Evaluation of Heat Transfer and Fluid Dynamics across a Backward Facing Step for Mobile Cooling Applications Utilizing CNT Nanofluid in Laminar Conditions
DOI:
https://doi.org/10.37934/cfdl.16.10.140153Keywords:
Backward Facing Step, CFD, Nanoparticles, Heat Transfer, laminar flow, Fluid Flow, Cooling ApplicationAbstract
In a variety of engineering applications, the efficacy of heat dissipation in mobile cooling systems is greatly influenced by the Backward Facing Step. Its significance in optimizing cooling solutions for mobile devices is highlighted by the fact that its design and fluid dynamics are crucial in minimizing skin friction and improving passive heat transfer. In this paper, we present a verification of an advanced numerical model for heat transfer and fluid flow through a Backward Facing Step, used in mobile cooling. The objective of this study is to explore fluid separation, a method enhancing passive heat transfer and reducing skin friction. ANSYS/FLUENT software has been used to solve the backward facing step in a horizontal duct filled with pure water. Carbon nanotube (CNT) dispresed into the base fluid at different volume fractions of 0.2%, 0.65%, and 1%. This study focused on laminar flow conditions ranging from Reynolds numbers 200 to 900. In order to reduce the computation time and ensuring the accuracy and reliability of numerical simulations, a grid independence study has been conducted. The findings revealed a substantial rise in the average Nusselt number and heat transfer coefficient with increased Reynolds number and volume fraction of nanoparticles. Specifically, the nanofluid (CNT/water) exhibited the highest average Nusselt number and heat transfer coefficient with volume fractions 1%. Furthermore, the research showed a decrease in the skin friction factor as both Reynolds number increased and nanoparticles’ volume fraction decreased. The increments of nanoparticles' concentrations lead to increase viscosity, promotes agglomeration, alters flow behaviour by inducing turbulence, and enhances heat transfer. These factors collectively contribute to higher skin friction due to increased resistance to fluid flow and disrupted streamline patterns
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Al-Aswadi, A. A., H. A. Mohammed, N. H. Shuaib, and Antonio Campo. "Laminar forced convection flow over a backward facing step using nanofluids." International Communications in Heat and Mass Transfer 37, no. 8 (2010): 950-957. https://doi.org/10.1016/j.icheatmasstransfer.2010.06.007
Kherbeet, A. Sh, H. A. Mohammed, B. H. Salman, Hamdi E. Ahmed, and Omer A. Alawi. "Experimental and numerical study of nanofluid flow and heat transfer over microscale backward-facing step." International Journal of Heat and Mass Transfer 79 (2014): 858-867. https://doi.org/10.1016/j.ijheatmasstransfer.2014.08.074
Islam, Md Saifi Bin, Muhammad Faiz Ahmed, and Abdullah Al Saad. "Numerical Investigation on the Aerodynamic Characteristics of a Wing for Various Flow and Geometrical Parameters." Malaysian Journal on Composites Science and Manufacturing 12, no. 1 (2023): 13-30. https://doi.org/10.37934/mjcsm.12.1.1330
Goldstein, R. J., V. L. Eriksen, R. M. Olson, and E. R. G. Eckert. "Laminar separation, reattachment, and transition of the flow over a downstream-facing step." (1970): 732-739. https://doi.org/10.1115/1.3425124
Zaidan, Maki Haj, Aadel Abdul Razzaq Alkumait, and Thamir Khalil Ibrahim. "Numerical investigation of forced convection flow over backward facing step affected by a baffle position." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 52, no. 1 (2018): 33-45.
Hilo, Ali Kareem, Antonio Acosta Iborra, Mohammed Thariq Hameed Sultan, and Mohd Faisal Abdul Hamid. "Effect of corrugated wall combined with backward-facing step channel on fluid flow and heat transfer." Energy 190 (2020): 116294. https://doi.org/10.1016/j.energy.2019.116294
Alawi, Omer A., and Haslinda Mohamed Kamar. "Performance of Solar Thermal Collector Using Multi-Walled Carbon Nanotubes: Simulation Study." Journal of Advanced Research in Micro and Nano Engineering 2, no. 1 (2020): 12-21.
