Abuhatira, A.

Salim, S.M.

Vorstius, J.B.

English

Primary and secondary flow in 90-degree pipe elbow with curvature radius ratio of Rc/D=2 and Reynolds Number = 60,000 is investigated using CFD to evaluate relative performance between RANS (standard k-ε and RSM) and LES turbulence approaches. The present numerical results are compared against both experimental data (Sudo et al., 1998)and numerical simulations(Kim et al., 2014). In previous publications, RANS and LES have been investigated separately for different flow regimes (based on different Reynolds numbers and curvature radius ratios). The current work aims to make direct comparison between the two different turbulence approaches against validation data and preliminary results are presented in the figure below. The results indicate that RSM predicts the flow regime sufficiently accurate and is less computationally expensive than LES. The computed flow field variables will be coupled to ANSYS Mechanical to model the structural response of the pipe and subsequently the induced vibration

University of Dundee Online Publications

                                                                    University of DundeeNumerical simulation of turbulent pipe flow with elbow bend: comparison betweenRANS and LESAbuhatira, A.; Salim, S.M.; Vorstius, J.B.Published in:32nd Scottish Fluid Mechanics Meeting (SFMM)Publication date:2019Licence:OtherDocument VersionPeer reviewed versionLink to publication in Discovery Research PortalCitation for published version (APA):Abuhatira, A., Salim, S. M., & Vorstius, J. B. (2019). Numerical simulation of turbulent pipe flow with elbow bend:comparison between RANS and LES. In 32nd Scottish Fluid Mechanics Meeting (SFMM): Book of Abstracts (pp.25-25). University of Dundee.General rightsCopyright and moral rights for the publications made accessible in Discovery Research Portal are retained by the authors and/or othercopyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated withthese rights. • Users may download and print one copy of any publication from Discovery Research Portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain. • You may freely distribute the URL identifying the publication in the public portal.Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediatelyand investigate your claim.Download date: 24. Apr. 2022Numerical Simulation of Turbulent Pipe Flow with Elbow Bend: Comparison between RANS and LES  A. Abuhatira, S.M. Salim and J.B. Vorstius Mechanical Engineering, School of Science and Engineering, University of Dundee  Primary and secondary flow in 90-degree pipe elbow with curvature radius ratio of Rc/D = 2 and Reynolds Number = 60,000 is investigated using CFD to evaluate relative performance between RANS (standard k-ε and RSM) and LES turbulence approaches. The present numerical results are compared against both experimental data (Sudo et al., 1998) and numerical simulations (Kim et al., 2014).  In previous publications, RANS and LES have been investigated separately for different flow regimes (based on different Reynolds numbers and curvature radius ratios). The current work aims to make direct comparison between the two different turbulence approaches against validation data and preliminary results are presented in the figure below.  The results indicate that RSM predicts the flow regime sufficiently accurate and is less computationally expensive than LES. The computed flow field variables will be coupled to ANSYS Mechanical to model the structural response of the pipe and subsequently the induced vibration.   KIM, J., et al. (2014) Characteristics of Secondary Flow Induced by 90-Degree Elbow in Turbulent Pipe Flow. Engineering Applications of Computational Fluid Mechanics, 8 (2), 229-239.  SUDO, K., et al. (1998) Experimental investigation on turbulent flow in a circular-sectioned 90-degree bend. Experimental Methods and their Applications to Fluid Flow, 25 (1), 42-49.  

Numerical simulation of turbulent pipe flow with elbow bend: comparison between RANS and LES

                                                                    University of DundeeNumerical simulation of turbulent pipe flow with elbow bend: comparison betweenRANS and LESAbuhatira, A.; Salim, S.M.; Vorstius, J.B.Published in:32nd Scottish Fluid Mechanics Meeting (SFMM)Publication date:2019Licence:OtherDocument VersionPeer reviewed versionLink to publication in Discovery Research PortalCitation for published version (APA):Abuhatira, A., Salim, S. M., & Vorstius, J. B. (2019). Numerical simulation of turbulent pipe flow with elbow bend:comparison between RANS and LES. In 32nd Scottish Fluid Mechanics Meeting (SFMM): Book of Abstracts (pp.25-25). University of Dundee.General rightsCopyright and moral rights for the publications made accessible in Discovery Research Portal are retained by the authors and/or othercopyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated withthese rights. • Users may download and print one copy of any publication from Discovery Research Portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain. • You may freely distribute the URL identifying the publication in the public portal.Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediatelyand investigate your claim.Download date: 17. Aug. 2023Numerical Simulation of Turbulent Pipe Flow with Elbow Bend: Comparison between RANS and LES  A. Abuhatira, S.M. Salim and J.B. Vorstius Mechanical Engineering, School of Science and Engineering, University of Dundee  Primary and secondary flow in 90-degree pipe elbow with curvature radius ratio of Rc/D = 2 and Reynolds Number = 60,000 is investigated using CFD to evaluate relative performance between RANS (standard k-ε and RSM) and LES turbulence approaches. The present numerical results are compared against both experimental data (Sudo et al., 1998) and numerical simulations (Kim et al., 2014).  In previous publications, RANS and LES have been investigated separately for different flow regimes (based on different Reynolds numbers and curvature radius ratios). The current work aims to make direct comparison between the two different turbulence approaches against validation data and preliminary results are presented in the figure below.  The results indicate that RSM predicts the flow regime sufficiently accurate and is less computationally expensive than LES. The computed flow field variables will be coupled to ANSYS Mechanical to model the structural response of the pipe and subsequently the induced vibration.   KIM, J., et al. (2014) Characteristics of Secondary Flow Induced by 90-Degree Elbow in Turbulent Pipe Flow. Engineering Applications of Computational Fluid Mechanics, 8 (2), 229-239.  SUDO, K., et al. (1998) Experimental investigation on turbulent flow in a circular-sectioned 90-degree bend. Experimental Methods and their Applications to Fluid Flow, 25 (1), 42-49.  

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Numerical simulation of turbulent pipe flow with elbow bend: comparison between RANS and LES

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