TY - JOUR
T1 - Atomization Modeling Using Surface Density And Stochastic Fields
AU - Ahmed, Aqeel
AU - Tretola, Giovanni
AU - Navarro-Martinez, Salvador
AU - Vogiatzaki, Konstantina
AU - Duret, B.
AU - Reveillon, Julien
AU - Demoulin, Francois-Xavier
PY - 2020
Y1 - 2020
N2 - Correct prediction of the spray in automotive and aerospace engines remains a challenging task. In this work we present a numerical framework to characterize the spray, using both the large scale quantities, like mean liquid volume fractions, as well as small scale structures or liquid droplets. In the limit of high Reynolds and Weber number, the drop size is expected to be much smaller than can be resolved using first principles on a given mesh, thus a subgrid formulation is used to characterize the drop size. Using liquid gas interface surface density we have compared a standard formulation as well as a probability density function-based formulation. Using large eddy simulation we compared against the experimental database hosted by the engine combustion network for a single hole injector. Sauter mean diameter is predicted well using our formulation; at the same time use of the probability density function brings additional information regarding drop size distribution.
AB - Correct prediction of the spray in automotive and aerospace engines remains a challenging task. In this work we present a numerical framework to characterize the spray, using both the large scale quantities, like mean liquid volume fractions, as well as small scale structures or liquid droplets. In the limit of high Reynolds and Weber number, the drop size is expected to be much smaller than can be resolved using first principles on a given mesh, thus a subgrid formulation is used to characterize the drop size. Using liquid gas interface surface density we have compared a standard formulation as well as a probability density function-based formulation. Using large eddy simulation we compared against the experimental database hosted by the engine combustion network for a single hole injector. Sauter mean diameter is predicted well using our formulation; at the same time use of the probability density function brings additional information regarding drop size distribution.
KW - Atomization
KW - Engine combustion network (ecn) spray a
KW - Large eddy simulation (les)
KW - Probability density functions (pdf)
KW - Stochastic fields
UR - http://www.scopus.com/inward/record.url?scp=85092638822&partnerID=8YFLogxK
U2 - 10.1615/atomizspr.2020032620
DO - 10.1615/atomizspr.2020032620
M3 - Article
SN - 1045-5110
VL - 30
SP - 239
EP - 266
JO - Atomization and Sprays
JF - Atomization and Sprays
IS - 4
ER -