The effect of the inlet flow conditions on the degree of mixing in a T-shaped micro-mixer is investigated numerically. Specifically, it is observed that if the flows at the micro-mixer confluence are not fully developed, engulfment occurs at larger Reynolds number, with a different flow pattern and with much lower mixing efficiencies, compared with the case where the inlet flows are fully developed. Thus, for a given micro-mixer geometry, two different engulfment flows may be found as the Reynolds number is increased, corresponding to successive symmetry breaking processes. This work highlights also the importance of both a fine discretization of the micro-mixer as well as of suited convergence criteria for the setting of the numerical simulations.
|Autori:||Galletti, Chiara; Roudgar, M; Brunazzi, Elisabetta; Mauri, Roberto|
|Titolo:||Effect of Inlet Conditions on the Engulfment Pattern in a T-Shaped Micro-Mixer|
|Anno del prodotto:||2012|
|Digital Object Identifier (DOI):||10.1016/j.cej.2012.01.046|
|Appare nelle tipologie:||1.1 Articolo in rivista|