Kaska, Sheren A., Rafeq A. Khalefa, and Adnan M. Hussein. "Hybrid nanofluid to enhance heat transfer under turbulent flow in a flat tube." Case Studies in Thermal Engineering 13 (2019): 100398. https://doi.org/10.1016/j.csite.2019.100398
Azeez, Kafel, Ayad Fouad Hameed, and Adnan M. Hussein. "Nanofluid heat transfer augmentation in a double pipe heat exchanger." In AIP Conference Proceedings, vol. 2213, no. 1. AIP Publishing, 2020. https://doi.org/10.1063/5.0000243
A.M. Hussein, K. V. Sharma, R. A. Bakar, K. Kadirgama (2014). A review of forced convection heat transfer enhancement and hydrodynamic characteristics of a nanofluid. Renewable and Sustainable Energy Reviews, 29, 734-743. https://doi.org/10.1016/j.rser.2013.08.014
Hussein, Adnan M., K. V. Sharma, R. A. Bakar, and K. Kadirgama. "The effect of cross sectional area of tube on friction factor and heat transfer nanofluid turbulent flow." International Communications in Heat and Mass Transfer 47 (2013): 49-55.https://doi.org/10.1016/j.icheatmasstransfer.2013.06.007 .
Hussein, Adnan M., K. V. Sharma, R. A. Bakar, and K. Kadirgama. "The effect of nanofluid volume concentration on heat transfer and friction factor inside a horizontal tube." Journal of Nanomaterials 2013 (2013): 1-12. https://doi.org/10.1155/2013/859563
Abu-Nada, Eiyad. "Application of nanofluids for heat transfer enhancement of separated flows encountered in a backward facing step." International Journal of Heat and Fluid Flow 29, no. 1 (2008): 242-249. https://doi.org/10.1016/j.ijheatfluidflow.2007.07.001
Ekiciler, Recep. "A CFD investigation of Al2O3/water flow in a duct having backward-facing step." Journal of Thermal Engineering 5, no. 1 (2019): 31-41. https://doi.org/10.18186/thermal.512999
Zarda, Falah, Adnan Mohammed Hussein, Suad H. Danook, and Barhm Mohamad. "Enhancement of thermal efficiency of nanofluid flows in a flat solar collector using CFD." Diagnostyka 23 (2022). https://doi.org/10.29354/diag/156384
Kherbeet, A. Sh, H. A. Mohammed, K. M Munisamy, and B. H. Salman. "Effect of base fluid on mixed convection nanofluid flow over microscale backward-facing step." Journal of Computational and Theoretical Nanoscience 12, no. 10 (2015): 3076-3089. https://doi.org/10.1166/jctn.2015.4083
Togun, Hussein, Mohammad R. Safaei, Rad Sadri, Salim N. Kazi, Ahmed Badarudin, Kamel Hooman, and Emad Sadeghinezhad. "Numerical simulation of laminar to turbulent nanofluid flow and heat transfer over a backward-facing step." Applied Mathematics and Computation 239 (2014): 153-170. https://doi.org/10.1016/j.amc.2014.04.051
Vaferi, Kourosh, Mohammad Vajdi, Amir Shadian, Hamed Ahadnejad, Farhad Sadegh Moghanlou, Hossein Nami, and Haleh Jafarzadeh. "Modeling and optimization of hydraulic and thermal performance of a tesla valve using a numerical method and artificial neural network." Entropy 25, no. 7 (2023): 967. https://doi.org/10.3390/e25070967
Vijian, Rashmeera Siva, Mostafa Yusefi, and Kamyar Shameli. "Plant extract loaded sodium alginate nanocomposites for biomedical applications: A review." Journal of Research in Nanoscience and Nanotechnology 6, no. 1 (2022): 14-30. https://doi.org/10.37934/jrnn.6.1.1430
Ilyas, Rushdan Ahmad, Salit Mohd Sapuan, Mohamad Ridzwan Ishak, and Edi Syams Zainudin. "Water transport properties of bio-nanocomposites reinforced by sugar palm (Arenga Pinnata) nanofibrillated cellulose." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 51, no. 2 (2018): 234-246.
