TY - GEN
T1 - Investigation of eddy diffusivity in a reactive plane jet by using direct numerical simulation
AU - Watanabe, Tomoaki
AU - Sakai, Yasuhiko
AU - Nagata, Kouji
AU - Terashima, Osamu
AU - Ito, Yasumasa
AU - Suzuki, Hiroki
AU - Hayase, Toshiyuki
PY - 2012
Y1 - 2012
N2 - Eddy diffusivity in a planar turbulent jet with a second-order chemical reaction (A+B→R) is investigated by using direct numerical simulation. Reactant A and B are premixed into the jet flow and the main flow, respectively. The eddy diffusivity of species A on the jet centerline is calculated from the mean concentration of species A and the streamwise turbulent mass flux of the species A. The results show that the chemical reaction makes the eddy diffusivity of species A small, and the effects of the chemical reaction on the eddy diffusivity depend on the Damköhler number. From these results, we can conclude that the gradient diffusion model should be used with considerations of the effects of chemical reactions on eddy diffusivity.
AB - Eddy diffusivity in a planar turbulent jet with a second-order chemical reaction (A+B→R) is investigated by using direct numerical simulation. Reactant A and B are premixed into the jet flow and the main flow, respectively. The eddy diffusivity of species A on the jet centerline is calculated from the mean concentration of species A and the streamwise turbulent mass flux of the species A. The results show that the chemical reaction makes the eddy diffusivity of species A small, and the effects of the chemical reaction on the eddy diffusivity depend on the Damköhler number. From these results, we can conclude that the gradient diffusion model should be used with considerations of the effects of chemical reactions on eddy diffusivity.
KW - Chemical Reaction
KW - Direct Numerical Simulation
KW - Eddy Diffusivity
KW - Turbulent Flow
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U2 - 10.1007/978-3-642-34384-1_18
DO - 10.1007/978-3-642-34384-1_18
M3 - Conference contribution
AN - SCOPUS:84868322100
SN - 9783642343834
T3 - Communications in Computer and Information Science
SP - 144
EP - 150
BT - AsiaSim 2012 - Asia Simulation Conference 2012, Proceedings
T2 - Asia Simulation Conference, AsiaSim 2012
Y2 - 27 October 2012 through 30 October 2012
ER -