## THERMAL SCIENCE

International Scientific Journal

### CONVECTIVE COOLING OF TANDEM HEATED TRIANGULAR CYLINDERS PLACED IN A CHANNEL

**ABSTRACT**

Numerical simulations of forced convective incompressible flow in a horizontal plane channel with adiabatic walls over two isothermal tandem triangular cylinders of equal size are presented to investigate the effect of wall proximity of obstacles, gap space (i.e. gap between two squares), and Reynolds number. Computations have been carried out for Reynolds numbers of (based on triangle width) 100, 250, and 350. Results show that, wall proximity has different effect on first and second triangle in fluid characteristics especially in lower gap spaced, while for heat transfer a fairly same behavior was seen.

**KEYWORDS**

PAPER SUBMITTED: 2009-01-12

PAPER REVISED: 2009-02-28

PAPER ACCEPTED: 2009-03-04

**THERMAL SCIENCE** YEAR

**2010**, VOLUME

**14**, ISSUE

**Issue 1**, PAGES [183 - 197]

- Alonso, G., Meseguer, J., A Parametric Study of the Galloping Stability of Two-Dimensional Triangular Cross-Section Bodies, J. Wind Eng. Ind. Aerodyn, 94 (2006), 4, pp. 241-253
- Buresti, G., Lombardi, G., Talamelli, A., Low Aspect-Ratio Triangular Prisms in Cross-Flow: Measurements of The Wake Fluctuating Velocity Field, J. Wind Eng. Ind. Aerodyn., 74-76 (1998), April, pp. 463-473
- Csiba, A. L., Martinuzzi, R. J., Investigation of Bluff Body Asymmetry on The Properties of Vortex Shedding, J. Wind Eng. Ind. Aerodyn., 96 (2008), 6-7, pp. 1152-1163
- Ulrichs, E., Herwig, H., Between Two Limits: Flow Separation Behind a Bluff body Close to a Wall, Forschung im Ingenieurwesen, 68 (2003), 1, pp. 36-38
- Camarri, S., Salvetti, M. V., Buresti, G., Large-Eddy Simulation of the Flow Around a Triangular Prism with Moderate Aspect Ratio, J. Wind Eng. Ind. Aerodyn, 94 (2006), 5, pp. 309-322
- Abbassi, H., Turki, S., Ben Nasrallah, S., Numerical Investigation of Forced Convection in a Horizontal Channel with a Built-in Triangular Prism, Int. J. Thermal Science, 40 (2001), 7, pp. 649-658
- Chattopadhyay, H., Augmentation of Heat Transfer in a Channel Using a Triangular Prism, Int. J. Thermal Sciences, 46 (2007), 5, pp. 501-505
- Martinuzzi, R. J., Bailey, S. C. C., Kopp, G. A., Influence of Wall Proximity on Vortex Shedding from a Square Cylinder, Experiments in Fluids, 34 (2003), 5, pp. 585-596
- Bailey, S. C. C., Martinuzzi, R. J., Kopp, G. A., The Effects of Wall Proximity on Vortex Shedding from a Square Cylinder: Three Dimensional Effects, Physic of Fluids, 14 (2002), 12, pp. 4160-177
- Bosch, G., Kappler, M., Rodi, V., Experiments on the Flow Past a Square Cylinder Placed Near a Wall, Exp. Thermal Fluid Science, 13 (1996), 3, pp. 292-305
- Chakrabarty, D., Brahma, R., Effect of Wall Proximity in Fluid Flow and Heat Transfer from a Square Prism Placed Inside a Wind Tunnel, Thermal Science, 11 (2007), 4, pp. 65-78
- Singha, A. K., Sarkar, A., De, P. K., Numerical Study on Heat Transfer and Fluid Flow Past a Circular Cylinder in the Vicinity of a Plane Wall, Numerical Heat Transfer, PartA, 53 (2008), 6, pp. 641-666
- Rosales, J. L, Ortega, A., Humphrey, J. A. C., A Numerical Simulation of the Convective Heat Transfer in Confined Channel Flow Past Square Cylinders: Comparison of Inline and Offset Tandem Pairs, Int. J. Heat Mass Transfer, 44 (2001), 3, pp. 587-603
- Valencia, A., Numerical Study of Self-Sustained Oscillatory Flows and Heat Transfer in Channels with a Tandem of Transverse Vortex Generators, Heat and Mass,Transfer, 33 (1998), 5, pp. 465-470
- Farhadi, M.,Sedighi, K., Madani, M. M., Convective Cooling of Tandem Heated Squares in a Channel, Proc. IMechE Part C: J. Mechanical Engineering Science, 223 (2009), 4, pp. 965-978
- Farhadi, M., Sedighi, K., Madani, M. M., Convective Cooling of Tandem Heated Squares in a Channel. Proceedings, 3rd BSME-ASME International Conference on Thermal Engineering, 2006, Dhaka, Bangladesh
- Etminan, E., Sohankar, A., Numerical Simulation of Flow around of Two Tandem Squares, Proceedings, 10th Annual Conference of Fluid Dynamic, Yazd, Iran, 2006
- Sumner, D., Richards, M. D., Akosile, O. O., Two Staggered Circular Cylinders of Equal Diameter in Cross-Flow, Fluids and Structures, 20 (2005), 2, pp. 255-276
- Zdravkovich, M. M., Flow Around Circular Cylinders, Vol. 1: Fundamentals, Oxford University Press, Oxford, UK, 1997
- Kostic, Z., Oka, S., Fluid Flow and Heat Transfer with Two Cylinders in Cross Flow, Int. J. Heat and Mass Transfer, 15 (1972), 2, pp. 279-299
- Akbari1, M. H., Price, S. J., Numerical Investigation of Flow Patterns for Staggered Cylinder Pairs in Cross-Flow, Fluids and Structures, 20 (2005), 4, pp. 533-554
- Buyruk, E., Numerical Study of Heat Transfer Characteristic on Tandem Cylinder, Inline and Staggered Tube Bank in Cross Flow of Aair, Int. Comm. Heat Mass Transfer, 29 (2002), 3, pp. 355-366
- Nourollahi, M., Generation of CFD Code for Solving the Fluid Governing Equations in Non-Orthogonal Coordinate Systems, M. Sc. thesis, Faculty of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran, 2007
- Ferziger, J. H., Peric, M., Computational Methods for Fluid Dynamics. Springer-Verlag, Berlin Heidelberg, New York, 2002