Mixing and Dispersion in Small-Scale Flow Systems

simulation and experimental studies for prediction mineral scale formation in oil field during mixing of injection and formation water

abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...

experimental investigation of power consumption, mass transfer coefficient and flow regime in gas-liquid dispersion systems

Small-scale anisotropy in turbulent shearless mixing.

The generation of small-scale anisotropy in turbulent shearless mixing is numerically investigated. Data from direct numerical simulations at Taylor Reynolds' numbers between 45 and 150 show not only that there is a significant departure of the longitudinal velocity derivative moments from the values found in homogeneous and isotropic turbulence but that the variation of skewness has an opposit...

Mixing-Scale Dependent Dispersion For Transport in Heterogeneous Flows

Dispersion quantifies the impact of subscale velocity fluctuations on the effective movement of particles and the evolution of scalar distributions in heterogeneous flows. Which fluctuation scales are represented by and what is the meaning of dispersion, depends on the definition of the subscale, or the corresponding coarse graining scale. We study here the dispersion effect due to velocity flu...

Direct observation of dispersion and mixing processes in microfluidic systems.

The diffusion phenomena, dispersion and mixing processes of the sample solute (Basic Blue 3 dye and KMnO4 aqueous solutions) were directly observed in laminar flow in glass microchannels. Quasi steady-state UV-visible absorption spectrometry was carried out using CCD camera images of the colored sample dispersion and mixing processes, and the absorbance change (DeltaAbs) was discussed based on ...