Abstract
Bu çalışmada serpantin mikrotüpteki nanoakışkan akışı sayısal olarak incelenmiştir. Çalışma, üç boyutlu laminer akış (750≤Re≤2000) koşulunda gerçekleştirilmiştir. Sayısal analizlerde, çalışma akışkanı olarak farklı nanopartikül hacim oranına (%1.0, %2.0, %3.0) sahip Al2O3 – su nanoakışkanı kullanılmıştır. Ayrıca uzun yaprak, plaket ve silindirik nanopartikül şekilleri için çalışmalar yapılmıştır. Ortalama Nusselt sayıları ve ortalama Darcy sürtünme faktörleri, serpantin mikrotüplerdeki nanoakışkan akışının akış ve ısı transfer performansını hesaplamak etmek için kullanılmıştır. Mikrotüp içindeki hız ve sıcaklık dağılımları da tüm farklı durumlar için incelenmiştir. Çalışmanın sayısal sonuçları, ortalama Nusselt sayısı ve ortalama Darcy sürtünme faktörünün Reynolds sayısı, nanopartikül şekli ve nanopartikül hacim oranı ile değişimi olarak sunulmuştur. Sonuç olarak, en yüksek ısı transfer performansı, Al2O3-su nanoakışkanın %3.0 nanopartikül hacim oranı ile plaket nanopartikül şekli için elde edilmiştir.
References
- Aliabadi, M., Rahimpour, F., Sartipzadeh, O., Pazdar, S. (2017). Heat transfer enhancement by combination of serpentine curves and nanofluid flow in microtube. Experimental Heat Transfer, 30(3), 235-252.
- Bejan,A,.(2013) . Convection Heat Transfer, John Wiley & Sons ,(4), Hoboken NJ.
- Choi, S U.S., and Eastman, J A. (1995). Enhancing thermal conductivity of fluids with nanoparticles. United States: N. p.
- Corcione, M. (2010). Heat transfer features of buoyancy-driven nanofluids inside rectangular enclosures differantially heated at the sidewalls. International Journal Thermal Science, (49), 1536-1546.
- Elias, M., Mahbubul, M., Saidur, R., Sohel, R., Shahrul, M., Khaleduzzaman, S., Sadeghipour, S. (2014). Experimental investigation on the thermo-physical properties of Al2O3 nanoparticles suspended in car radiator coolant, International Commonications in Heat and Mass Transfer, (54), 48-53.
- Ismail, M. ve Fotowat, S. (2015). Simulation of Al2O3-ATF nanofluid in a compact heat exchanger, Proceedings of the 2nd International Conference on Fluid Flow,Heat and Mass Transfer, 149-157.
- Sahin, B., Comaklı, K., Comaklı, O., Yılmaz, M. (2015). Nanoakışkanlar ile ısı transferinin iyileştirilmesi, Mühendis ve Makine Cilt-Engineer and Machine, 47(559), 29-34.
- Timofeeva, E., Routbort, J., Singh, D. (2009). Particle shape effects on thermophysical properties of alümina nanofluids, J. Appl. Physical, 106.
- Timofeeva, E., Yu, W., France, D., Singh, D., Routbort, J. (2011). Nanofluids for heat transfer: an engineering approach, Nanoscale Research Letters , 6-13.
- Vanaki, M., Mohammed, H., Abdollahi, A., Wahid, M. (2004). Effect of nanoparticle shapes on the heat transfer enhancement in a wavy channel with different phase shifts, Journal Mol. Liq., (196), 577-588.
Abstract
The nanofluid flow in serpentine microtube was numerically investigated in this study. The study has been carried out in three-dimensional laminar flow (750≤Re≤2000) condition. Al2O3 – water nanofluid with different nanoparticle volume fractions (1.0%, 2.0%, 3.0%) have been used as the working fluid in the numerical analyzes. In addition, studies were carried out for blade, platelet and cylindrical nanoparticle shapes. The average Nusselt numbers and the average Darcy friction factors have been used to estimate the flow and heat transfer performance of nanofluid flow in serpentine microtubes. Velocity and temperature distributions inside the microtube were also examined for different cases. Numerical results of the study have been presented as the variation of average Nusselt number and average Darcy friction factor with Reynolds number, nanoparticle shape and nanoparticle volume fraction. As a result, the highest convective heat transfer performance has been obtained for platelet nanoparticle shape of the Al2O3-water nanofluid with 3.0% nanoparticle volume fraction.
References
- Aliabadi, M., Rahimpour, F., Sartipzadeh, O., Pazdar, S. (2017). Heat transfer enhancement by combination of serpentine curves and nanofluid flow in microtube. Experimental Heat Transfer, 30(3), 235-252.
- Bejan,A,.(2013) . Convection Heat Transfer, John Wiley & Sons ,(4), Hoboken NJ.
- Choi, S U.S., and Eastman, J A. (1995). Enhancing thermal conductivity of fluids with nanoparticles. United States: N. p.
- Corcione, M. (2010). Heat transfer features of buoyancy-driven nanofluids inside rectangular enclosures differantially heated at the sidewalls. International Journal Thermal Science, (49), 1536-1546.
- Elias, M., Mahbubul, M., Saidur, R., Sohel, R., Shahrul, M., Khaleduzzaman, S., Sadeghipour, S. (2014). Experimental investigation on the thermo-physical properties of Al2O3 nanoparticles suspended in car radiator coolant, International Commonications in Heat and Mass Transfer, (54), 48-53.
- Ismail, M. ve Fotowat, S. (2015). Simulation of Al2O3-ATF nanofluid in a compact heat exchanger, Proceedings of the 2nd International Conference on Fluid Flow,Heat and Mass Transfer, 149-157.
- Sahin, B., Comaklı, K., Comaklı, O., Yılmaz, M. (2015). Nanoakışkanlar ile ısı transferinin iyileştirilmesi, Mühendis ve Makine Cilt-Engineer and Machine, 47(559), 29-34.
- Timofeeva, E., Routbort, J., Singh, D. (2009). Particle shape effects on thermophysical properties of alümina nanofluids, J. Appl. Physical, 106.
- Timofeeva, E., Yu, W., France, D., Singh, D., Routbort, J. (2011). Nanofluids for heat transfer: an engineering approach, Nanoscale Research Letters , 6-13.
- Vanaki, M., Mohammed, H., Abdollahi, A., Wahid, M. (2004). Effect of nanoparticle shapes on the heat transfer enhancement in a wavy channel with different phase shifts, Journal Mol. Liq., (196), 577-588.
Details
| Primary Language | English |
|---|---|
| Subjects | Engineering |
| Journal Section | Articles |
| Authors | |
| Publication Date | November 30, 2021 |
| Published in Issue | Year 2021 Issue: 28 |
