A CFD hybrid approach to simulate liquid-phase chemical reactors

The influence of turbulent transport in reactive processes: A combined numerical and experimental investigation in a Taylor-Couette reactor

“…In systems where Da >>1 (that is, reaction rates are limited by fluid transport), the presence of turbulence will play a significant role in the local transport of chemical species, and this could affect reactant conversion and product selectivity [1]. Since turbulent flows are fundamental to many industrially relevant chemical processes, the analysis of the turbulence-kinetics interactions (TKI) [2] is necessary to decouple intrinsic chemical reaction rates from the effects of fluid transport. This can be achieved through the numerical modeling of flow and chemistry on a microscale level.…”

“…This model was extended by using a spectral relaxation method to better account for the spectrum of velocity fluctuations in turbulence [33]. Rizzotto et al [2] showed the use of such a model in a RANS simulation to account for turbulent dissipation through a constant turbulent Schmidt number (Sc t ). This method relies on correlations between the limiting reaction rate and isotropic turbulent statistics -such as the turbulent kinetic energy (TKE) and the turbulent dissipation rate (TDR) -and thus does not capture more complex anisotropic turbulent transport phenomena.…”