Nekahi, Sahar, Kourosh Vaferi, Sanam Nekahi, Mohammad Vajdi, Farhad Sadegh Moghanlou, Nilgun Baydogan, and Mehdi Shahedi Asl. "Finned heat exchangers made of TiB2–SiC–graphene composites with enhanced heat transfer performance." Journal of the Brazilian Society of Mechanical Sciences and Engineering 45, no. 9 (2023): 497. https://doi.org/10.1007/s40430-023-04362-z
Na’aim Abd Rahim, Mohammad, Mohd Shukor Salleh, Sivarao Subramonian, Mohamad Ridzuan Mohamad Kamal, and Salah Salman Al-Zubaidi. "Influence of Graphene on the Microstructure and Mechanical Properties of Aluminium Matrix Composite." Malaysian Journal on Composites Science and Manufacturing 12, no. 1 (2023): 73-83. https://doi.org/10.37934/mjcsm.12.1.7383
Awad, Afrah Turki, and Muayad Waleed Muayad. "Experimental heat transfer study of an enhanced storage medium." Journal of Energy Storage 73 (2023): 108953. https://doi.org/10.1016/j.est.2023.108953
AWAD, Afrah Turki, and Kamal Jalal Tawfeeq ALBAZZAZ. "NUMERICAL INVESTIGATION OF A HIGH-TEMPERATURE ENERGY STORAGE. http://dx.doi.org/10.47832/2717-8234.13.12
Vaferi, Kourosh, Mohammad Vajdi, Sahar Nekahi, Amir Heydari, Farhad Sadegh Moghanlou, Hossein Nami, and Haleh Jafarzadeh. "Thermo-hydraulic performance optimization of a disk-shaped microchannel heat sink applying computational fluid dynamics, artificial neural network, and response surface methodology." Heliyon 9, no. 10 (2023). https://doi.org/10.1016/j.heliyon.2023.e21031
Fahmy, M., M. Morsy, H. Abd Elshakour, and A. M. Belal. "Effect of thermal insulation on building thermal comfort and energy consumption in Egypt." Journal of Advanced Research in Applied Mechanics 43, no. 1 (2018): 8-19.
Terhaar, S., A. Velazquez, J. R. Arias, and M. Sanchez-Sanz. "Experimental study on the unsteady laminar heat transfer downstream of a backwards facing step." International Communications in Heat and Mass Transfer 37, no. 5 (2010): 457-462. https://doi.org/10.1016/j.icheatmasstransfer.2010.01.009
Kherbeet, A. Sh, H. A. Mohammed, B. H. Salman, Hamdi E. Ahmed, Omer A. Alawi, and M. M. Rashidi. "Experimental study of nanofluid flow and heat transfer over microscale backward-and forward-facing steps." Experimental Thermal and Fluid Science 65 (2015): 13-21. https://doi.org/10.1016/j.expthermflusci.2015.02.023
Ibrahim, Zainab Ali, Qusay Kamil Jasim, and Adnan Mohammed Hussein. "The impact of alumina nanoparticles suspended in water flowing in a flat solar collector." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 65, no. 1 (2020): 1-12.
Hussein, Adnan Mohammed. "Adaptive Neuro-Fuzzy Inference System of friction factor and heat transfer nanofluid turbulent flow in a heated tube." Case Studies in Thermal Engineering 8 (2016): 94-104. https://doi.org/10.1016/j.csite.2016.06.001
Abdulmajeed, Bassma Abbas, and Noor Sabih Majeed. "Study and Analysis of Concentric Shell and Double Tube Heat Exchanger Using Tio2 Nanofluid." Iraqi Journal of Chemical and Petroleum Engineering 18, no. 4 (2017): 15-23. https://doi.org/10.31699/IJCPE.2017.4.2
Hussein, Adnan M., Rosli Abu Bakar, K. Kadirgama, and Korada Viswanatha Sharma. "Heat transfer enhancement using nanofluids in an automotive cooling system." International Communications in Heat and Mass Transfer 53 (2014): 195-202. https://doi.org/10.1016/j.icheatmasstransfer.2014.01.003
Hussein, Adnan M., Omar S. Khaleell, and Suad H. Danook. "Enhancement of double-pipe heat exchanger effectiveness by using water-CuO." NTU Journal of Engineering and Technology 1, no. 2 (2022): 18-22. https://doi.org/10.56286/ntujet.v1i2.59
Azeez, Kafel, Zainab Ali Ibrahim, and Adnan Mohammed Hussein. "Thermal conductivity and viscosity measurement of ZnO nanoparticles dispersing in various base fluids." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 66, no. 2 (2020): 1-10.
Hussein, Adnan M., Rosli Abu Bakar, Kumaran Kadirgama, and K. V. Sharma. "Experimental measurements of nanofluids thermal properties." International Journal of Automotive and Mechanical Engineering 7 (2013): 850-863. https://doi.org/10.15282/ijame.7.2012.5.0070
You, Xiangcheng, and Shiyuan Li. "Fully developed opposing mixed convection flow in the inclined channel filled with a hybrid nanofluid." Nanomaterials 11, no. 5 (2021): 1107. https://doi.org/10.3390/nano11051107
Sudarmadji Sudarmadji, Bambang SAP. "Performance Evaluation Criterion of Nanofluid." Microfluidics and Nanofluidics (2018): 277.https://doi.org/10.5772/intechopen.74610
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