پیوندهای مفید
آمار
| تعداد نشریات | 8 |
| تعداد شمارهها | 435 |
| تعداد مقالات | 5,634 |
| تعداد مشاهده مقاله | 7,427,972 |
| تعداد دریافت فایل اصل مقاله | 6,216,020 |
تحلیل اثر مولد ورتکس بر عملکرد مبدل حرارتی اعوجاجی در جریان مغشوش نانوسیال تحت جریان مغناطیسی | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| مقاله 14، دوره 52، شماره 2، اردیبهشت 1399، صفحه 493-508 اصل مقاله (2.21 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2018.13975.5767 | ||
| نویسندگان | ||
| علی اکبر عباسیان آرانی* 1؛ سیاوش غلامی قلعه ناظری2 | ||
| 1دانشیار مهندسی مکانیک دانشکده مهندسی مکانیک دانشگاه کاشان کاشان ایران | ||
| 2گروه حرارت و سیالات - دانشکده مهندسی مکانیک - دانشگاه کاشان - کاشان - ایران | ||
| چکیده | ||
| مروزه در صنعت بهبود عملکرد و بهبود مصرف انرژی سامانههای حرارتی بسیار مورد توجه قرار گرفته است. استفاده از میدان مغناطیسی، موج دار کردن مبدل و استفاده از ذرات نانو روشهای نوینی است که برای بهبود عملکرد سیستمهای حرارتی حاوی جریان سیال کاربردی میباشد. گردابههای جریانی که به وسیلهی تراشههای بیرون آمده و یا زائدههایی همچون پره یا بالچه تشکیل میگردند در بهبود پدیده انتقال حرارت بسیار موثرند. در این تحقیق به بررسی و مقایسه اثر کاربرد میدان مغناطیسی و مولد ورتکس بر میدان جریان و انتقال حرارت در جابهجایی اجباری بهصورت تکی و همزمان درون مبدلحرارتی اعوجاجی پرداخته شده است. برای این منظور مبدل حرارتی اعوجاجی در هندسههای مختلف مولد ورتکس تحت میدان مغناطیسی در اعداد هارتمن و رینولدز مختلف نانوسیال شبیهسازی شده است. در این تحقیق جریان تراکم ناپذیر با استفاده از معادلات حاکم شبیه سازی شده است. دستگاه معادلات غیر خطی حاکم، با استفاده از حلگر فشار مبنا ی نرم افزار فلوئنت و بر اساس روش حجم محدود به صورت صریح حل شدهاند. نتایج نشان میدهند که با افزایش عدد رینولدز مقدار عدد ناسلت و ضریب اصطکاک به ترتیب افزایش و کاهش مییابد. همچنین با افزایش عدد هارتمن عدد ناسلت افزایش و ضریب اصطکاک کاهش مییابد. | ||
| کلیدواژهها | ||
| بهبود انتقال حرارت؛ مولد ورتکس؛ جریان مغشوش؛ مبدل حرارتی اعوجاجی | ||
| عنوان مقاله [English] | ||
| Effect of Vortex Generator on a Wavy Wall Heat Exchanger Performance for Turbulent Nanofluid Flow under a Magnetic Field | ||
| نویسندگان [English] | ||
| Ali Akbar Abbasian Arani1؛ Siavash Gholami Ghale Nazeri2 | ||
| 1Associate Professor Mechanical Engineering Department University of Kashan Kashan Iran | ||
| 2Heat and Fluid Flow Division, Mechanical Engineering department, University of Kashan, Kashan, Iran | ||
| چکیده [English] | ||
| Today, in the industry for improving the performance and reducing the energy consumption of thermal systems, much attention has been paid. Use of a magnetic field, wavy wall heat exchanger and dispersion of nanoscale particles are the new methods for improving the thermal systems performance containing fluid flow and heat transfer. Flow vortex, which is formed by means of chips, or appendages such as blades or fins, is very effective in improving the heat transfer rate. In this study, the effect of magnetic field application and vortex generator on the flow field and heat transfer in compulsory displacement is investigated separately and simultaneously inside the wavy wall heat exchanger. In the present work, a wavy wall heat exchanger is simulated in various geometries of the Vertex generator under magnetic fields in various Hartmann and Reynolds numbers filled with nanofluid. The system of nonlinear governing equations is solved explicitly using a fluent software based on the basic pressure solver and finite volume method. The results show that with increasing Reynolds number, the Nusselt number and friction coefficient increase and decrease respectively. As the Hartman number increases, the Nusselt number increases and the friction coefficient decreases. | ||
| کلیدواژهها [English] | ||
| Heat transfer improvement, Vertex generator, Turbulent flow, Wavy wall heat exchanger | ||
| مراجع | ||
|
