Anthony Chukwujekwu Okafor, Tobechukwu Kingsley Abor, Saidanvar Esanjonovich Valiev, Ignatius Echezona Ekengwu, Abiodun Saka, Monday U. Okoronkwo
{"title":"使用 GnP、TiO2、MoS2、Al2O3 纳米颗粒配制的高油酸植物油基混合纳米流体在 MQL 加工中的导热特性分析","authors":"Anthony Chukwujekwu Okafor, Tobechukwu Kingsley Abor, Saidanvar Esanjonovich Valiev, Ignatius Echezona Ekengwu, Abiodun Saka, Monday U. Okoronkwo","doi":"10.1007/s10765-024-03472-7","DOIUrl":null,"url":null,"abstract":"<div><p>This paper presents the results of thermal conductivity characterization of six high oleic soybean oil (HOSO) and four high oleic canola oil (HOCO)-based hybrid nanofluids formulated with four types of nanoparticles (Graphene nanoplatelet (xGnP), TiO<sub>2</sub>, MoS<sub>2</sub>, and Al<sub>2</sub>O<sub>3</sub>) at nanoparticles wt% concentration from 1 % to 7 % in 1 % increment using the two-step method for use in MQL machining of difficult-to-cut metals. Thermal conductivity of the formulated hybrid nanofluids were measured using Thermtest Transient Hot Wire Liquid Thermal Conductivity Meter at temperatures from 25 °C to 75 °C in increment of 10 °C. Obtained results showed that thermal conductivity of all nanofluids decreases linearly with temperature, while the thermal conductivity enhancement increases nonlinearly with increase in wt% concentration, following second order polynomial. At 7-wt% nanoparticle concentration, hybrid nanofluids xGnP-TiO<sub>2</sub>/HOSO gave the highest thermal conductivity enhancement (109.73 % and 103.31 % at 25 and 75 °C) followed by xGnP-TiO<sub>2</sub>/HOCO (101.36 % and 97.52 % at 25 °C and 75 °C), xGnP-MoS<sub>2</sub>/HOCO (101.36 % and 97.52 % at 25 °C and 75 °C), xGnP-MoS<sub>2</sub>/HOSO (96.3 % and 96.89 % at 25 °C and 75 °C), xGnP-Al<sub>2</sub>O<sub>3</sub>/HOCO (91.62 % and 83.23 % at 25 °C and 75 °C), xGnP-Al<sub>2</sub>O<sub>3</sub>/HOSO (91.25 % and 83.23 % at 25 °C and 75 °C). xGnP hybrid nanofluids are recommended for MQL machining. TiO<sub>2</sub>–MoS<sub>2</sub>/HOSO, TiO<sub>2</sub>–MoS<sub>2</sub>/HOCO, MoS<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>/HOSO, TiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>/HOSO hybrid nanofluids gave the lowest thermal conductivities and are not recommended as base fluids due to their insignificant thermal conductivity enhancement. Thermal conductivity of the hybrid nanofluids is lower than that of mono-nanofluids, but there are other inherent properties that could be beneficial.</p></div>","PeriodicalId":598,"journal":{"name":"International Journal of Thermophysics","volume":"45 12","pages":""},"PeriodicalIF":2.5000,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Thermal Conductivity Characterization of High Oleic Vegetable Oils Based Hybrid Nanofluids Formulated Using GnP, TiO2, MoS2, Al2O3 Nanoparticles for MQL Machining\",\"authors\":\"Anthony Chukwujekwu Okafor, Tobechukwu Kingsley Abor, Saidanvar Esanjonovich Valiev, Ignatius Echezona Ekengwu, Abiodun Saka, Monday U. Okoronkwo\",\"doi\":\"10.1007/s10765-024-03472-7\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This paper presents the results of thermal conductivity characterization of six high oleic soybean oil (HOSO) and four high oleic canola oil (HOCO)-based hybrid nanofluids formulated with four types of nanoparticles (Graphene nanoplatelet (xGnP), TiO<sub>2</sub>, MoS<sub>2</sub>, and Al<sub>2</sub>O<sub>3</sub>) at nanoparticles wt% concentration from 1 % to 7 % in 1 % increment using the two-step method for use in MQL machining of difficult-to-cut metals. Thermal conductivity of the formulated hybrid nanofluids were measured using Thermtest Transient Hot Wire Liquid Thermal Conductivity Meter at temperatures from 25 °C to 75 °C in increment of 10 °C. Obtained results showed that thermal conductivity of all nanofluids decreases linearly with temperature, while the thermal conductivity enhancement increases nonlinearly with increase in wt% concentration, following second order polynomial. At 7-wt% nanoparticle concentration, hybrid nanofluids xGnP-TiO<sub>2</sub>/HOSO gave the highest thermal conductivity enhancement (109.73 % and 103.31 % at 25 and 75 °C) followed by xGnP-TiO<sub>2</sub>/HOCO (101.36 % and 97.52 % at 25 °C and 75 °C), xGnP-MoS<sub>2</sub>/HOCO (101.36 % and 97.52 % at 25 °C and 75 °C), xGnP-MoS<sub>2</sub>/HOSO (96.3 % and 96.89 % at 25 °C and 75 °C), xGnP-Al<sub>2</sub>O<sub>3</sub>/HOCO (91.62 % and 83.23 % at 25 °C and 75 °C), xGnP-Al<sub>2</sub>O<sub>3</sub>/HOSO (91.25 % and 83.23 % at 25 °C and 75 °C). xGnP hybrid nanofluids are recommended for MQL machining. TiO<sub>2</sub>–MoS<sub>2</sub>/HOSO, TiO<sub>2</sub>–MoS<sub>2</sub>/HOCO, MoS<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>/HOSO, TiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>/HOSO hybrid nanofluids gave the lowest thermal conductivities and are not recommended as base fluids due to their insignificant thermal conductivity enhancement. Thermal conductivity of the hybrid nanofluids is lower than that of mono-nanofluids, but there are other inherent properties that could be beneficial.</p></div>\",\"PeriodicalId\":598,\"journal\":{\"name\":\"International Journal of Thermophysics\",\"volume\":\"45 12\",\"pages\":\"\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2024-11-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Thermophysics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10765-024-03472-7\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Thermophysics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10765-024-03472-7","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Thermal Conductivity Characterization of High Oleic Vegetable Oils Based Hybrid Nanofluids Formulated Using GnP, TiO2, MoS2, Al2O3 Nanoparticles for MQL Machining
This paper presents the results of thermal conductivity characterization of six high oleic soybean oil (HOSO) and four high oleic canola oil (HOCO)-based hybrid nanofluids formulated with four types of nanoparticles (Graphene nanoplatelet (xGnP), TiO2, MoS2, and Al2O3) at nanoparticles wt% concentration from 1 % to 7 % in 1 % increment using the two-step method for use in MQL machining of difficult-to-cut metals. Thermal conductivity of the formulated hybrid nanofluids were measured using Thermtest Transient Hot Wire Liquid Thermal Conductivity Meter at temperatures from 25 °C to 75 °C in increment of 10 °C. Obtained results showed that thermal conductivity of all nanofluids decreases linearly with temperature, while the thermal conductivity enhancement increases nonlinearly with increase in wt% concentration, following second order polynomial. At 7-wt% nanoparticle concentration, hybrid nanofluids xGnP-TiO2/HOSO gave the highest thermal conductivity enhancement (109.73 % and 103.31 % at 25 and 75 °C) followed by xGnP-TiO2/HOCO (101.36 % and 97.52 % at 25 °C and 75 °C), xGnP-MoS2/HOCO (101.36 % and 97.52 % at 25 °C and 75 °C), xGnP-MoS2/HOSO (96.3 % and 96.89 % at 25 °C and 75 °C), xGnP-Al2O3/HOCO (91.62 % and 83.23 % at 25 °C and 75 °C), xGnP-Al2O3/HOSO (91.25 % and 83.23 % at 25 °C and 75 °C). xGnP hybrid nanofluids are recommended for MQL machining. TiO2–MoS2/HOSO, TiO2–MoS2/HOCO, MoS2–Al2O3/HOSO, TiO2–Al2O3/HOSO hybrid nanofluids gave the lowest thermal conductivities and are not recommended as base fluids due to their insignificant thermal conductivity enhancement. Thermal conductivity of the hybrid nanofluids is lower than that of mono-nanofluids, but there are other inherent properties that could be beneficial.
期刊介绍：
International Journal of Thermophysics serves as an international medium for the publication of papers in thermophysics, assisting both generators and users of thermophysical properties data. This distinguished journal publishes both experimental and theoretical papers on thermophysical properties of matter in the liquid, gaseous, and solid states (including soft matter, biofluids, and nano- and bio-materials), on instrumentation and techniques leading to their measurement, and on computer studies of model and related systems. Studies in all ranges of temperature, pressure, wavelength, and other relevant variables are included.
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