Effect of nanoparticles concentration on the characteristics of nanofluid sprays for cooling applications
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F19%3APU128153" target="_blank" >RIV/00216305:26210/19:PU128153 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007/s10973-018-7444-z" target="_blank" >https://link.springer.com/article/10.1007/s10973-018-7444-z</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10973-018-7444-z" target="_blank" >10.1007/s10973-018-7444-z</a>
Alternative languages
Result language
angličtina
Original language name
Effect of nanoparticles concentration on the characteristics of nanofluid sprays for cooling applications
Original language description
This study addresses the effect of nanofluid synthesis on the rheological properties of the resulting fluid and their consequent effect on the characteristics (size and velocity distribution of droplets, spray cone angle, etc.) of the sprayed nanofluids. The results are discussed in the light of how the spray characteristics affect the use of the resulting nanofluid spray for cooling purposes. Nanoparticles of alumina (Al2O3) and zinc oxide (ZnO) are mixed in water-based solutions, for concentrations varying between 0.5% and 2 mass% for alumina and between 0.01% and 0.1 mass% for the zinc oxide particles. FeCl2 4H2O (0.1 mass%) was also used to infer on the effect of the nature (material) of the particles in the physicochemical properties of the resulting solutions. Among the various surfactants tested, citric acid (0.15%) was chosen for the final working mixtures, as it assured a stable behaviour of the solutions prepared during the entire study. The nanoparticles were characterized in detail, and the physicochemical properties of the fluid were measured before and after atomization, to evaluate any possible particle loss in the liquid feeding system or retention in the atomizer. The nanofluids were sprayed using a pressure-swirl atomizer at 0.5 MPa injection pressure. Droplet size and velocity in the spray were probed using phase Doppler anemometry. For the range of experimental conditions covered here, the results show that liquid viscosity is an important parameter in predetermining the spray characteristics of nanofluids, as it affects the primary liquid breakup. Despite this, only a mild increase is observed in the nanofluids viscosity, mainly for higher concentrations of alumina, which was not sufficient to significantly affect the spray characteristics, except for a small decrease in the spray cone angle and the size of the atomized droplets. Hence, for cooling purposes, the atomization mechanisms are not compromised by the addition of the nanoparticles and
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
<a href="/en/project/GA18-15839S" target="_blank" >GA18-15839S: Characterization of internal flow and spray for new modifications of spill-return pressure-swirl atomizers</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Thermal Analysis and Calorimetry
ISSN
1388-6150
e-ISSN
1588-2926
Volume of the periodical
135
Issue of the periodical within the volume
6
Country of publishing house
HU - HUNGARY
Number of pages
12
Pages from-to
3375-3386
UT code for WoS article
000462553400046
EID of the result in the Scopus database
2-s2.0-85048366349