Thermal-hydraulic characteristic of a novel wavy fin-and-circle tube heat exchanger with concave curved vortex generators

Song, KeWei; Hu, DongLiang; Zhang, Qiang; Zhang, Kun; Xiang, Wei; Wang, Liang-Bi

doi:10.1016/j.ijheatmasstransfer.2022.123023

Cited by 38 publications

(9 citation statements)

References 29 publications

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“…In the paper of Žkauskas [2] , Equation ( 4) has been proposed for calculating the Nusselt number in the shell-and-tube heat exchanger composed of several tubes. (14) According to Table 2 and Figure 5, which compare the obtained results, in each paper, it is observed that increasing the Reynolds number increases Nusselt number. Since Žkauskas [2] has conducted experimental work, the results of Žkauskas [2] are promising.…”

Section: Solution Validation Through Comparing Nusselt Numbers In The...mentioning

confidence: 71%

“…Žkauskas [2] Gholami et al [4] Present study Difference with Žkauskas [2] Difference with Gholami et al [4] Figure 5 presents the difference between the numerical solutions of the present study and those of Žkauskas [2] and Gholami et al [4] . All of these results are obtained from Equation (14). After comparison, the validity of the numerical solution can be ensured regarding the agreement between the results.…”

Section: Nusselt Numbermentioning

confidence: 99%

“…KW Song [14] studied the effect of the concave curved vortex generator pairs with different transverse locations and attack angles on the thermal-hydraulic characteristics of the heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on the Effect of Length and Amplitude of Sinusoidal Wavy Vortex Generators on the Heat Transfer Rate, Pressure Drop, and London Factor in Compact Heat Exchangers

Barati

Nimafar

Salehi

2023

j. of mech. mater. and mech. res.

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Compact heat exchangers (CHE) improve the heat transfer rate with lighter weight and lower volume than other counterparts. An important point in CHEs is their higher pressure drop relative to conventional heat exchangers. This study aims to investigate the heat transfer rate and pressure drop in some proposed models of these heat exchangers with/without vortex generators (VGs) in different cases. A hot fluid of temperature 350°C flowing through tubes and a cold fluid of temperature 300°C circulating inside the shell are assumed. To this end, several VGs with sinusoidal wavy shapes are designed and examined with different amplitudes of the sine wave and different lengths to determine the effects of these parameters on the heat transfer rate of tubes and pressure drop along the heat exchanger length. In the 2D steady-state laminar fluid flow, governing equations are discretized using the finite element method and analyzed for Reynolds numbers 400 to 1000 in the ANSYS software. Finally, with a 5.06% increase in the Nusselt number, the sinusoidal VGs of amplitude 1 and length 6 mm quantitatively indicated the best performance in terms of the heat transfer rate and pressure drop (London factor) among the studied cases.

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Section: Solution Validation Through Comparing Nusselt Numbers In The...mentioning

confidence: 71%

Section: Nusselt Numbermentioning

confidence: 99%

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Investigation on the Effect of Length and Amplitude of Sinusoidal Wavy Vortex Generators on the Heat Transfer Rate, Pressure Drop, and London Factor in Compact Heat Exchangers

Barati

Nimafar

Salehi

2023

j. of mech. mater. and mech. res.

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“…Shahsavar et al [29] explored the melting and solidification of thermal energy storage with wavy fins using numerical analysis. Song et al [30] investigated the energy transfer behaviour of a heat exchanger with two concave curved vortex generators placed next to a wavy fin. Tahrour et al [31] probed the effect of wave amplitude on the flow of wavy finned-tube heat exchangers.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the thermal analysis of a wavy fin with radiation impact: an application of extreme learning machine

Prakash,

Chandan,

Karthik

et al. 2023

Phys. Scr.

