Characterization of fluorescence tracers for thermometry and film thickness measurements in liquid coolants relevant for thermal management of electric and …

M Koegl, M Delwig, L Zigan - Sensors, 2022 - mdpi.com
This study investigated a novel two-color LIF (laser-induced fluorescence) technique for
thermometry in coolants relevant for electric components. In principle, this diagnostic …

Experimental and numerical study on the falling film flow process on the outer wall of dome cylinder

H Sun, W Huang, C Zhao, Z Liu, Y Fang, J Jin… - International Journal of …, 2023 - Elsevier
The passive containment cooling system (PCCS) is crucial for ensuring the safety of nuclear
power plants, and the thickness and temperature of the falling film on its outer wall are …

[HTML][HTML] Investigation of five organic dyes in ethanol and butanol for two-color laser-induced fluorescence ratio thermometry

YN Mishra, A Yoganantham, M Koegl, L Zigan - Optics, 2020 - mdpi.com
In this article, we compare absorption and temperature-dependent fluorescence spectra of
five organic dyes for 2c-LIF (two-color laser-induced fluorescence) thermometry in ethanol …

Polarization-dependent LIF/Mie ratio for sizing of micrometric ethanol droplets doped with Nile red

M Koegl, H Dai, K Baderschneider, H Ulrich, L Zigan - Applied Optics, 2022 - opg.optica.org
The present study deals with droplet sizing based on laser-induced fluorescence (LIF) and
Mie scattering for varied polarization of the utilized laser (parallel or perpendicular). The …

Difunctional fluorescence nanoparticles for accurate tracing of nanopesticide fate and crop protection prepared by flash nanoprecipitation

K Chen, Y Wang, H Cui, Z Wei, X Jia… - Journal of agricultural …, 2020 - ACS Publications
Facile fabrication of difunctional nanoparticles (NPs) for pesticide delivery and imaging is
still a fascinating challenge. Here, water-dispersible difunctional NPs were developed using …

Development of NIR-Based ANN Models for On-Line Monitoring of Glycerol Concentration during Biodiesel Production in a Microreactor

M Gojun, D Valinger, A Šalić, B Zelić - Micromachines, 2022 - mdpi.com
During the production process, a whole range of analytical methods must be developed to
monitor the quality of production and the desired product (s). Most of those methods belong …

Planar droplet sizing for studying the influence of ethanol admixture on the spray structure of gasoline sprays

M Koegl, YN Mishra, K Baderschneider, C Conrad… - Experiments in …, 2020 - Springer
A novel planar droplet sizing (PDS) technique based on laser-induced fluorescence (LIF)
and Mie-scattering is utilized for the characterization of the spray structure under gasoline …

Phosphor thermometry in heat transfer fluids and liquid organic hydrogen carrier systems using (Sr, Ca) SiAlN3: Eu2+

J Bollmann, F Hickl, P Preuster, L Zigan… - Measurement …, 2022 - iopscience.iop.org
Temperature control in heat exchangers in reacting and non-reacting flows is of great
importance for process optimization. In this context, phosphor thermometry is a promising …

Analysis of the LIF/Mie ratio from individual droplets for planar droplet sizing: application to gasoline fuels and their mixtures with ethanol

M Koegl, K Baderschneider, FJ Bauer, B Hofbeck… - Applied Sciences, 2019 - mdpi.com
In this work, the possibility of using planar droplet sizing (PDS) based on laser-induced
fluorescence (LIF) and Mie scattering was investigated within the framework of measuring …

Morphology-dependent resonances in laser-induced fluorescence images of micrometric gasoline/ethanol droplets utilizing the dye nile red

M Koegl, H Dai, MP Qomi, F Bauer, B Eppinger… - Applied Optics, 2021 - opg.optica.org
The present study deals with the solvent-dependent morphology-dependent resonances
(MDR) in the laser-induced fluorescence (LIF) signal of monodisperse gasoline droplets (30 …