THERMAL SCIENCE

International Scientific Journal

Eshan Mohseni-Languri

,

Mofid Gorji-Bandpy

,

Reza Masoodi

A NUMERICAL STUDY OF FLOW AND TEMPERATURE FIELDS IN CIRCULAR TUBE HEAT EXCHANGER WITH ELLIPTIC VORTEX GENERATORS

ABSTRACT
The two-dimensional fluid flow and heat transfer in a circular tube heat exchanger with two elliptic obstacles at the back is studied numerically. The computational domain consists of a circular tube and two elliptic obstacles that are situated after the tube, such that the angle between their centerlines and the direction of free coming flow is 45 degrees. The numerical solution is achieved by numerical integration of full Navier-Stokes and energy equations over the computational domain, using finite volume method. The fluid flow is assumed to be laminar, incompressible and steady-state with constant thermo-physical characteristics. In this study major thermo-fluid parameters such as temperature, pressure and velocity fields as well as Nusselt number and friction factor variations are computed and some results are presented in the graphs. It is shown that using of elliptic obstacles leads to an increase in the average Nusselt number and also pressure. .
KEYWORDS
numerical computations, fluid flow, heat transfer, elliptic vortex generator, heat exchanger
PAPER SUBMITTED: 2006-08-04
PAPER REVISED: 2007-11-17
PAPER ACCEPTED: 2008-02-22
DOI REFERENCE: https://doi.org/10.2298/TSCI0802129M
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2008, VOLUME 12, ISSUE Issue 2, PAGES [129 - 136]
REFERENCES
  1. Sparrow, E. M., Liu, C. H., Heat Transfer Pressure Drop and Performance Relation ships for in-Line, Staggered and Continuous Plate Heat Exchangers, International Journal of Heat and Mass Transfer, 22 (1979), 12, pp. 1613-1626
  2. Kundu, D., Haji-Sheik, A., Lou, D. Y. S., Pressure and Heat Transfer in Cross Flow Over Cylinders between Two Parallel Plates, International Journal of Heat and Mass Transfer, 19 (1991), 3, pp. 345-360
  3. Buyruk, E., Johnson, B. W., Owen. I, Numerical and Experimental Study of Flow and Heat Transfer around a Tube in Cross-Flow at Low Reynolds Number, International Journal of Heat and Fluid Flow, 34 (1998), 3, pp. 223-232
  4. Alessio, S. J. D., Dennis, S. C. R., Steady Laminar Forced Convection from an Elliptic Cylinder, Engineering Mathematics J., 29 (1995), 2, pp. 181-193
  5. Kashevarov, A. V., Exact Solution of the Problem of Convective Heat Transfer for an Elliptic Cylinder and a Plate in a Fluid with Small Prandtl Number, Fluid Dynamics, 31 (1996), 3, pp. 356-360
  6. Badr, H. M., Forced Convection from a Straight Elliptical Tube, International Journal of Heat and Mass Transfer, 34 (1998), 2-3, pp. 229-236
  7. Sheng Leu, J., Hao Wu, Y., Yuh Jang, J., Heat Transfer and Fluid Flow Analysis in Plate-Fin and Tube Heat Exchangers with a Pair of Block Shape Vortex Generators, International Journal of Heat and Mass Transfer, 47 (2004), 19-20, pp. 4327-4338
  8. Kwak, K. M., Torii, K., Nishino, K., Simultaneous Heat Transfer Enhancement and Pressure Loss Reduction for Finned-Tube Bundles with the First or Two Transverse Rows of Built-in Winglets, Experimental Thermal and Fluid Science, 29 (2005), 5, pp. 625-632
  9. Torii, K., Keak, K. M., Nishino, K., Heat Transfer Enhancement Accompanying Pressure-Loss Reduction with Winglet-Type Vortex Generators for Fin-Tube Heat Exchangers, International Journal of Heat and Mass Transfer, 45 (2002), 18, pp. 3795-3801
  10. Knaus, H., Maier, J., Schnell, U., Hein, K. R. G., Advantages of Applying Boundary-Fit ted Grids to the Simulation of Pulverized Coal-Fired Utility Boilers with Mixed Staging Burners, Institute for Process Engineering and Power Plant Technology (IVD), University of Stuttgart, Germany, 1995
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A numerical study of flow and temperature fields in circular tube heat exchanger with elliptic vortex generators

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence