پیوندهای مفید
آمار
| تعداد نشریات | 21 |
| تعداد شماره‌ها | 610 |
| تعداد مقالات | 9,028 |
| تعداد مشاهده مقاله | 67,082,840 |
| تعداد دریافت فایل اصل مقاله | 7,656,343 |
An experimental investigation of rheological characteristics of non- Newtonian nanofluids | ||
| Journal of Heat and Mass Transfer Research | ||
| مقاله 3، دوره 1، شماره 1، مرداد 2014، صفحه 17-23 اصل مقاله (965.06 K) | ||
| نوع مقاله: Full Length Research Article | ||
| شناسه دیجیتال (DOI): 10.22075/jhmtr.2014.150 | ||
| نویسندگان | ||
| Milad Tajik Jamal-Abad1؛ Maziar Dehghan1؛ Seyfolah Saedodin1؛ Mohammad Sadegh Valipour1؛ Amirhossein Zamzamian* 2 | ||
| 1Faculty of Mechanical Engineering, Semnan University, Semnan, Iran | ||
| 2Materials and Energy Research Center (MERC), Karaj, Iran | ||
| تاریخ دریافت: 13 مرداد 1392، تاریخ بازنگری: 23 مهر 1392، تاریخ پذیرش: 25 آبان 1392 | ||
| چکیده | ||
| Rheological characteristics of Al2O3, CuO and TiO2 nano particles were investigated in oil as the base fluid at 1 and 2 wt.%. Constitutive relations for non-Newtonian fluid were discussed based on the power-law model. Measured viscosities of each nanofluid were used to evaluate the power-law and consistency index. Results indicated that the nanofluid viscosity decreased by increasing the concentration. Oil showed shear thickening behavior while nanofluids showed shear thinning behavior. An increase in nano-particle concentration caused a decrease in the power-law index beside an increase in the consistency index. Moreover, the present study showed that the effective viscosity of fluids would be decreased by nanoparticle addition at some wt.% and some shear rates. Furthermore, results showed that the classic models for nanofluid viscosity couldn’t predict their real values of nano fluid viscosity, as the measured values are less than the predicted ones. | ||
| کلیدواژه‌ها | ||
| Nanofluids؛ viscosity؛ Rheological characteristics؛ Power-law index؛ Consistency index | ||
| مراجع | ||
|
[1]. B.C. Pak, Y.I. Cho, “Hydrodynamic and Heat Transfer Study of Dispersed Fluids with Submicron Metallic Oxide Particles,” Experimental Heat Transfer, 11 (2), 151-170 (1998).
[2]. S.K. Das, N. Putra, W. Roetzel, “Pool Boiling Characteristics of Nano- fluids,” International Journal of Heat and Mass Transfer, 46 (5), 851-862 (2003).
[3]. M. Mirzaei, M. Dehghan, “Investigation of flow and heat transfer of nanofluid in microchannel with variable property approach”, Heat Mass Transfer, 49, 1803-1811 (2013).
[4]. S.Z. Heris, S.G. Etemad, M.N. Esfahany, “Experimental Investigation of Oxide Nanofluids Laminar Flow Convective Heat Transfer,” Int. Comm. Heat Mass Trans., 33(4), 529-535 (2006).
[5]. D.P. Kulkarni, D.K. Das, G.A. Chukwu, “Temperature Dependent Rheological Property of Copper Oxide Nanoparticles Suspension (Nanofluid),” J. Nanoscience Nanotechnology, 6(4), 1150-1154 (2006).
[6]. T. Phuoc, M. Massoudi, R. Chen., “Viscosity and thermal conductivity of nanofluids containing multi-walled carbon nanotubes stabilized by chitosan,” International Journal of Thermal Sciences, 50, 12-18 (2011).
[7]. A. Einstein, “Eine neue Bestimmung der Molekuldimension,” Annalen der Physik, 19, 289-306 (1906).
[8]. J. Yang, F. Li, W. Zhou, Y. He, B. Jiang , “Experimental investigation on the thermal conductivity and shear viscosity of viscoelastic-fluid-based nanofluids”, International Journal of Heat and Mass Transfer, 55, 3160-3166 (2012).
[9]. P. Ravi, S. David, W. Jinlin, “Measurement of nanofluid viscosity and its implications for thermal applications”. Applied Phys. Lett., 89 (13), 133108- 133108-3 (2006).
