Round-robin test on thermal conductivity measurement of ZnO nanofluids and comparison of experimental results with theoretical bounds

Lee, Wook-Hyun; Rhee, Chang Kyu; Koo, Junemo; Lee, Jae-Keun; Jang, Seok Pil; Choi, Seok Jin; Lee, Ki-Woong; Bae, Hwa-Young; Lee, Jun Young; Kim, Chang-Kyu; Hong, Sung Wook; Kwon, Yong Hoon; Kim, Doo-Hyun; Kim, Sung Hyun; Hwang, Kyo Sik; Kim, Hyun Jin; Ha, Hyo Jun; Lee, Seung–Hyun; Choi, Chul Jin; Lee, Ji‐Hwan

doi:10.1186/1556-276x-6-258

Cited by 19 publications

(5 citation statements)

References 49 publications

(47 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Enhanced thermal conductivity results of ZnO/ethylene glycol nanofluid (27% for 5 vol%) are reported by Wei Yu 12 . ZnO nanofluids have been studied extensively for their thermal and heat transfer properties through round robin test and the results confirm the discrepancy between experimental and theoretical values 13 . ZnO nanofluids have shown hysteresis during heating and cooling cycles 14 and extensive studies have been performed an their physiochemical properties 15,16 .…”

mentioning

confidence: 54%

Solar Absorption Capacity of Zinc Oxide Nanofluids

Subramaniyan¹,

Krishnan

Sivailango³

et al. 2016

Current Science

View full text Add to dashboard Cite

mentioning

confidence: 54%

Solar Absorption Capacity of Zinc Oxide Nanofluids

Subramaniyan¹,

Krishnan

Sivailango³

et al. 2016

Current Science

View full text Add to dashboard Cite

“…In some cases, this loss of coordination favored the appearance of superficial planes. This type of plane is observed in nanoparticles and originated by minimizing energy [41].…”

Section: Resultsmentioning

confidence: 97%

Structural Disorder of CuO, ZnO, and CuO/ZnO Nanowires and Their Effect on Thermal Conductivity

et al. 2023

View full text Add to dashboard Cite

In this work, the structural defects and the thermal conductivity of CuO, ZnO, and CuO/ZnO nanowires have been studied, using molecular dynamics simulation with COMB3 potential. The initial parameters and atoms positions were taken from reports of bulk materials with tenorite and wurtzite structures, respectively. Nanowires were grown along the c-axis, as observed experimentally. The results confirm the defects apparition in the systems after simulation with a formation of grains to reduce the energy of the nanowires. In the CuO nanowires case, the lack of periodicity in the basal plane causes a contraction effect over the network parameter b of the monoclinic structure with a Cu-O distance reduction. [A constriction effect on inclined planes, as a product of surface charges, deforms the nanowire, generating undulations. In ZnO nanowires, a decrease in the Zn-Zn distance produced a contraction in the nanowire length. A constriction effect was evident on the surface charges. It presented a bond reduction effect, which was larger at the ends of the nanowire. In CuO/ZnO nanowires, the structural defects come from the distortions of the crystalline lattice of the ZnO rather than CuO. The thermal conductivity of the nanowires was calculated at temperatures between 200 K and 600 K using the Green–Kubo equation. Results showed similar values to those reported experimentally, and the characteristic maximum with similar trends to those observed in semiconductors. Our results suggest that structural defects appear in nanowires grown on the free substrate, and are not related to the lattice mismatch.

show abstract

“…They observed that k nf enhancement increases monotonously with nanoparticle loading, whereas the temperature effect on nanofluids largely depends on the type of nanoparticle and base fluid pairing. A recent study by Lee et al [26] introduced round-robin tests on thermal conductivity measurements of three samples of EG-based ZnO nanofluids. The experiments were conducted in five laboratories, where four of them used measurement apparatuses developed in house and one used a commercial device.…”

Section: Review Of Experimental Evidencementioning

confidence: 99%