[1] H. Heidary, M. Kermani, Effect of nano-particles on forced convection in sinusoidal-wall channel, International Communications in Heat and Mass Transfer, 37(10) (2010) 1520-1527. [2] C.-C. Wang, C.-K. Chen, Forced convection in a wavy-wall channel, International Journal of Heat and Mass Transfer, 45(12) (2002) 2587-2595. [3] L. Goldstein, E. Sparrow, Heat/mass transfer characteristics for flow in a corrugated wall channel, ASME, Transactions, Series C-Journal of Heat Transfer, 99 (1977) 187-195. [4] T. Rush, T. Newell, A. Jacobi, An experimental study of flow and heat transfer in sinusoidal wavy passages, International Journal of Heat and Mass Transfer, 42(9) (1999) 1541-1553. [5] M. Ahmed, N. Shuaib, M. Yusoff, Numerical investigations on the heat transfer enhancement in a wavy channel using nanofluid, International Journal of Heat and Mass Transfer, 55(21) (2012) 5891-5898. [6] L. Gong, K. Kota, W. Tao, Y. Joshi, Parametric numerical study of flow and heat transfer in microchannels with wavy walls, Journal of Heat Transfer, 133(5) (2011) 051702. [7] A.K. Santra, S. Sen, N. Chakraborty, Study of heat transfer due to laminar flow of copper-water nanofluid through two isothermally heated parallel plates, International Journal of Thermal Sciences, 48(2) (2009) 391-400. [8] G. Fabbri, Heat transfer optimization in corrugated wall channels, International Journal of Heat and Mass Transfer, 43(23) (2000) 4299-4310. [9] G. Fabbri, R. Rossi, Analysis of the heat transfer in the entrance region of optimised corrugated wall channel, International Communications in Heat and Mass Transfer, 32(7) (2005) 902-912. [10] A. Guzman, C. Amon, Dynamical flow characterization of transitional and chaotic regimes in converging–diverging channels, Journal of Fluid Mechanics, 321 (1996) 25-57. [11] Guzmán, C. Amon, Transition to chaos in converging– diverging channel flows: Ruelle–Takens–Newhouse scenario, Physics of Fluids, 6(6) (1994) 1994-2002. [12] Tashtoush, M. Al-Odat, Magnetic field effect on heat and fluid flow over a wavy surface with a variable heat flux, Journal of Magnetism and Magnetic Materials, 268(3) (2004) 357-363. [13] S. Parvin, N. Hossain, Finite element simulation of MHD combined convection through a triangular wavy channel, International Communications in Heat and Mass Transfer, 39(6) (2012) 811-817. [14] Celik, Solution of magnetohydrodynamic flow in a rectangular duct by Chebyshev collocation method, International Journal for Numerical Methods in Fluids, 66(10) (2011) 1325-1340. [15] A. Joardar, A. Jacobi, Heat transfer enhancement by winglet-type vortex generator arrays in compact plain- fin-and-tube heat exchangers, International Journal of Refrigeration, 31(1) (2008) 87-97. [16] M. Gentry, A. Jacobi, Heat transfer enhancement by delta-wing vortex generators on a flat plate: vortex interactions with the boundary layer, Experimental Thermal and Fluid Science, 14(3) (1997) 231-242. [17] T.-Y. Chen, H. Shu, Flow structures and heat transfer characteristics in fan flows with and without delta- wing vortex generators, Experimental Thermal and Fluid Science, 28(4) (2004) 273-282. [18] İ. KOTCİOĞLU, T. Ayhan, H. Olgun, B. AYHAN, Heat transfer and flow structure in a rectangular channel with wing-type vortex generator, Turkish Journal of Engineering and Environmental Sciences, 22(3) (1998) 185-196. [19] P.A. Sanders, K.A. Thole, Effects of winglets to augment tube wall heat transfer in louvered fin heat exchangers, International Journal of Heat and Mass Transfer, 49(21) (2006) 4058-4069. [20] J.-S. Leu, Y.-H. Wu, J.-Y. Jang, Heat transfer and fluid flow analysis in plate-fin and tube heat exchangers with a pair of block shape vortex generators, International Journal of Heat and Mass Transfer, 47(19) (2004) 4327-4338. [21] Y.-H. Zhang, L.-B. Wang, F. Ke, Y. Su, S. Gao, The effects of span position of winglet vortex generator on local heat/mass transfer over a three-row flat tube bank fin, Heat and Mass Transfer, 40(11) (2004) 881-891. [22] S.-Y. Yoo, D.-S. Park, M.-H. Chung, S.