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The combined impact of radiation and convection on the heat transfer of a wavy fin is scrutinized in the present analysis. The novelty of this research work is that it proposes a deterministic machine learning model known as an extreme learning machine to address the heat transfer problem of a wavy fin. The effect of radiation on convective heat transfer and the Rosseland approximation for the radiation heat exchange have been considered in the investigation. The nonlinear ordinary differential equation (ODE) is converted to its nondimensional form using the appropriate dimensionless variables. Runge-Kutta-Fehlberg's fourth-fifth order technique (RKF 45) is used to solve the nondimensional ODE numerically. The roles of convection-conduction, radiation-conduction, thermal conductivity, and radiation parameters have been discussed for satisfying a prescribed temperature distribution in rectangular and wavy fins with graphical visualization. A rise in convection-conduction and radiation-conduction variables decreased the thermal distribution of both the wavy fin and rectangular fin. Further, ANSYS simulation analyzes the variation of temperature and total heat flux in both rectangular and wavy fins. The study demonstrates the effectiveness of the model selected through the obtained results, which indicate the potential of the regression model for providing an accurate prediction.

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“…Mehta et al (2022b) computationally analyzed the hydrothermal performance for flow through a ribbed wavy channel by varying the number of ribbed and their shape: rectangular, semi-circular and triangular and observed that the rectangular ribbed-wavy channel has a higher performance factor among all the configurations in the regime: 50 # Re # 125. Additionally, numerous recent research investigations relating to heat transfer enhancement have been conducted using the irregular geometries, such as the 60°C hevron plate heat exchanger (Singh and Ghosh, 2022), wavy porous layer (Ouni et al, 2022), wavy surface with finite wall thickness (Borah et al, 2022), wavy channel with linearly varying amplitude (Kumar et al, 2022a(Kumar et al, , 2022b and novel wavy fin-and-circle tube heat exchanger having concave curved vortex generators (Song et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Analysis of hydrothermal performance for laminar forced convective flow through a wavy channel with porous blocks

Mehta

Pati

2023

HFF

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Purpose The purpose of this paper is to investigate computationally the hydrothermal characteristics for forced convective laminar flow of water through a channel with a top wavy wall and a flat bottom wall having metallic porous blocks. Design/methodology/approach The governing equations are solved computationally using a finite element method–based numerical solver COMSOL Multiphysics® for the following range of parameters: 10 ≤ Reynolds number (Re) ≤ 500 and 10–4 ≤ Darcy number (Da) ≤ 10–1. Findings The presence of porous blocks significantly influences the heat transfer rate, and the value of local Nusselt number increases with the increase in Da. The value of the average Nusselt number decreases with Da for the top wall and the same is enhanced for the bottom wall of the wavy channel with porous blocks (WCPB). The value of the average Nusselt number for WCPB is significantly higher than that of the wavy channel without porous block (WCWPB), plane channel without porous block (PCWPB) and plane channel with the porous block (PCPB) at higher Re. For PCPB, the performance factor (PF) is always higher than that of WCWPB and WCPB for Da = 10–4 and Da = 10–3. Also, PF for WCPB is higher than that of WCWPB for higher Re except for Da = 10–4. Further, the value of for WCPB is higher than that of PCPB at Da = 10–2 and 10–1 at Re = 500. Practical implications The current study is useful in designing efficient heat exchangers for process plants, solar collectors and aerospace applications. Originality/value The analysis of thermo-hydraulic characteristics for laminar flow through a channel with a top wavy wall and a flat bottom wall having metallic porous blocks have been analyzed for the first time. Further, a comparative assessment of the performance has been performed with a wavy channel without a porous block, a plane channel without a porous block and a plane channel with porous blocks.

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Thermal-hydraulic characteristic of a novel wavy fin-and-circle tube heat exchanger with concave curved vortex generators

Cited by 38 publications

References 29 publications

Investigation on the Effect of Length and Amplitude of Sinusoidal Wavy Vortex Generators on the Heat Transfer Rate, Pressure Drop, and London Factor in Compact Heat Exchangers

Investigation on the Effect of Length and Amplitude of Sinusoidal Wavy Vortex Generators on the Heat Transfer Rate, Pressure Drop, and London Factor in Compact Heat Exchangers

Investigation of the thermal analysis of a wavy fin with radiation impact: an application of extreme learning machine

Analysis of hydrothermal performance for laminar forced convective flow through a wavy channel with porous blocks

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