GEOMETRY EFFECTS ON THERMOHYDRAULIC BEHAVIOR OF FLUID FLOW IN A SQUARE ENCLOSURE WITH AN INNER CIRCULAR TUBE

Abstract

Convective heat transfer in non-circular channels are of interest in many industrial applications. In the present work, fluid flow in the space between a square channel and a circular tube with different positions of the holder rigid plate is investigated numerically. The use of holder plates is applicable in industrial applications. Holder plates allow different flows with different thermal and hydrodynamic behaviors in a channel at constant Reynolds numbers. Six geometries selected to explore the effect of the position of holder plate on heat transfer rate. Results demonstrated that the plate position has significant effects on fluid flow behavior. It is found that hydrodynamic and thermal behavior affected by the plate position for different Reynolds numbers. ­ For example, for the case that the circular tube is positioned in the center of the square channel with two inclined plates, average convective heat transfer outside and between the two plates is 344 Wm^-2K^-1 and 465 Wm^-2K^-1, respectively.

Keywords

• Square Channel,Forced Convection,Numerical Simulation,Holder Rigid Plate,Reynolds Number

References

1. [1] Choi. S.U.S., Eastman. J.A. (1995). Enhancing thermal conductivity of fluids S with nanoparticles. In Developments and Applications of Non-Newtonian Flows. Volume FED-231/MD-66. Siginer DA, Wang HP, editor. ASME, New York, 99–105.
2. [2] Murshed SS, De Castro CN. (2011). Forced convective heat transfer of nanofluids in minichannels. InTwo Phase Flow, Phase Change and Numerical Modeling. InTech.
3. [3] Mirmasoumi. S , Behzadmehr. A. (2008). Numerical study of laminar mixed convection of a nanofluid in a horizontal tube using two-phase mixture model. Applied Thermal Engineering.;28(7). 717-27.
4. [4] Pishkar. I, Ghasemi. B. (2012). Effect of nanoparticles on mixed convection heat transfer in a horizontal channel with heat source. Modares Mechanical Engineering. 12(2):95-108.
5. [5] Vasefi. I, Alizadeh. M. (2013). A numerical investigation of CuO–water nanofluid in different geometries by two-phase Euler–Lagrange method. World Appl Sci J. 26(10). 1323-9.
6. [6] Heris. SZ, Talaii. E, Noie. SH. (2012). CuO/water nanofluid heat transfer through triangular ducts. Iran. J. Chem. Eng.;9(1). 23-32.
7. [7] Ho. CJ, Chen. MW, Li. ZW. (2008). Numerical simulation of natural convection of nanofluid in a square enclosure: effects due to uncertainties of viscosity and thermal conductivity. International Journal of Heat and Mass Transfer. 51(17). 4506-16.
8. [8] Ben Mansour. R, Galanis. N, Nguyen.(2009). CT. Developing laminar mixed convection of nanofluids in an inclined tube with uniform wall heat flux. International Journal of Numerical Methods for Heat & Fluid Flow. 19(2). 146-64.

9. [9] Nguyen. CT, Roy. G, Gauthier. C, Galanis. N.(2007). Heat transfer enhancement using Al 2 O 3–water nanofluid for an electronic liquid cooling system. Applied Thermal Engineering. 27(8):1501-6.
10. [10] Heris. SZ, Esfahany. MN, Etemad. G. (2007). Numerical investigation of nanofluid laminar convective heat transfer through a circular tube. Numerical Heat Transfer, Part A: Applications. 52(11). 1043-58.
11. [11] Shah. RK, London. AL. (2014). Laminar flow forced convection in ducts: a source book for compact heat exchanger analytical data. Academic press.
12. [12] Zhang. LZ. (2007). Laminar flow and heat transfer in plate-fin triangular ducts in thermally developing entry region. International Journal of Heat and Mass Transfer. 50(7). 1637-40.
13. [13] Heyhat. MM, Kowsary. F. (2010). Effect of particle migration on flow and convective heat transfer of nanofluids flowing through a circular pipe. Journal of Heat Transfer. 132(6). 062401.
14. [14] A. Bejan. (2013). Convection Heat Transfer, 4th Edition, Wiley.
15. [15] Pak. BC, Cho. YI. (1998). Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles. Experimental Heat Transfer an International Journal. 11(2). 151-70.
16. [16] Hamilton. RL, Crosser. OK.(1962). Thermal conductivity of heterogeneous two-component systems. Industrial & Engineering chemistry fundamentals. 1(3). 187-91.
17. [17] Kalteh. M, Abbassi. A, Saffar-Avval. M, Frijns. A, Darhuber. A, Harting. J. (2012). Experimental and numerical investigation of nanofluid forced convection inside a wide microchannel heat sink. Applied Thermal Engineering. 36. 260-8.
18. [18] Chon. CH, Kihm. KD, Lee. SP, Choi. SU. (2005). Empirical correlation finding the role of temperature and particle size for nanofluid (Al 2 O 3) thermal conductivity enhancement. Applied Physics Letters. 87(15). 153107.
19. [19] Nguyen. CT, Desgranges. F, Roy. G, Galanis. N, Maré. T, Boucher. S, Mintsa. HA. (2007). Temperature and particle-size dependent viscosity data for water-based nanofluids–hysteresis phenomenon. International Journal of Heat and Fluid Flow. 28(6):1492-506.
20. [20] Sieder. EN, Tate. GE. (1936). Heat transfer and pressure drop of liquids in tubes. Industrial & Engineering Chemistry. 28(12). 1429-35.
21. [21] Erdinc. MT, Yilmaz. T. (2018). Numerical Investigation of Flow and Heat Transfer in Communicating Converging and Diverging Channels, Journal of Thermal Engineering, 4(5), 2318-2332.