Numerical solution of staggered circular tubes in two-dimensional laminar forced convection

Marchi, Carlos Henrique; Hobmeir, Maykel Alexandre

doi:10.1590/s1678-58782007000100007

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…In the design of HEs, the significance of heat transfer and fluid flow through tube banks is well-known. Extensive experimental [13][14][15][16][17] and numerical investigations [6,[18][19][20][21], both experimental and numerical [22][23][24][25], have previously been conducted on circular tube banks. The numerical study of laminar forced convection in a two-dimensional steady state in a circular cylinder bank with square and non-squareline configurations.…”

Section: Background Of Tbhementioning

confidence: 99%

Aheat transfer and fluid flow characteristics in a TBHE based on constructal design : An overview

H. Ahmed,

H. Zaidan,

S.M. Al-Jethelah

2023

NTU-JRE

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With the beginning of the industrial revolution in the eighteenth century, ICE, refrigeration equipment and power stations developed. All of the above devices use TBHE. The important thing is the recent increase in energy demand, which led researchers to find optimal solutions to save the largest amount of energy. The objective of this review can be summarized in the research published in the field of TBHE of all kinds. In order to improve the performance of the TBHE, two basic conditions must be met, the first is to increase the CHTC, and the second is to reduce the PD across the HE. In order to reach this goal, many influential variables must be studied, including pipe diameters and shapes, vertical and horizontal distances, fins shape, and installation method. In addition to the arrangement of the tubes through the TBHE. It was in the form of IL or staggered, the type of flow that was stratified or turbulent. The most important variables affecting on the performance of HEs can be summarized in general. The shape of the pipes had a greater urgency in the process, as the flat pipes had better performance than the circular TBHE. Both the PD and the CHTC are a function of the Reynolds number, as both increase with the increase in the Reynolds number. Therefore, studies in this field must be intensified to obtain the optimal design TBHE, taking into account all the above variables.

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Section: Background Of Tbhementioning

confidence: 99%

Aheat transfer and fluid flow characteristics in a TBHE based on constructal design : An overview

H. Ahmed,

H. Zaidan,

S.M. Al-Jethelah

2023

NTU-JRE

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“…Heat exchangers with tube banks in cross-flow are of great practical interest in many thermal and chemical engineering processes (Buyruk, 2002;Mandhani, Chhabra, & Eswaran, 2002;Incropera, Dewitt, Bergman, & Lavine, 2007;Liang & Papadakis, 2007;Al-Doori, 2011;Syam Sundar & Sharma, 2011;Naga Sarada, Sita Rama Raju, Kalyani Radha, & Syam Sunder, 2012). There have been several twodimensional numerical studies of pressure drop, heat transfer, and incompressible laminar flow for staggered tube arrays in cross-flow (Yuan, Tao, & Wang, 1998;Rahmani, Mirzaee, & Shirvani, 2005;Khan, Culham, & Yovanovich, 2006;Marchi & Hobmeir, 2007). A low Reynolds number and a Prandtl number equal to 0.71 have been considered in general (Chang, Beris, & Michaelides, 1989;Wang & Georgiadis, 1996).…”

Section: Introductionmentioning

confidence: 99%

Laminar Forced Convection Heat Transfer over Staggered Circular Tube Banks: A CFD Approach

Ishak¹,

Tahseen²,

Rahman³

2013

J MECH ENG SCI

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This paper presents the numerical study of two-dimensional forced convection heat transfer for staggered tube banks in cross flow under incompressible, steady-state conditions. This system is solved for body-fitted coordinates using the finite volume method for flow over a bundle of cylindrical tubes. A constant heat flux is imposed on the surface of the tubes as the thermal boundary condition. The type of arrangement considered is a set of staggered tubes. Ratios of longitudinal pitch to tube diameter (S T /D) of 1.25, 1.5, and 2 are considered. Reynolds numbers are varied from 25 to 250 and the Prandtl number is taken as 0.71. Velocity field vectors, temperature contours, and the local and average Nusselt numbers are analyzed in this paper. It can be seen that the predicted results are in good agreement with experimental and numerical results obtained previously. The obtained results show that the heat transfer rate increases with a reduction in the step of the longitudinal tube diameter. The local heat transfer depends strongly on the Reynolds number. The highest values are obtained at the surface opposite to the direction of flow. The heat transfer rate is insignificant in the areas of recycling.

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“…The importance of heat transfer and fluid flow appearance over tube banks in the design of heat exchangers is well known. Comprehensive experimental (Zukauskas, 1972), numerical (Jayavel & Tiwari, 2009;Marchi & Hobmeir, 2007;Rahmani, Mirzaee, & Shirvani, 2005;Wang, Penner, & Ormiston, 2000;Wilson & Bassiouny, 2000), and experimental and numerical studies (Matos, Vargas, Laursen, & Bejan, 2004;Sumner, 2010;Rosdzimin, Zuhairi, & Azwadi, 2010) on circular tube banks have been previously conducted. Based on previous studies published in the literature, one can infer from this that the form of a tube and its arrangement has a significant effect on heat transfer (Fowler & Bejan, 1994;Mandhani, Chhabra, & Eswaran, 2002;Vijaya Lakshmi, Subrahmanyam, Dharma Rao, & Sharma, 2011;Suryanarayana, Srinivasa Rao, Reddy Prasad, Sharma, & Sarma,, 2011).…”

Section: Introductionmentioning

confidence: 99%

A Numerical Study of Forced Convection Heat Transfer over a Series of Flat Tubes between Parallel Plates

Tahseen¹,

Ishak²,

Rahman³

2012

J MECH ENG SCI

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This paper presents the numerical study on two-dimensional forced convection heat transfer across three in-line flat tubes confined in a channel under incompressible, steady-state conditions. This system is solved in body-fitted coordinates (BFC) using the finite volume method (FVM). The constant heat flux is imposed on the surface of the tubes as the thermal boundary conditions. The range of the longitudinal pitch-todiameter ratio (S L /D s ) of 2.0-4.0 is considered, the Reynolds number varies within the range 25-300, and the Prandtl number is taken as 0.7. The temperature contours, local Nusselt number distributions at the tube surface and mean Nusselt number were analyzed. The strength of the heat transfer between the surface of the tubes and the air flow increases with an increase in Reynolds number and pitch-to-diameter ratio.

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Numerical solution of staggered circular tubes in two-dimensional laminar forced convection

Cited by 7 publications

References 13 publications

Aheat transfer and fluid flow characteristics in a TBHE based on constructal design : An overview

Aheat transfer and fluid flow characteristics in a TBHE based on constructal design : An overview

Laminar Forced Convection Heat Transfer over Staggered Circular Tube Banks: A CFD Approach

A Numerical Study of Forced Convection Heat Transfer over a Series of Flat Tubes between Parallel Plates

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