Abstract
Original language  English 

Title of host publication  Proceedings  16th International Symposium on Applications of Laser Techniques to Fluid Mechanics : from 9 to 12 of July ; Lisbon 2012 
Place of Publication  Lisbon 
Publisher  Instituto Superior Técnico 
Publication status  Published  12 Jul 2012 
Externally published  Yes 
Event  International Symposium on Applications of Laser Techniques to Fluid Mechanics  The Calouste Gulbenkian Foundation, Lisbon, Portugal Duration: 9 Jul 2012 → 12 Jul 2012 http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2012/index.asp (Link to Conference Website) 
Conference
Conference  International Symposium on Applications of Laser Techniques to Fluid Mechanics 

Country  Portugal 
City  Lisbon 
Period  9/07/12 → 12/07/12 
Internet address 

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Experimental Assessment of ‘subgrid’ scale Probability Density Function Models for Large Eddy Simulation. / Stetsyuk, Viacheslav; Hardalupas, Y.; Taylor, Alex; Soulopoulos, Nikolaos.
Proceedings  16th International Symposium on Applications of Laser Techniques to Fluid Mechanics : from 9 to 12 of July ; Lisbon 2012. Lisbon : Instituto Superior Técnico, 2012.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY  GEN
T1  Experimental Assessment of ‘subgrid’ scale Probability Density Function Models for Large Eddy Simulation
AU  Stetsyuk, Viacheslav
AU  Hardalupas, Y.
AU  Taylor, Alex
AU  Soulopoulos, Nikolaos
PY  2012/7/12
Y1  2012/7/12
N2  Filtered density functions (FDFs) of mixture fraction are quantified by analyzing experimental data obtained from twodimensional planar laserinduced fluorescence scalar measurements in the isothermal swirling flow of a combustor operating at a Reynolds number of 28,662 for three different swirl numbers (0.3, 0.58 and 1.07). Twodimensional filtering using a box filter was performed on the measured scalar to obtain the filtered variables used for presumed β FDF and tophat FDF for Large Eddy Simulations (LES). A dependant variable from the measured scalar, which was a precomputed temperature, was integrated over the experimentally obtained FDF as well as over the presumed beta or tophat FDFs and a relative error in temperature prediction was calculated. The experimentally measured FDFs depended on swirl numbers and axial and radial positions in the flow. The FDFs were unimodal in the regions of low variance and bimodal in the regions of high variance. The influence of the filter spatial dimension on the measured FDF was evaluated and consequences for Subgrid modeling for LES discussed.
AB  Filtered density functions (FDFs) of mixture fraction are quantified by analyzing experimental data obtained from twodimensional planar laserinduced fluorescence scalar measurements in the isothermal swirling flow of a combustor operating at a Reynolds number of 28,662 for three different swirl numbers (0.3, 0.58 and 1.07). Twodimensional filtering using a box filter was performed on the measured scalar to obtain the filtered variables used for presumed β FDF and tophat FDF for Large Eddy Simulations (LES). A dependant variable from the measured scalar, which was a precomputed temperature, was integrated over the experimentally obtained FDF as well as over the presumed beta or tophat FDFs and a relative error in temperature prediction was calculated. The experimentally measured FDFs depended on swirl numbers and axial and radial positions in the flow. The FDFs were unimodal in the regions of low variance and bimodal in the regions of high variance. The influence of the filter spatial dimension on the measured FDF was evaluated and consequences for Subgrid modeling for LES discussed.
KW  PLIF
KW  FDF
KW  LES
KW  subgrid
UR  http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2012/index.asp
M3  Conference contribution
BT  Proceedings  16th International Symposium on Applications of Laser Techniques to Fluid Mechanics : from 9 to 12 of July ; Lisbon 2012
PB  Instituto Superior Técnico
CY  Lisbon
ER 