-Y. Lee, Heat transfer enhancement for fin-tube heat exchanger using vortex generators, Journal of Mechanical Science and Technology, 16(1) (2002) 109-115. [23] Allison, B. Dally, Effect of a delta-winglet vortex pair on the performance of a tube–fin heat exchanger, International Journal of Heat and Mass Transfer, 50(25) (2007) 5065-5072. [24] J.M. Jalil, H.K. Abdulla, A.H. Yusuf, Effect of winglet shape on heat transfer from heated cylinder in cross flow, Engineering Sciences, 17(2) (2006). [25] A. Joardar, A.M. Jacobi, Heat transfer enhancement by winglet-type vortex generator arrays in compact plain-fin-and-tube heat exchangers, International Journal of Refrigeration, 31(8) (2008) 87-97. [26] K.M. Kwak, K. Torii, K. Nishino, Heat transfer and pressure loss penalty for the number of tube rows of staggered finned-tube bundles with a single transverse row of winglets, International Journal of Heat and Mass Transfer, 46(1) (2003) 175-80. [27] L.H. Tang, M. Zeng, Q.W. Wang, Experimental and numerical investigation on air-side performance of fin-and-tube heat exchangers with various fin patterns, Experimental Thermal and Fluid Science, 33(5) (2009) 818-27. [28] M. Hemmat Esfe, P.M. Behbahani, A.A. Abbasian Arani, M.R. Sarlak, Thermal conductivity enhancement of SiO2–MWCNT (85: 15%)–EG hybrid nanofluids, Journal of Thermal Analysis and Calorimetry 128 (1) (2016) 249-258. [29] A.A. Abbasian Arani, H. Aberoumand, S. Aberoumand, A.J. Moghaddam, M. Dastanian, An empirical investigation on thermal characteristics and pressure drop of Ag-oil nanofluid in concentric annular tube, Heat and Mass Transfer, 52 (8) (2016), 1693-1706. [30] M. Hemmat Esfe, R. Karimpour, A.A. Abbasian Arani, J. Shahram, Experimental investigation on non-Newtonian behavior of Al2O3-MWCNT/5W50 hybrid nano-lubricant affected by alterations of temperature, concentration and shear rate for engine applications, International Communications in Heat and Mass Transfer, 82 (2017) 97-102. [31] M. Hemmat Esfe, H. Rostamian, A. Shabani- samghabadi, A. A. Abbasian Arani, Application of three-level general factorial design approach for thermal conductivity of MgO/water nanofluids, Applied Thermal Engineering, 127 (2017) 1194-1199. [32] M. Hemmat Esfe, H. Hajmohammad, R. Moradi, A.A. Abbasian Arani, Multi-objective optimization of cost and thermal performance of double walled carbon nanotubes/water nanofluids by NSGA-II using response surface method, Applied Thermal Engineering, 112 (2017) 1648-1657. [33] M. Hemmat Esfe, M. Rejvani, R.o Karimpour, A.A. Abbasian Arani, Estimation of thermal conductivity of ethylene glycol-based nanofluid with hybrid suspensions of SWCNT–Al2O3 nanoparticles by correlation and ANN methods using experimental data, Journal of Thermal Analysis and Calorimetry 128(3) (2017) 1359–1371. [34] A.A. Abbasian Arani, J. Amani, M. Hemmat Esfe, Numerical simulation of mixed convection flows in a square double lid-driven cavity partially heated using nanofluid, JOURNAL OF NANOSTRUCTURES 2 (3) (2012) 301-311. [35] M. Hemmat Esfe, M.H. Hajmohammad, P. Razi, M.R.H. Ahangar, A.A. Abbasian Arani, The optimization of viscosity and thermal conductivity in hybrid nanofluids prepared with magnetic nanocomposite of nanodiamond cobalt-oxide (ND- Co3O4) using NSGA-II and RSM, International Communications in Heat and Mass Transfer 79 (2016) 128-134. [36] M. Hemmat Esfe, A.A. Abbasian Arani, A.H. Niroumand, W.M. Yan, A. Karimipour, Mixed convection heat transfer from surface-mounted block heat sources in a horizontal channel with nanofluids, International Journal of Heat and Mass Transfer, 89 (2015) 783-791. [37] N.S. Akbar, A.W. Butt, Carbon nanotubes analysis for the peristaltic flow in curved channel with heat transfer, Applied Mathematics and Computation, 259 (2015) 231-241. [38] S. Nadeem, I. Shahzadi, Mathematical analysis for peristaltic flow of two phase nanofluid in a curved channel, Communications in Theoretical Physics, 64(5) (2015) 547. [39] S. Noreen, M. Qasim, Z. Khan, MHD pressure driven flow of nanofluid in curved channel, Journal of Magnetism and Magnetic Materials, 393 (2015) 490-497. [40] S. Shehzad, F. Abbasi, T. Hayat, F. Alsaadi, G. Mousa, Peristalsis in a curved channel with slip condition and radial magnetic field, International Journal of Heat and Mass Transfer, 91 (2015) 562-569. [41] M. Fakour, A. Vahabzadeh, D. Ganji, Study of heat transfer and flow of nanofluid in permeable channel in the presence of magnetic field, Propulsion and Power Research, 4(1) (2015) 50-62. [42] A. Dogonchi, M. Alizadeh, D. Ganji, Investigation of MHD Go-water nanofluid flow and heat transfer in a porous channel in the presence of thermal radiation effect, Advanced Powder Technology, 28(7) (2017) 1815-1825. | ||
|
آمار تعداد مشاهده مقاله: 1,019 تعداد دریافت فایل اصل مقاله: 1,012 |
||