Mixing and chemical reactions in multiphase systems
Jueves 9 de Novembre a las 12:15 h
Departamento de Ingeniería del Terreno, Aula CIHS, Planta Baja
Porous and fractured media are often characterized by the coexistence of immiscible (e.g., water and air in soils) or partially miscible (e.g., water and oil with CO2 in reservoirs) phases. The complex spatial distribution of the phases can considerably complicate the flow dynamics with the development of regions of very low velocity, including regions where velocity is zero, and of preferential channels of high velocity. This highly heterogeneous velocity field makes transport, including mixing and chemical reactions, more complex. Mixing processes play a key role in controlling fluid-fluid chemical reactions. However, conventional continuum-scale theories and models oversimplify and/or ignore important micro-scale processes. I present recently proposed experimental developments (milli- and micro-fluidics) and theoretical approaches for a better mechanistic understanding of transport, mixing, and chemical reactions, and their coupling with multiphase flows.