://research.chalmers.se/publication/510675 |
| 856 | 4 8 | u https://research.chalmers.se/publication/512790 |
| 856 | 4 8 | u https://doi.org/10.1080/13647830.2018.1520304 |
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