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Wall‐resolved large eddy simulation of turbulent flows in helically ribbed steam cracker reactors

Yannan Wang (UGent) , Jens Dedeyne (UGent) , Laurien Vandewalle (UGent) and Kevin Van Geem (UGent)
(2023) AICHE JOURNAL. 69(3).
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Abstract
Helically ribbed coils are commonly applied in steam cracking furnaces. To fully understand the impact of these ribbed wall modifications on the local heat transfer and associated pressure drop throughout the reactor, detailed experimental, and numerical studies have been performed. Experimental data based on stereo-particle image velocimetry (S-PIV) and liquid crystal thermography have been used to validate the numerical results from wall-resolved large eddy simulations using OpenFOAM. The validation shows an excellent agreement in terms of mean and fluctuating velocities, pressure drop, and heat transfer behavior in a discontinuously ribbed tube. Compared with the pressure drop in a continuously ribbed tube, an approximately 40% lower pressure drop is obtained with a discontinuously ribbed tube, at the cost of a slightly decreased heat transfer enhancement. This makes the discontinuously ribbed tube design particularly interesting for steam cracking applications. The results also show that the nonuniform heat transfer at the wall is inherently linked to the flow reattachment and recirculation zones caused by the rib. Finally, the validated numerical model was used to study comparable designs and propose novel helical rib designs. Based on the results of the study, enlarging the trailing edge of the conventional ribbed geometry will improve the thermal enhancement performance, and is therefore found most promising for steam cracking reactor design.
Keywords
General Chemical Engineering, Environmental Engineering, Biotechnology, enhanced heat transfer, pressure drop, ribbed reactor design, steam cracking, wall-resolved large eddy simulation, HEAT-TRANSFER, COKE FORMATION, PRESSURE-DROP, TUBE, BEHAVIOR, CHANNEL, COKING, SCALE

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MLA
Wang, Yannan, et al. “Wall‐resolved Large Eddy Simulation of Turbulent Flows in Helically Ribbed Steam Cracker Reactors.” AICHE JOURNAL, vol. 69, no. 3, 2023, doi:10.1002/aic.17845.
APA
Wang, Y., Dedeyne, J., Vandewalle, L., & Van Geem, K. (2023). Wall‐resolved large eddy simulation of turbulent flows in helically ribbed steam cracker reactors. AICHE JOURNAL, 69(3). https://doi.org/10.1002/aic.17845
Chicago author-date
Wang, Yannan, Jens Dedeyne, Laurien Vandewalle, and Kevin Van Geem. 2023. “Wall‐resolved Large Eddy Simulation of Turbulent Flows in Helically Ribbed Steam Cracker Reactors.” AICHE JOURNAL 69 (3). https://doi.org/10.1002/aic.17845.
Chicago author-date (all authors)
Wang, Yannan, Jens Dedeyne, Laurien Vandewalle, and Kevin Van Geem. 2023. “Wall‐resolved Large Eddy Simulation of Turbulent Flows in Helically Ribbed Steam Cracker Reactors.” AICHE JOURNAL 69 (3). doi:10.1002/aic.17845.
Vancouver
1.
Wang Y, Dedeyne J, Vandewalle L, Van Geem K. Wall‐resolved large eddy simulation of turbulent flows in helically ribbed steam cracker reactors. AICHE JOURNAL. 2023;69(3).
IEEE
[1]
Y. Wang, J. Dedeyne, L. Vandewalle, and K. Van Geem, “Wall‐resolved large eddy simulation of turbulent flows in helically ribbed steam cracker reactors,” AICHE JOURNAL, vol. 69, no. 3, 2023.
@article{8770333,
  abstract     = {{Helically ribbed coils are commonly applied in steam cracking furnaces. To fully understand the impact of these ribbed wall modifications on the local heat transfer and associated pressure drop throughout the reactor, detailed experimental, and numerical studies have been performed. Experimental data based on stereo-particle image velocimetry (S-PIV) and liquid crystal thermography have been used to validate the numerical results from wall-resolved large eddy simulations using OpenFOAM. The validation shows an excellent agreement in terms of mean and fluctuating velocities, pressure drop, and heat transfer behavior in a discontinuously ribbed tube. Compared with the pressure drop in a continuously ribbed tube, an approximately 40% lower pressure drop is obtained with a discontinuously ribbed tube, at the cost of a slightly decreased heat transfer enhancement. This makes the discontinuously ribbed tube design particularly interesting for steam cracking applications. The results also show that the nonuniform heat transfer at the wall is inherently linked to the flow reattachment and recirculation zones caused by the rib. Finally, the validated numerical model was used to study comparable designs and propose novel helical rib designs. Based on the results of the study, enlarging the trailing edge of the conventional ribbed geometry will improve the thermal enhancement performance, and is therefore found most promising for steam cracking reactor design.}},
  articleno    = {{e17845}},
  author       = {{Wang, Yannan and Dedeyne, Jens and Vandewalle, Laurien and Van Geem, Kevin}},
  issn         = {{0001-1541}},
  journal      = {{AICHE JOURNAL}},
  keywords     = {{General Chemical Engineering,Environmental Engineering,Biotechnology,enhanced heat transfer,pressure drop,ribbed reactor design,steam cracking,wall-resolved large eddy simulation,HEAT-TRANSFER,COKE FORMATION,PRESSURE-DROP,TUBE,BEHAVIOR,CHANNEL,COKING,SCALE}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{13}},
  title        = {{Wall‐resolved large eddy simulation of turbulent flows in helically ribbed steam cracker reactors}},
  url          = {{http://doi.org/10.1002/aic.17845}},
  volume       = {{69}},
  year         = {{2023}},
}
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