Open Access Open Access  Restricted Access Subscription or Fee Access

Study of the Impacts of Different Geometry and Aspect Ratio Hot Body on Natural Convection Heat Transfer


(*) Corresponding author


Authors' affiliations


DOI: https://doi.org/10.15866/irease.v15i5.22178

Abstract


This work deals with a two-dimensional laminar natural convection heat flow, based on the temperature difference between the cold outer corrugated cylinder and three different cross-sectional areas, i.e. circular, square, and triangle configuration at the steady-state condition. The free region between two surfaces has been filled by a fluid with (Pr=7.0), and CFD finite volume method has been employed to solve the main equations. The simulations have been performed based on the dimensionless parameters: (Ra=104-105-106), (D/Dbase, and L/Dbased), while θ=0°-90°-180° has been applied for square and triangle configuration. The results are displayed in terms of isothermal contours and stream function and the heat transfer is recognized by both local and average Nusselt number. Firstly, the ANSYS 19.2 code validation has been performed by the comparisons of the outer data with previously theoretical papers, and good agreements have been detected. It is initiated from the local and average Nusselt number that the heat transfer from the inner hot surface has been affected by the above governing parameters at a certain fixed value of Ra. In all the results of the valve of average Nu approximately constant for the same configuration when Ra<106 also, flow lines become fewer symmetrical when Ra=106. It is detected that both the cylinder aspect ratio and coordinations have a significant effect on the thermal fields and flow distribution. Moreover, the results that designate the changing of D/Dbase to 0.3 cause improvement in heat transfer by 23.3% at Ra=106, and also the circular cylinder is better than the other configurations.
Copyright © 2022 Praise Worthy Prize - All rights reserved.

Keywords


Natural Convection; Laminar Flow; Isothermal Cylinders; Rayleigh Number; Finite Volume; Simplic Metho; Corrugated Cavity

Full Text:

PDF


References


G. Cesini, M. Paroncini, G. Cortellab, & M. Manzan, Natural convection from a horizontal cylinder in a rectangular cavity, Int. J. Heat Mass Transf. 42 (1999) 1801e1811.
https://doi.org/10.1016/S0017-9310(98)00266-X

N. K. Ghaddar, Natural convection heat transfer between a uniformly heated cylindrical element and its rectangular enclosure, Int. J. Heat Mass Transf. 35 (1992) 2327e2334.
https://doi.org/10.1016/0017-9310(92)90075-4

B. Kim, D. Lee, M. Ha, & H. Yoon, A numerical study of natural convection in a square enclosure with a circular cylinder at different vertical locations, Int. J. of Heat and Mass Transfer, vol.51, pp. 1888-1906, 2008.
https://doi.org/10.1016/j.ijheatmasstransfer.2007.06.033

Sheikholeslami, M., Gorji-Bandpy, M., Ganji, D. D., Soleimani, S., & Seyyedi, S. M., Natural convection of nanofluids in an enclosure between a circular and a sinusoidal cylinder in the presence of magnetic field. International Communications in Heat and Mass Transfer, 39(9), 1435-1443.
https://doi.org/10.1016/j.icheatmasstransfer.2012.07.026

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. International Journal of Heat and Mass Transfer, 53(1-3), 345-355.
https://doi.org/10.1016/j.ijheatmasstransfer.2009.09.023

Sheikholeslami, M., Gorji-Bandpy, M., Pop, I., & Soleimani, S.. Numerical study of natural convection between a circular enclosure and a sinusoidal cylinder using control volume based finite element method. International Journal of Thermal Sciences, 72, 147-158.
https://doi.org/10.1016/j.ijthermalsci.2013.05.004

Sheikholeslami, M., Gorji-Bandpy, M., Ganji, D. D., & Soleimani, S., MHD natural convection in a nanofluid filled inclined enclosure with sinusoidal wall using CVFEM. Neural Computing and Applications, 24(3-4), 873-882.
https://doi.org/10.1007/s00521-012-1316-4

Roslan. R, Saleh. H, & Hashim.I. Natural Convection in a Differentially Heated Square Enclosure with a Solid Polygon. Scientific World Journal Volume 2014, Article ID 617492, 11 pages
https://doi.org/10.1155/2014/617492

Qusay R., Farooq H. & Qusay A. Computational Study of Mixed Heat Convection in Annular Space between Concentric Rotating Inner and Wavy Surface Outer Cylinders, Pertanika J. Sci. & Technol. 27 (4): 1991 - 2013 (2019)

Singh, S., Panigrahi, P. & Muralidhar, K. Effect of buoyancy on the wakes of circular and square cylinders: a schlieren-interferometric study, Exp. Fluids, Vol. 43, 2007 , pp: 101-123
https://doi.org/10.1007/s00348-007-0329-8

Ko , B. , Lee, W. & Chung, B. Turbulent mixed convection heat transfer experiments in a vertical cylinder using analogy concept, Nuclear Engineering and Design, Vol. 240, 2010, pp: 3967-3973.
https://doi.org/10.1016/j.nucengdes.2010.03.019

Yoon H. S., Jung J. H., & Park. Y. G., Natural convection in a square enclosure with two horizontal cylinders. Numerical Heat Transfer, Part A, 62: 701-721, 2012 Taylor & Francis Group, LLC
https://doi.org/10.1080/10407782.2012.709438

