Abstract
Heat transfer and flow field characteristics past surface-mounted finite height circular cylinder in the presence of vortex generators (VGs) have been investigated numerically. Aspect ratio of circular cylinder such that the ratio of height to diameter of cylinder is kept fixed as 2.0 and Reynolds number based on diameter of cylinder and free stream velocity has been varied in the range from 1000 to 4000. Vortex generators in the form of rectangular winglet pair (RWP) in common flow down configuration with an angle of attack equal to 35° are considered for the present study. Present study aims to investigate the effect of combination of finite height cylinder and RWP on heat transfer enhancement by varying location of RWP relative to center of the cylinder. To illustrate the behavior of flow field, streamlines plots have been used and are compared with heat transfer field by using temperature contours. Pressure loss and heat transfer enhancement are quantified in terms of friction factor and overall surface-averaged Nusselt number, respectively. The concept of secondary flow intensity has been used to estimate the relationship between heat transfer and secondary flow. Effect of RWP location on thermal performance factor has also been reported.
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- A :
-
Area of the heated surface
- C p :
-
Coefficient of pressure
- D :
-
Cylinder diameter
- f :
-
Friction factor
- H :
-
Cylinder height
- h :
-
Convective heat transfer coefficient
- h VG :
-
Height of vortex generator
- JF:
-
Thermal performance factor
- k :
-
Turbulent kinetic energy
- L 1 :
-
Length of computational domain
- L 2 :
-
Width of computational domain
- L 3 :
-
Height of computationaldomain
- l VG :
-
Length of vortex generator
- Nu :
-
Nusselt number
- P :
-
Non-dimensional pressure
- Re :
-
Reynolds number
- Se:
-
Secondary flow intensity
- T :
-
Temperature
- \(U_{\infty }\) :
-
Free stream velocity
- \(U_{j}\) :
-
Cartesian velocity component in \(X_{j}\)-coordinate direction
- \(X_{j}\) :
-
Non-dimensionalized Cartesian space coordinates in X, Y, Z direction
- X, Y, Z:
-
Non-dimensionalized Cartesian space coordinates
- \(\alpha_{\text{t}}\) :
-
Turbulent dynamic thermal diffusivity
- \(\beta\) :
-
Angle of attack of vortex generator
- \(\Delta X\) :
-
Streamwise center distance between tube and winglet
- \(\Delta Y\) :
-
Spanwise center distance between tube and winglet
- \(\varepsilon\) :
-
Dissipation rate
- \(\lambda\) :
-
Thermal conductivity
- \(\nu\) :
-
Kinematic viscosity of fluid
- \(\nu_{\text{t}}\) :
-
Turbulent kinematic viscosity of fluid
- \(\Omega\) :
-
Volume of the computational domain
- \(\omega^{\text{n}}\) :
-
Vorticity component normal to a cross section
- \(\rho\) :
-
Density of fluid
- \(\sigma_{k}\) :
-
Turbulent Prandtl numbers for k
- \(\sigma_{\varepsilon }\) :
-
Turbulent Prandtl numbers for \(\varepsilon\)
- \(\theta\) :
-
Non-dimensional temperature
- \(y^{ + }\) :
-
Wall y-plus
- b:
-
Bulk-mean value
- \(\infty\) :
-
Inlet
- local:
-
Local value
- n:
-
Normal direction
- o:
-
Absence of vortex generator
- w:
-
Wall
- AR:
-
Aspect ratio
- CFD:
-
Common flow down
- CFU:
-
Common flow up
- DWP:
-
Delta winglet pair
- FFR:
-
Friction factor ratio
- HTR:
-
Heat transfer ratio
- RWP:
-
Rectangular winglet pair
- SFIR:
-
Secondary flow intensity ratio
- VG:
-
Vortex generator
References
Ghisalberti, L., Kondjoyan, A.: Convective heat transfer coefficients between air flow and a short cylinder, Effect of air velocity and turbulence, Effect of body shape, dimensions and position in the flow. J. Food Eng. 42, 33–44 (1999)
Kawamura, T., Hiwada, M., Hibino, T., Mabuchi, T., Kumada, M.: Heat transfer from a finite circular cylinder on the flat plate. Bull. JSME 27, 2430–2439 (1984)
