Natural convection from four circular cylinders in across arrangement within horizontal annular space

• Autorzy: Laidoudi Houssem

Identyfikatory

DOI

10.2478/ama-2020-0014

• Języki publikacji: EN

Abstrakty

EN

Numerical investigation is accomplished to study the roles of governing parameters of natural convection on the fluid motion and heat transfer rate of four heated circular cylinders placed inside a circular enclosure of cold surface. The cylinders are positioned in across arrangement. The representative results are obtained within the ranges of initial conditions as: Prandtl number (Pr = 7.1 to 1000) and Rayleigh number (Ra = 103 to 105). The average Nusselt number of each inner cylinder is computed. The effects of thermal buoyancy strength on the fluid motion and temperature are also illustrated. It was found that the heat transfer rate of cylinders depends significantly on the position inside the enclosure. Moreover, the role of Prandtl number on flow and thermal patterns is negligible. The values of Nusselt number are also given, which can be useful for some engineering applications.

Słowa kluczowe

EN

natural convection; multiple cylinders; annular space; heat transfer; numerical simulation

• Wydawca: Oficyna Wydawnicza Politechniki Białostockiej
• Czasopismo: Acta Mechanica et Automatica
• Rocznik: 2020
• Tom: Vol. 14, no. 2
• Strony: 98--102
• Opis fizyczny: Bibliogr. 22 poz., rys., tab., wykr.

Twórcy

autor

Laidoudi Houssem

• Laboratory of Sciences and Marine Engineering, Faculty of Mechanical Engineering, USTO-MB, BP 1505, El-Menaouer, Oran, 31000, Algeria

Bibliografia

• 1. Abu-Nada E., Masoud Z., Hijazi A.(2008), Natural convection heat transfer enhancement in horizontal concentric annuli using nanofluids, International Communications in Heat and Mass Transfer, 35, 657–665.
• 2. Aly A.M.(2017), Natural convection over circular cylinders in a porous enclosure filled with a nanofluid under thermo-diffusion effects, Journal of the Taiwan Institute of Chemical Engineers, 70, 88–103.
• 3. Arbaban M., Salimpour M.R.(2014), Enhancement of laminar natural convective heat transfer in concentric annuli with radial fins using nanofluids, Heat Mass Transfer, 47, 5181–5188.
• 4. Char M., Lee G.C.(1989), Maximum density effects on natural convection of micropolar fluids between horizontal eccentric cylinders, Jnt. J. Engng Sci., 36, 157–169.
• 5. Eid E.I. (2011) Experimental study of free convection in an elliptical annular enclosure in blunt and slender orientations, Heat Mass Transfer, 47, 81–91.
• 6. El-maghlany W., Abo-elazm, M., Shahata A., Eldrainy Y.(2016), Mixed convection in an eccentric annulus filled by copper nanofluide, Thermal Science, 20, 1597–1608.
• 7. HaM.Y., Kim J.G. (2004), Numerical simulation of natural convection in annuli with internal fins, KSME International Journal, 18, 718–730.
• 8. Hadidi H., Manshadi M.K.D., Kamali R.(2020), Natural convection of power-law fluids inside an internally finned horizontal annulus. Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, 44, 415–425.
• 9. Ho C.J., Lin Y. H., Chen T.C. (1989), A numerical study of natural convection in concentric and eccentric horizontal cylindrical annuli with mixed boundary conditions. International Journal of Heat and Fluid Flow, 10, 40–47.
• 10. Hussein A.K.(2013), Computational analysis of natural convection in a parallelogrammic cavity with a hot concentric circular cylinder moving at different vertical locations, International Communications in Heat and Mass Transfer, 46, 126–133.
• 11. Iqbala Z., Syed K. S., Ishaq M.(2017), Optimum configurations of annulus with triangular fins for laminar convection, Thermal Science, 21, 161–173.
• 12. Kozlov N. (2018),Steady flow in an annulus with a varying number of deflectors at rotational vibration, Fluid Dynamic Research, 50, 051402.
• 13. Kuehn T.H., Goldstein R.J.(1976), An experimental and theoretical study of natural convection in the annulus between horizontal concentric cylinders, Journal of Fluid Mechanics, 74, 695–719.
• 14. Laidoudi H. (2020), Buoynacy-driven flow in annular space from two circular cylinders in tandem arrangement, Mutallurgical and Materials Engineering, 26, 87–102.
• 15. Laidoudi H., Helmaoui M., Bouzit M., Ghenaim A. (2020) Natural convection of Newtonian fluids between two concentric cylinders of a special cross-sectional form, Thermal Science, 00, 00–00. 10.2298/TSCI200201190L.
• 16. Masoumi H., Aghighi M.S., Ammar A.(2019), Laminar natural convection of yield stress fluids in annular spaces between concentric cylinders, International Journal of Heat and Mass Transfer, 138, 1188–1198.
• 17. Matin M.H., Khan W.A.(2013), Laminar natural convection of non-Newtonian power-law fluids between concentric circular cylinders, International Communications in Heat and Mass Transfer, 43, 112–121.
• 18. Nada S.A., Said M.A.(2019), Effects of fins geometries, arrangements, dimensions and numbers on natural convection heat transfer characteristics in finned-horizontal annulus, International Journal of Thermal Sciences, 137, 121–137.
• 19. Nasiri D., Dehghan A. A., Hadian M. R.(2017), Conjugate natural convection between horizontal eccentric Cylinders, Heat Mass Transfer, 53, 799–811.
• 20. Pandey S., Park Y. G., Ha M. Y.(2019), An exhaustive review of studies on natural convection in enclosures with and without internal bodies of various shapes, International Journal of Heat and Mass Transfer, 138, 762–795.
• 21. Sheikhzadeh G. A., Arbaban M., Mehrabian M. A. (2013), Laminar natural convection of Cu-water nanofluid in concentric annuli with radial fins attached to the inner cylinder, Heat Mass Transfer, 49, 391–403
• 22. Zhang H.L., Tao W.Q., Wu Q.J.(1992), Numerical Simulation of natural convection in circular enclosures with inner polygonal cylinders, with confirmation by experimental results. J. of Thermal Science, 1, 249–258.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).