پیوندهای مفید
آمار
| تعداد نشریات | 21 |
| تعداد شمارهها | 687 |
| تعداد مقالات | 9,985 |
| تعداد مشاهده مقاله | 70,957,076 |
| تعداد دریافت فایل اصل مقاله | 62,422,382 |
Buoyancy driven heat transfer of a nanofluid in a differentially heated square cavity under effect of an adiabatic square baffle | ||
| Journal of Heat and Mass Transfer Research | ||
| مقاله 1، دوره 2، شماره 2 - شماره پیاپی 4، بهمن 2015، صفحه 1-13 اصل مقاله (3.36 M) | ||
| نوع مقاله: Full Length Research Article | ||
| شناسه دیجیتال (DOI): 10.22075/jhmtr.2015.350 | ||
| نویسندگان | ||
| Mostafa Mahmoodi1؛ Mohammad Hemmat Esfe* 2 | ||
| 1Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran | ||
| 2Faculty of mechanical engineering, Semnan university, Semnan, Iran | ||
| تاریخ دریافت: 10 آذر 1392، تاریخ بازنگری: 31 تیر 1393، تاریخ پذیرش: 09 دی 1394 | ||
| چکیده | ||
| Buoyancy driven heat transfer of Cu-water nanofluid in a differentially heated square cavity with an inner adiabatic square baffle at different positions is studied numerically. The left and right walls of the cavity are at temperatures of Th and Tc, respectively that Th > Tc, while the horizontal walls are insulated. The governing equations are discretized using the finite volume method while the SIMPLER algorithm is used to couple velocity and pressure fields. A parametric study is conducted and effects of Rayleigh number (103 to 106), the position of the baffle (six different positions), and the volume fraction of nanoparticles (0 to 0.1) on flow pattern, temperature distribution and heat transfer inside the cavity are investigated. The obtained results show that the rate of heat transfer is enhanced with increase of both Rayleigh number and volume fraction of nanoparticles. Moreover it is found that based on the Rayleigh number, the effect of position of the baffle on the rate of heat transfer varies. At all Rayleigh number considered, when the baffle is located in the core of the cavity, maximum rate of heat transfer occurs. Also the position of the baffle has a minimum effect on the rate of heat transfer at Ra = 106. | ||
| کلیدواژهها | ||
| Natural convection؛ Nanofluids؛ Cavity؛ Adiabatic Body؛ numerical study | ||
| مراجع | ||
|
[1] Santra, A.K., Sen, S., Chakraborty, N., Study of heat transfer due to laminar flow of copper–water nanofluid through two isothermally heated parallel plates, Int. J. Thermal Sci. 48 (2009) 391–400. [2] Das, S.K., Putra, N., Roetzel, W., Pool boiling characterization of nano-fluids, Int. J. Heat Mass Tranf. 46 (2003) 851-862. [3] Akbarinia A., Behzadmehr, A., Numerical study of laminar mixed convection of a nanofluid in horizontal curved tubes, Appl. Thermal Eng. 27 (2007) 1327–1337. [4] Akbari M., Behzadmehr A., Shahraki, F., Fully developed mixed convection in horizontal and inclined tubes with uniform heat flux using nanofluid, Int. J. Heat Fluid Flow 29 (2008) 545–556. [5] Arefmanesh, A., Mahmoodi, M., Effects of uncertainties of viscosity models for Al2O3-water nanofluid on mixed convection numerical simulations, Int. J. Thermal Sci. 50 (2011) 1706-1719. [6] Mazrouei Sebdani, S., Mahmoodi, M., Hashemi, S.M., Effect of nanofluid variable properties on mixed convection in a square cavity, Int. J. Thermal Sci., In Press. [7] Khanafer, K., Vafai K., Lightstone M., Buoyancy-driven heat transfer enhancement in a two-dimensional enclosure utilizing nanofluid, Int. J. Heat Mass Tran. 46 (2003) 3639-3653. [8] Oztop H.F., Abu-Nada E., Numerical study of natural convection in partially heated rectangular enclosures filled with nanofluids. Int. J. Heat Fluid Flow 29 (2008) 1326–1336. [9] Abu-nada, E., Oztop H., Effect of inclination angle on natural convection in enclosures filled with Cu-Water nanofluid, Int. J. Heat Fluid Flow 30 (2009) 669–678. [10] Aminossadati, S.M., Ghasemi, B., Natural convection cooling of a localized heat source at the bottom of a nanofluid-filled enclosure. Eur. J. Mech. B/Fluids 28 (2009) 630–640. [11] Ögüt, E.B., Natural convection of Water-based nanofluids in an inclined enclosure with a heat source, Int. J. Thermal Sci. 48 (2009) 2063–2073. [12] Lin K.C., Violi A., Natural convection heat transfer of nanofluids in a vertical cavity: Effects of non-uniform particle diameter and temperature on thermal conductivity, Int. J. Heat Fluid Flow 31 (2010) 236-245. [13] Sheikhzadeh G.A., Arefmanesh A., Kheirkhah M.H., Abdollahi R., Natural convection of Cu-water nanofluid in a cavity with partially active side walls, Eur. J. Mech. B/Fluids 30 (2011) 166-176. [14] Saleh H., Roslan R., Hashim I., Natural convection heat transfer in a nanofluid-filled trapezoidal enclosure, Int. J. Heat Mass Trans. 