Giordano, R., Ianiro, A., Astarita, T., Carlomagno, G.M.: Flow field and heat transfer on the base surface of a finite circular cylinder in crossflow. Appl. Therm. Eng. 49, 79–88 (2012)
Tsutsui, T., Igarashi, T., Nakamura, H.: Fluid flow and heat transfer around a cylindrical protuberance mounted on a flat plate boundary layer. JSME Int. J. 43, 279–287 (2000)
Tsutsui, T., Kawahara, M.: Heat transfer around a cylindrical protuberance mounted in a plane turbulent boundary layer. ASME J. Heat Transf. 128, 153–161 (2006)
Naik, H., Tiwari, S.: Heat transfer and fluid flow characteristics from finite height circular cylinder mounted on horizontal plate. Procedia Eng. 127, 71–78 (2015)
Naik, H., Tiwari, S.: Three-dimensional flow characteristics near a circular cylinder mounted on horizontal plate at low Reynolds number. Prog. Comput. Fluid Dyn. 17, 102–113 (2017)
Sahin, B., Ozturk, N.A., Gurlek, C.: Horseshoe vortex studies in the passage of a model plate-fin-and-tube heat exchanger. Int. J. Heat Fluid Flow 29, 340–351 (2008)
Rostamy, N., Sumner, D., Bergstrom, D.J., Bugg, J.D.: Local flow field of a surface-mounted finite circular cylinder. J. Fluids Struct. 34, 105–122 (2012)
Sumner, D.: Flow above the free end of a surface-mounted finite-height circular cylinder: a review. J. Fluids Struct. 43, 41–63 (2013)
Schubauer, G.B., Spangenberg, W.G.: Forced mixing in boundary layers. J. Fluid Mech. 8, 10–32 (1960)
Jacobi, A.M., Shah, R.K.: Heat transfer surface enhancement through the use of longitudinal vortices: a review of recent progress. Exp. Thermal Fluid Sci. 11, 295–309 (1995)
Fiebig, M., Kallweit, P., Mitra, N.K., Tigglebeck, S.: Heat transfer enhancement and drag by longitudinal vortex generators in channel flow. Exp. Thermal Fluid Sci. 4, 103–114 (1991)
Tiggelbeck, S., Mitra, N.K., Fiebig, M.: Comparison of wing-type vortex generators for heat transfer enhancement in channel flows. J. Heat Transf. 116, 880–885 (1994)
Fiebig, M.: Vortex generators for compact heat exchangers. J. Enhanced Heat Transf. 2, 43–61 (1995)
Tian, L.T., He, Y.L., Lei, Y.G., Tao, W.Q.: Numerical study of fluid flow and heat transfer in a flat-plate channel with longitudinal vortex generators by applying field synergy principle analysis. Int. Commun. Heat Mass Transf. 36, 111–120 (2009)
Wu, J.M., Tao, W.Q.: Numerical study on laminar convection heat transfer in a channel with longitudinal vortex generator part B: parametric study of major influence factors. Int. J. Heat Mass Transf. 51, 3683–3692 (2008)
Naik, H., Tiwari, S.: Effect of rectangular winglet pair in common flow down configuration on heat transfer from an isothermally heated plate. Heat Transf. Eng. (2017). https://doi.org/10.1080/01457632.2017.1388946
Shih, T.H., Liou, W.W., Shabbir, A., Yang, Z., Zhu, J.: A new eddy viscosity model for high Reynolds number turbulent flows. Comput. Fluids 24, 227–238 (1995)
Min, C., Qi, C., Wang, E., Tian, L., Qin, Y.: Numerical investigation of turbulent flow and heat transfer in a channel with novel longitudinal vortex generators. Int. J. Heat Mass Transf. 55, 7268–7277 (2012)
Song, K.W., Wang, L.B.: The effectiveness of secondary flow produced by vortex generators mounted on both surfaces of the fin to enhance heat transfer in a flat tube bank fin heat exchanger. J. Heat Transf. 135, 041902-1–041902-11 (2013)
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Naik, H., Tiwari, S. (2019). Flow and Heat Transfer Characteristics of Surface-Mounted Cylinder in Presence of Rectangular Winglet Pair. In: Sahoo, P., Davim, J. (eds) Advances in Materials, Mechanical and Industrial Engineering. INCOM 2018. Lecture Notes on Multidisciplinary Industrial Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-96968-8_29
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DOI: https://doi.org/10.1007/978-3-319-96968-8_29
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