Heat transfer simulation of annular elliptical fin-and-tube heat exchanger by transition SST model

Nemati, H.; Rahimzadeh, Ali; Wang, Chi-chuan

doi:10.1007/s11771-020-4452-5

Cited by 14 publications

(6 citation statements)

References 27 publications

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“…For the turbulent flow, its simulation in the latter study was achieved via the use of a transition SST model. Also, the investigation focused on the impact posed by parameters such as fin densities, horizontal to vertical fin diameter ratios, and air velocities (Nemati et al, 2020). In the results, the study demonstrated that for heat transfer coefficient and pressure drop, between the simulations and the proposed correlations, the maximum deviations entailed 3.2% and 5.6%, respectively.…”

Section: Introductionmentioning

confidence: 95%

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Experimental and numerical investigation on convective heat transfer in actively heated bundle-pipe

Karar

Emani

Gounder

et al. 2021

Engineering Applications of Computational Fluid Mechanics

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The present work investigates heat transfer through natural convection using a series of experiments and computational modeling using Computational Fluid Dynamics (CFD) simulations in a one-meter bundle pipe with three internal pipes. The exact complex geometry is modeled where the flow channel is reduced through a spiral groove attached to a rod inside the internal tubes which was challenging compared to the flow in circular pipes in previous studies. To support the computational modeling investigations, convective heat transfer analysis is also studied through experiments with water as the production and heating fluids. Further, simulations are carried out with water-crude oil and aqueous ethylene glycol-water as the heating mediums and production fluids, respectively. Based on the heat transfer rates estimated from experimental data and CFD simulation results for the respective tubes, a modification to an existing Nusselt number is proposed for the range of temperature and flow rates used in the experiments. The proposed model, Nu i = Pr i m Ra i n , was validated against experimental data and a good agreement with R 2 values of more than 0.94 was achieved.

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Section: Introductionmentioning

confidence: 95%

“…About the annular elliptical fin-and-tube heat exchanger, detailed numerical investigations have strived to give insight into the heat exchanger systems' thermo-fluid characteristics (Nemati et al, 2020). For the turbulent flow, its simulation in the latter study was achieved via the use of a transition SST model.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation on convective heat transfer in actively heated bundle-pipe

Karar

Emani

Gounder

et al. 2021

Engineering Applications of Computational Fluid Mechanics

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“…Elliptical and circular fins were analysed for their thermal and hydraulic properties [81]. The turbulent flow was simulated using transition SST.…”

Section: Numerical Studiesmentioning

confidence: 99%

A review on the modification of circular fin and tube heat exchangers through new innovative fin shapes

2022

IJATEE

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Heat exchanger tubes with circular fins have been widely used in industrial and commercial applications over the past decade and are considered one of the major researcher's concerns in a range of engineering applications for their affordable cost and potential future to improve heat transfer. This review summarises the recently optimised circular fins (needle, trimmed, crimped, perforated) and how they affect heat transmission, the pressure generated and weight. Where varying fin-related parameters (fin height, fin material, the gap between fins, and number of fins) and flow-related parameters (inlet air velocity or manufacturing fin design) are aimed to optimise the performance in a different manner.In conclusion, designs of novel fin shapes remained a challenging field and demanded more studies to reinforce the existing papers to accomplish the optimum required performance.

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“…They analyzed the influence of axial ratio and angle of attack of elliptical fins on the performance of heat exchangers. Nemati et al [8] also conducted a detailed numerical study on elliptical annular finned tubes. Wavy fin was another type of fin.…”

Section: Introductionmentioning

confidence: 99%

A numerical study on the thermal hydraulic performance of finned elliptical tube with wet air flowing around

Dong,

Zhang

2023

J. Phys.: Conf. Ser.

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Energy conservation is a key concern for countries around the world. Enhanced heat exchange is one of the important ways to save energy. The heat transfer process of wet gas is a special heat transfer process, accompanied by a mass transfer phenomenon. Improving the thermal hydraulic performance of wet gas can greatly improve the energy utilization rate. The thermal hydraulic characteristic of finned elliptical tubes with different elliptical axis ratios (0.9 to 0.5) was numerically studied under wet air conditions. Chilton & Colburn factor was chosen as assessment parameters for the thermal performance. The mass transfer effect was characterized by a dehumidifying coefficient. The flow resistance coefficient was adopted to judge the flow characteristic and the London area goodness factor was evaluated for the overall performance. The simulations indicated the superior performance of the finned elliptical tube, j factor of the finned elliptical tube was greater and the flow resistance coefficient was less than that of the finned circular tube. Comparison between different finned elliptical tubes showed that the JF factor increased with the decrease of the elliptical axis ratio. Under the same inlet conditions, the JF factor increases by approximately 50% as the elliptical axis ratio changed from 1 to 0.5.

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Heat transfer simulation of annular elliptical fin-and-tube heat exchanger by transition SST model

Cited by 14 publications

References 27 publications

Experimental and numerical investigation on convective heat transfer in actively heated bundle-pipe

Experimental and numerical investigation on convective heat transfer in actively heated bundle-pipe

A review on the modification of circular fin and tube heat exchangers through new innovative fin shapes

A numerical study on the thermal hydraulic performance of finned elliptical tube with wet air flowing around

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