Qusai Adnan Mahdi, Mohammed Kadhim Hamza, Ayad J Kadhim, Roaya M. Study of Natural Convection Inside Corrugated Enclosure Containing Heated Thin Rectangle Plate Journal of Mechanical Engineering Research and Developments, Vol. 44 (2), 2021 pp:22-35

Hussein M. M. Jassim, Farooq H. Ali, Qusay R. Al. Amir, Hameed K. Hamzah, & Salwan Obaid Waheed Khafaji, Entropy Generation Analysis of a Natural Convection Inside a Sinusoidal Enclosure with Different Shapes of Cylinders, Front. Heat Mass Transf. (FHMT) 12 (22) (2019).
https://doi.org/10.5098/hmt.12.22

Ammar Abdulkadhim, Hameed K. Hamzah, Farooq H. Al, Azher M. Abed, & Isam Mejbel Abed Natural convection among inner corrugated cylinders inside wavy enclosure filled with nanofluid superposed in porous-nanofluid layers, International Communications in Heat and Mass Transfer 109 (2019) 104350.
https://doi.org/10.1016/j.icheatmasstransfer.2019.104350

Asma Samadzadeh, Saeed Z, Ishak H, & Omid M An experimental investigation on natural convection of non-covalently functionalized MWCNTs nanofluids: Effects of aspect ratio and inclination angle International Communications in Heat and Mass Transfer 111 (2021) (2):104473.
https://doi.org/10.1016/j.icheatmasstransfer.2019.104473

J. Rostami, Unsteady natural convection in an enclosure with vertical wavy walls, Heat Mass Transf. 44 (9) (2008) 1079-1087.
https://doi.org/10.1007/s00231-007-0349-1

J. N. Reddy, An Introduction to the Finite Element Method, McGraw-Hill, New York, 1993.

G. H. R. Kefayati, Simulation of heat transfer and entropy generation of MHD natural convection of non-newtonian nanofluid, Int. J. Heat Mass Transf. 29 (2016) 1066-1089.
https://doi.org/10.1016/j.ijheatmasstransfer.2015.09.078

A. I. Alsabery, et al., Effect of rotating solid cylinder on entropy generation and convective heat transfer in a wavy porous cavity heated from below, Int. Commun. Heat Mass Transf. 95 (2018) 197-209.
https://doi.org/10.1016/j.icheatmasstransfer.2018.05.003

S. H. Hussain, & M. S. Rahomey, Comparison of natural convection around a circular cylinder with different geometries of cylinders inside a square enclosure filled with ag-nanofluid superposed porous-nanofluid layers, J. Heat Transf. 141 (2) (2019) 022501.
https://doi.org/10.1115/1.4039642

Yuan, X., Tavakkoli, F., & Vafai, K. Analysis of natural convection in horizontal concentric annuli of varying inner shape. Numerical Heat Transfer, Part A: Applications, 68(11), 1155-1174. (2015).
https://doi.org/10.1080/10407782.2015.1032016

H. F. Oztop, et al., A heatline analysis of natural convection in a square inclined enclosure filled with a CuO nanofluid under non-uniform wall heating condition, Int. J. Heat Mass Transf. 55 (19-20) 5076-5086.(2012)
https://doi.org/10.1016/j.ijheatmasstransfer.2012.05.007

Hussein Mahmood J. ; Farooq H ; Qusai A. Mahdi & Nizar J. Effect of parallel and orthogonal sinusoidal walls on mixed convection inside square enclosure containing rotating cylinder. 2017 8th International Conference on Mechanical and Aerospace Engineering (ICMAE).

Ndiaye, P., Ndiaye, M., Mbow, C., Ndiaye, G., Influence of Reynolds and Prandtl Numbers on Thin Film Condensation in Forced Convection in a Canal Covered with a Porous Material, (2020) International Journal on Engineering Applications (IREA), 8 (5), pp. 178-187.
https://doi.org/10.15866/irea.v8i5.18678

Rajamohan, G., Narayanaswamy, R., & Kumar, P., Experimental study on mixed convection heat transfer in a square duct with varying: inclination angles. Journal of Science and Technology, 23(1), 141-151. (2015).

Sumon, S., Sonkolon, B., Balaram, K., Sabir S., Mohammad N. Hasan & Suvash C. Saha Conjugate natural convection in a corrugated solid partitioned differentially heated square cavity. Numerical Heat Transfer, Part A: Applications, 1-19.(2020).
https://doi.org/10.1080/10407782.2020.1803609

Aimad, K., Adel, S., Mezian, B., et al., CFD analysis of natural convection between two superposed fluids: role of corrugated bottoms. Journal Chemical Engineering Communications, (2021) Published by Taylor & Francis Online ISSN: 1563-5201.
https://doi.org/10.1080/00986445.2021.1976162

Abdelhafez, E., Fava, S., Performance of a PV Module Using Water Based Titanium Oxide Nano Fluid Coated Fins, (2022) International Journal on Energy Conversion (IRECON), 10 (2), pp. 52-59.
https://doi.org/10.15866/irecon.v10i2.21816


Refbacks

  • There are currently no refbacks.


Please send any question about this web site to info@praiseworthyprize.com
Copyright © 2005-2024 Praise Worthy Prize