[10]. S. Lee, S. Park, S. Kang, I. Bang, J. Kim , “Investigation of viscosity and thermal conductivity of SiC nanofluids for heat transfer applications,” International Journal of Heat and Mass Transfer, 54, 433-438 (2011).
[11]. A.Utomo, H. Poth, P. Robbins, A. Pacek , “Experimental and theoretical studies of thermal conductivity, viscosity and heat transfer coefficient of titania and alumina nanofluids” ,International Journal of Heat and Mass Transfer, 55, 7772–7781 (2012).
[12]. H. Chen, Y. Ding, Y. He, C. Tan, “Rheological behavior of ethylene glycol based titania nanofluids”, Chem. Phys. Lett. 444, 333–337 (2007).
[13]. H. Chen, S. Witharana, Y. Jin, C. Kimd, Y. Ding, “Predicting thermal conductivity of liquid suspensions of nanoparticles based on rheology”, Particuology 7, 151–157 (2009).
[14]. M. Kole, T.K. Dey, “Viscosity of alumina nanoparticles dispersed in car engine coolant,” Experimental Thermal and Fluid Science, 34, 677–683 (2010).
[15]. M. Nabeel Rashin, J. Hemalatha, “Viscosity studies on novel copper oxide–coconut oil nanofluid,” Experimental Thermal and Fluid Science, 48, 67–72 (2013).
[16]. M. Hojjat, S.Gh. Etemad, R. Bagheri, J. Thibault, “Rheological characteristics of non-Newtonian nanofluids: Experimental investigation”, International Communications in Heat and Mass Transfer, 38, 144–148 (2011).
[17]. M. Kole, T.K. Dey, “Thermophysical and pool boiling characteristics of ZnO-ethylene glycol nanofluids”, International Journal of Thermal Sciences 62, 61-70 (2012).
[18]. M.T. Jamal-Abad, A. Zamzamian, M. Dehghan, Experimental studies on the heat transfer and pressure drop characteristics of Cu-water and Al-water nanofluids in a spiral coil, Experimental Thermal and Fluid Science, 47, 206–212 (2013).
[19]. F.M. White, “Viscous Fluid Flow”, third ed. McGraw-Hill, New York, 2006.
[20]. M. Dehghan, H. Basirat Tabrizi, On near-wall behavior of particles in a dilute turbulent gas–solid flow using kinetic theory of granular flows, Powder Technology, 224, 273–280 (2012).
[21]. M. Dehghan, H. Basirat Tabrizi, Turbulence effects on the granular model of particle motion in a boundary layer flow, Canadian Journal of Chemical Engineering, 92, 189–195 (2014).
[22]. M. Dehghan, H. B. Tabrizi, Effects of coupling on turbulent gas-particle boundary layer flows at borderline volume fractions using kinetic theory, Journal of Heat and Mass Transfer Research, 1, 1-8 (2014).
[23]. M. Dehghan, M. Mirzaei, A. Mohammadzadeh, Numerical formulation and simulation of a non-Newtonian magnetic fluid flow in the boundary layer of a stretching sheet, Journal of Modeling in Engineering, 11 (34), 73-82 (2013).
[24]. G. Astarita and G. Marrucci, “Principles of Non-Newtonian Fluid Mechanics”, McGraw-Hill (UK), (1974).
[25]. D.C. Leigh, “Non-Newtonian fluids and the second law of thermodynamics”, Physics of Fluids, 5, 501–502 (1962).
[26]. B.D. Coleman, H. Markovitz, W. Noll, “Viscometric Flows of Non-Newtonian Fluids”, Springer-Verlag, (1966).
[27]. H.C. Brinkman, “The Viscosity of Concentrated Suspensions and Solution”, J. Chem. Phys. 20, 571-581(1952).
[28]. D.A. Drew, D.A. Passman, “Theory of Multicomponent Fluids”, Springer, Berlin, (1999).
[29]. H.I. Andersson, B.S. Dandapat, “Flows of a power law fluid over a stretching sheet”. Stability Appl Anal Continuous Media,1, 339–347 (1991).
[30]. M. Dehghan, M. Mirzaei, M.S. Valipour, S. Saedodin, Flow of a non-Newtonian fluid over a linearly moving sheet at a transient state; new similarity variable and numerical solution scheme, Journal of Modeling in Engineering, (2014) (accepted in press). | ||
|
آمار تعداد مشاهده مقاله: 7,532 تعداد دریافت فایل اصل مقاله: 4,700 |
||