A comparative experimental study on thermal conductivity of distilled
water-based mono nanofluids with zirconium oxide and silicon carbide for
thermal industrial applications: Proposing a new correlation
الباحث الأول:
Ahmed M. Ajeena
الباحثين الآخرين:
Istvan Farkas , Piroska Víg
المجلة:
Elsevier: International Journal of Thermofluids
تاريخ النشر:
14 يوليو، 2023
مختصر البحث:
The main aim of this experiment was to determine the thermal conductivity of two nanofluids, ZrO
2
/DW and
SiC/DW, under different temperatures and concentrations as compared to the base fluid. In this work, zirconium
oxide and silicon carbi…
The main aim of this experiment was to determine the thermal conductivity of two nanofluids, ZrO
2
/DW and
SiC/DW, under different temperatures and concentrations as compared to the base fluid. In this work, zirconium
oxide and silicon carbide nanoparticles were obtained, and the nanofluids were prepared using a two-stage
method by dispersing the nanoparticles in distilled water (DW) by the ultrasonic processor and a magnetic
mixture. Field emission scanning electron microscopy (FESEM), Energy-dispersive x-ray spectrometer (EDX),
Transmission Electron Microscope (TEM), and X-ray diffraction (XRD) techniques were used to microstructural
and characterize the nanoparticles. Stability of nanofluids were examined by zeta potential test. After that,
thermal conductivity was measured using the thermal hot wire method using a KD2-Pro thermal analyzer at
temperatures ranging from 20 to 60
◦
C. Solid volume fractions (φ) of 0.025%, 0.05%, 0.075%, and 0.1% were
used. The results showed that the thermal conductivity of the nanofluid was enhanced with increased volume
fractions and temperature. The highest recorded thermal conductivity was at the highest temperature 60
◦
solid volume fraction 0.1%. The thermal conductivity enhancement for ZrO
2
C and
/DW at the volume fraction of 0.1%
was 20.455%, and that of SiC/DW was 30.303%. The enhancement was compared to that of the base fluid,
distilled water. Finally, based on experimental data, A new mathematical correlations were obtained by curve-
f
itting. The correlations were used to estimate the thermal conductivity of ZrO
2
/DW and SiC/DW nanofluids at
different solid volume fractions and temperatures. The results obtained were compared to a correlation to
determine their accuracy. The deviations from the presented correlations were 1.49% and 1.2% for ZrO
/DW and
SiC/DW, respectively. The comparison between experimental results and correlation outputs showed a good
agreement which signifies that the results were accurate.