54 (2011) 194–201. [15] Sheikhzadeh G.A., Arefmanesh A., Mahmoodi M., Numerical Study of Natural Convection in a Differentially-Heated Rectangular Cavity Filled with TiO2-Water Nanofluid, J. Nano Res. 13 (2011) 75-80. [16] Ghasemi, B., Aminossadati, S.M., Raisi, A., Magnetic field effect on natural convection in a nanofluid-filled square enclosure, Int. J. Thermal Sci. 50 (2011) 1748-1756. [17] Mahmoodi, M, Numerical simulation of free convection of a nanofluid in L-shaped cavities, Int. J. Thermal Sci. 50 (2011) 1731-1740. [18] Asan, H., Natural convection in an annulus between two isothermal concentric square ducts, Int. Comm. Heat Mass Trans. 27 (2000) 367-376. [19] Mezrhab, A., Bouali, H., Amaoui, H., Bouzidi, M., Computation of combined natural-convection and radiation heat-transfer in a cavity having a square body at its center, Appl. Energy 83 (2006) 1004–1023. [20] Tasnim, S.H, Collins, M.R., Suppressing natural convection in a differentially heated square cavity with an arc shaped baffle, Int. Comm. Heat Mass Trans. 32 (2005) 94–106. [21] Altac, Z., zen Kurtul, Ö, Natural convection in tilted rectangular enclosures with a vertically situated hot plate inside, Appl. Thermal Eng. 27 (2007) 1832–1840. [22] Ben-Nakhi, A., Chamkha, A.J., Conjugate natural convection in a square enclosure with inclined thin fin of arbitrary length, Int. J. Thermal Sci. 46 (2007) 467–478. [23] Kasayapanand, N., A computational fluid dynamics modeling of natural convection in finned enclosure under electric field, Appl. Thermal Eng. 29 (2009) 131–141. [24] Xu, X, Yu, Z., Hu, Y., Fan, L., Cen, K., A numerical study of laminar natural convective heat transfer around a horizontal cylinder inside a concentric air-filled triangular enclosure, Int. J. Heat Mass Trans. 53 (2010) 345–355. [25] Chen, W.R., Natural convection heat transfer between inner sphere and outer vertically eccentric cylinder, Int. J. Heat Mass Trans. 53 (2010) 5147–5155. [26] Abu-Nada, E., Masoud, Z., Hijazi, A., Natural convection heat transfer enhancement in horizontal concentric annuli using nanofluids, Int. Comm. Heat Mass Trans. 35 (2008) 657–665. [27] Abouali, O., Falahatpisheh, A., Numerical investigation of natural convection of Al2O3 nanofluid in vertical annuli, Heat Mass Trans. 46 (2009) 15–23. [28] Abu-Nada, E., Effects of variable viscosity and thermal conductivity of Al2O3–water nanofluid on heat transfer enhancement in natural convection, Int. J. Heat Fluid Flow 30 (2009) 679–690. [29] Mahmoudi, A.H., Shahi, M., Shahedin, A.M., Hemati, N., Numerical modeling of natural convection in an open cavity with two vertical thin heat sources subjected to a nanofluid, Int. Comm. Heat Mass Trans. 38 (2011) 110–118. [30] Mahmoudi, A.H., Shahi, M., Honarbakhsh Raouf, A., Ghasemian, A., Numerical study of natural convection cooling of horizontal heat source mounted in a square cavity filled with nanofluid, Int. Comm. Heat Mass Trans. 37 (2010) 1135–1141. [31] Abbasian, A.A., Mahmoodi, M, Amini, M, Free convection in a nanofluid filled square cavity with an horizontal heated plate, Def. Diff. Forum 312-315 (2011) 433-438. [32] Mahmoodi, M., Numerical simulation of free convection of nanofluid in a square cavity with an inside heater, Int. J. Thermal Sci. 50 (2011) 2161-2175. [33] M. Mahmoodi a, Saeed Mazrouei Sebdani, Natural convection in a square cavity containing a nanofluid and an adiabatic square block at the center, Superlatt. Microstruc. 52 (2012) 261–275 [34] Chung, T.J., Computational fluid dynamic, Cambridge University Press, United Kingdom, 2002. [35] Hoffman, J.D., Numerical Methods for Engineers and Scientists, second ed. Markel Dekker Inc, New York, 2001. [36] Barakos, G., Mitsoulis, E., Natural convection flow in a square cavity revisited: laminar and turbulent models with wall fraction, Int. J. Numer. Methods Fluids 18 (1994) 695-719. [37] Davis, G.V., Natural convection of air in a square cavity, a benchmark numerical solution, Int. J. Numer. Methods Fluids 3 (1983) 249-264. [38] Fusegi, T., Hyun, J.M., Kawahara, K., Farouk, B., A numerical study of three-dimensional natural convection in a differentially heated cubical enclosure, Int. J. Heat Mass Transfer 34 (1991) 1543-1557. [39] Markatos, N.C., Pericleous, K.A., Laminar and turbulent natural convection an enclosed cavity, Int. J. Heat Mass Transfer 27 (1984) 772-775. [40] Stella, F., Bucchignani, E., True Transient vorticity-velocity method using preconditioned Bi-CGSTAB, Numer. Heat Transfer B, (1996) 315-339. | ||
|
آمار تعداد مشاهده مقاله: 3,347 تعداد دریافت فایل اصل مقاله: 2,746 |
||