Effect of various surfactants on stability and thermophysical properties of nanofluids

被引:51
|
作者
Wang, Jin [1 ,2 ]
Li, Guolong [1 ]
Li, Tan [1 ]
Zeng, Min [2 ]
Sunden, Bengt [3 ]
机构
[1] Hebei Univ Technol, Sch Energy & Environm Engn, Tianjin 300401, Peoples R China
[2] Xi An Jiao Tong Univ, Minist Educ, Key Lab Thermofluid Sci & Engn, Xian 710049, Peoples R China
[3] Lund Univ, Dept Energy Sci, Div Heat Transfer, S-22100 Lund, Sweden
关键词
Nanofluid; Thermal conductivity; Carbon nanotube; Viscosity; Surfactant; CONVECTIVE HEAT-TRANSFER; WALLED CARBON NANOTUBES; THERMAL-CONDUCTIVITY; HYBRID NANOFLUID; FE3O4; NANOFLUID; MAGNETIC-FIELD; VISCOSITY; WATER; SIZE; PIPE;
D O I
10.1007/s10973-020-09381-9
中图分类号
O414.1 [热力学];
学科分类号
摘要
The effect of Fe3O4 nanoparticles and carbon nanotubes (CNTs) on the viscosity of a nanofluid is experimentally investigated from 278 to 313 K by changing the nanoparticle volume fraction. These nanoparticles were put into distilled water with various surfactants, i.e., Colace (docusate sodium), trisodium citrate dihydrate (TSC), polyvinyl pyrrolidone, cetyl trimethylammonium bromide, tetramethylammonium hydroxide (TMAH), acacia senegal (GA), sodium dodecyl benzene sulfonate, sodium dodecyl sulfate (SDS), and sodium laurylsulfonate (SLS). Based on the present measurements, new empirical formulas are proposed for Fe3O4-water, CNT-water and Fe3O4-CNT-water nanofluids to provide accurate predictions for the nanofluid viscosity. Based on the viscosity testing, stabilities and thermal conductivities of Fe3O4-TMAH, Fe3O4-Colace, Fe3O4-TSC, CNT-SDS, CNT-GA, Fe3O4-CNT-SLS, and Fe3O4-CNT-TSC nanofluids with a volume concentration of 0.5% are investigated in the present research. Results indicate that better stability, smaller viscosity, and higher thermal conductivity are obtained, when the surfactants TMAH, SDS, and SLS are added into the Fe3O4-water, CNT-water, and the Fe3O4-CNT-water nanofluid, respectively. The CNT-water and Fe3O4-CNT-water nanofluids exhibit a shear-thinning behavior, whereas a linear rheological behavior can be observed by water-based Colace-Fe3O4, TMAH-Fe3O4, and TSC-Fe3O4 nanofluids.
引用
收藏
页码:4057 / 4070
页数:14
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