Numerical simulation and self-similarity of the mean mass transfer in turbulent round jets

Further results on the mean mass transfer and fluid flow in a turbulent round jet

“…This paper presents new further results, completing those reported in [26,32], of first and second order turbulence moment and passive scalar spreading, obtained with LES approach of a turbulent round jet at four Reynolds (Re) numbers (Re=2492, Re=4491, Re=9994, Re=19,988) and laminar Schmidt (Sc) number equal to Sc=10. .…”

“…1 at the four Reynolds numbers investigated, as ratio of mean to maximum value on the centerline of the exit slot. Mean axial velocity contours are similar to mean passive scalar fields, shown in [26], as far as URF is concerned. On the other hand, the mean passive scalar contours of [26] are more homogenous in PCR and FDR because turbulent Schmidt number is not constant and mean passive scalar is more diffuse, compared to mean axial velocity, because turbulent Schmidt number is smaller than 1.…”

“…Mean axial velocity contours are similar to mean passive scalar fields, shown in [26], as far as URF is concerned. On the other hand, the mean passive scalar contours of [26] are more homogenous in PCR and FDR because turbulent Schmidt number is not constant and mean passive scalar is more diffuse, compared to mean axial velocity, because turbulent Schmidt number is smaller than 1. The self-similar mean axial velocity profiles, reported in [32], are in good agreement with [44] in URF, [45] in PCR and [11,[46][47] in FDR.…”

“…Momentum and passive scalar second order moments profiles are in [22][23], while Reynolds stresses, temperature variance and turbulent heat flux in [24][25]. Turbulent passive scalar flux is in [26],…”

Heat Transfer Analysis for Combustion under Low-Gradient Conditions in a Small-Scale Industrial Energy Systems

“…On the other hand, heat of reaction is compressed as it shrank significantly and moved upstream in the case of critical k IRD = 0.9 W/(m • K). Since appropriate jet modeling may play an important role in reactive flows, same as it plays in the heat and mass transfer of non-reactive ones, it should be investigated more closely in future works, especially if some kind of a deflector is involved [38][39][40][41][42][43]. The majority of chemical reactions occur in transitional or fully developed regions, as in the potential core region the self-ignition temperature is not reached in this work due to the absence of substrates pre-heating.…”