Heat Transfer Predictions in Cross Flow Over Cylinders Between Two Parallel Plates

Kundu, Debashis; Haji‐Sheikh, A.; Lou, D. Y. S.

doi:10.1080/10407789108944855

Cited by 25 publications

(23 citation statements)

References 3 publications

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“…Fluid flow and heat transfer over a row of in-line cylinders placed between two parallel plates was studied numerically by Kundu et al [13]. They computed the flow field using a finite-difference method.…”

Section: Validationmentioning

confidence: 99%

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A Numerical Study of Fluid Flow and Heat Transfer over a Bank of Flat Tubes

Bahaidarah

Anand

Chen

2005

Numerical Heat Transfer, Part A: Applications

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The present study considers steady laminar two-dimensional incompressible flow over both in-line and staggered flat tube bundles used in heat exchanger applications. The effects of various independent parameters, such as Reynolds number (Re), Prandtl number (Pr), length ratio (L=Da), and height ratio (H=Da), on the pressure drop and heat transfer were studied. A finite-volume-based FORTRAN code was developed to solve the governing equations. In all, 10 modules were considered in this study. The flow is observed to attain a periodically fully developed condition downstream of the fourth module. The nondimensionalized pressure drop decreases monotonically with an increase in the Reynolds number. In general, the module average Nusselt number increases with an increase in the Reynolds number. The results at Pr ¼ 7.0 indicate a significant increase in the computed module average Nusselt number when compared to those for Pr ¼ 0.7. The overall performance of the in-line configuration for lower height ratio (H=Da ¼ 2) and higher length ratio (L=Da ¼ 6) is preferable since it provides higher heat transfer rate for all Reynolds numbers except for the lowest Re value of 25. As expected, the staggered configurations perform better than the in-line configuration from the heat transfer point of view. Also from the heat transfer point of view, equivalent circular tubes perform better than flat tube banks. However, the heat transfer performance ratio was always greater than 1, signifying that from the pressure-drop point of view the flat tube banks perform better than a tube bank with equivalent circular tubes.

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Section: Validationmentioning

confidence: 99%

“…Kundu [13,14] studied numerically the heat transfer and fluid flow over a row of in-line cylinders placed between two parallel plates. Incompressible, two-dimensional, and laminar flow were considered.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Study of Fluid Flow and Heat Transfer over a Bank of Flat Tubes

Bahaidarah

Anand

Chen

2005

Numerical Heat Transfer, Part A: Applications

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“…A number of studies (Eckels & Rabas, 1987;Syam Sundar, Sharma, & Parveen, 2009) have been conducted into the effect of fin spacing in the performance of fin tube heat exchangers provided test results for the investigation of the effect of fin spacing and fin length. Numerous studies have measured the heat transfer coefficient and pressure drop over an eight tube row in-lined tube array (Eckels & Rabas, 1987;Kundu, Haji-Sheikh, & Lou, 1991;Launder & Massey, 1978;Şahin et al, 2006;Tang, Min, Xie, & Wang, 2009) . The experimental data available up to 1994 has been reviewed in the book by Nakonieczny (2006).…”

Section: Introductionmentioning

confidence: 99%

“…Most of them concentrated on 2-D and laminar flow conditions ((Aslam Bhutta et al, 2012;Chen & Wung, 1989;Fujii, Fujii, & Nagata, 1984;Kundu et al, 1991;Launder & Massey, 1978;Tutar & Akkoca, 2004;Yuan, 2000)). Kundu et al (1991)reported 2-D numerical results comparing with experimental data to show the influence of fin spacing on the heat transfer and pressure drop over a four-row in-line cylinder between two parallel plates for 50 ≤ Re H ≤ 500. It was reported that 2-D flow modeling cannot sufficiently forecast heat transfer characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the complicated flow structure between the fins, 3-D numerical studies tend to be difficult. Few researchers have reported 3-D modeling for plain-fin configuration in their numerical studies (Aslam Bhutta et al, 2012;Chiu & Jang, 2009;Jang, Wu, & Chang, 1996;Junqi et al, 2007;Kundu et al, 1991;Şahin et al, 2006;Tutar & Akkoca, 2004). Most of these study has been conducted around the laminar to transitional flow range.…”

Section: Introductionmentioning

confidence: 99%

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Plate Fin and Tube Heat Exchanger Modeling: Effects of Performance Parameters for Turbulent Flow Regime

Amin¹,

Karim²,

Islam³

2014

Int J Automot Mech Eng

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In the current study, the air-side turbulent thermal and hydraulic characteristics of finned tube heat exchanger of staggered tube arrangement are simulated with steadystate solvers using ANSYS CFX12.0, a Commercial CFD code for turbulent flow regimes. The k-ω model was used to predict the turbulent flow characteristics through the finned tube heat exchanger. The level of confidence of this numerical model was based on a comparison with previous experimental data from the literature, comparing the friction factor f and Colburn factor j, and reasonable agreement is found between the simulations and experimental data. Detailed analysis of the effect of thermal and hydraulic performance of related parameters such as longitudinal pitch, transverse pitch, and fin pitch are also critically evaluated for turbulent flow regime. The increase in the longitudinal pitch and transverse pitch causes a decrease in the heat transfer and pressure drop performance as the flow becomes free and less compact with the increase in the tube pitch. The effect of fin pitch on the heat exchanger performance demonstrates that a decrease in the fin pitch shows the opposite performance to that of the longitudinal and transverse pitches.

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