TY - JOUR

T1 - Measurements of micro- and macromixing in liquid mixtures of reacting components using two-colour laser induced fluorescence

AU - Faes, M.

AU - Glasmacher, B.

PY - 2008/10

Y1 - 2008/10

N2 - The progress in mixing of two liquids with two way solubility is visualised by means of two-colour laser induced fluorescence (LIF). The mixing process is divided into two steps. In the first step, the so-called macromixing, the fluid elements of a multicomponent system are dispersed and deformed due to viscous friction. During the second step, the micromixing, local concentration differences are reduced due to diffusion transport on molecular scale. Both transport phenomena can be simultaneously measured by injecting a mixture of an inert and a reacting dye. The performance of mixing is recalculated from the local measurements of the concentration fields and visualised by the local degree of deviation. The mass transport on the microscopic scale varies because of the locally diverse dissipation of energy. Particle image velocimetry (PIV) measurements are used for the calculation of the source terms of local energy dissipation. The experimental results correlate the progress of mixing to the local energy dissipation.

AB - The progress in mixing of two liquids with two way solubility is visualised by means of two-colour laser induced fluorescence (LIF). The mixing process is divided into two steps. In the first step, the so-called macromixing, the fluid elements of a multicomponent system are dispersed and deformed due to viscous friction. During the second step, the micromixing, local concentration differences are reduced due to diffusion transport on molecular scale. Both transport phenomena can be simultaneously measured by injecting a mixture of an inert and a reacting dye. The performance of mixing is recalculated from the local measurements of the concentration fields and visualised by the local degree of deviation. The mass transport on the microscopic scale varies because of the locally diverse dissipation of energy. Particle image velocimetry (PIV) measurements are used for the calculation of the source terms of local energy dissipation. The experimental results correlate the progress of mixing to the local energy dissipation.

KW - Homogenisation

KW - Laminar flow

KW - Laser induced fluorescence

KW - Micro- and macromixing

KW - Particle image velocimetry

KW - Transport processes

KW - Visualisation

UR - http://www.scopus.com/inward/record.url?scp=52149117866&partnerID=8YFLogxK

U2 - 10.1016/j.ces.2007.10.036

DO - 10.1016/j.ces.2007.10.036

M3 - Article

AN - SCOPUS:52149117866

VL - 63

SP - 4649

EP - 4655

JO - Chemical engineering science

JF - Chemical engineering science

SN - 0009-2509

IS - 19

ER -