Validation and comparison of 2D and 3D numerical simulations of flow in simplex nozzles

Mustafa Bal; Gökhan Kayansalçik; Özgür Ertunç; Yakup Erhan Böke

Validation and comparison of 2D and 3D numerical simulations of flow in simplex nozzles

Mustafa Bal^*, Gökhan Kayansalçik, Özgür Ertunç, Yakup Erhan Böke

^*Corresponding author for this work

Department of Mechanical Engineering

Research output: Contribution to conference › Paper › peer-review

Abstract

Numerical simulations of pressure swirl atomizers are computationally expensive due to transient and multiphase flow behavior. In this study, 2D and 3D VOF simulations are performed for a geomerty which has high swirl chamber length-to-diameter ratio of 1.33. discharge coefficient (CD) and spray angle values are compared to the experimental data. Moreover, a benchmark study is conducted between 2D and 3D methods in terms of accuracy, computational cost and flow variables such as orifice exit axial and tangential velocity. The simulations are performed using a hybrid RANS-LES approach, IDDES model. It is observed that 2D simulation has lower accuracy in the validation parameters such as discharge coefficient and spray angle as compared to the 3D simulation. The main reason for 2D simulation inaccuracy might be the tangential port inlet effects and wrong estimation of the loss of swirl inside the swirl chamber. On the other hand, 2D simulations have approximately 1000 times lower computational cost than 3D simulations.

Original language	English
Publication status	Published - 31 Aug 2021
Event	15th Triennial International Conference on Liquid Atomization and Spray Systems, ICLASS 2021 - Edinburgh, United Kingdom Duration: 29 Aug 2021 → 2 Sept 2021

Conference

Conference	15th Triennial International Conference on Liquid Atomization and Spray Systems, ICLASS 2021
Country/Territory	United Kingdom
City	Edinburgh
Period	29/08/21 → 2/09/21

Bibliographical note

Publisher Copyright:
© 2021 ICLASS 2021 - 15th Triennial International Conference on Liquid Atomization and Spray Systems. All Rights Reserved.

Funding

This study was carried out in the framework of a PhD thesis. Computational resources were supplied from Istanbul Technical University through BAP project ID number 42673 and National Center for High Performance Computing (UHEM). Moreover, the authors gratefully acknowledge the Scientific and Technological Research Council of Turkey (TÜBİTAK) and TEI for providing financial support to this research with the 118C053 project. Additionally, we would like to thank Hakan Çiçek for the support he has given at the nozzle modelling process.

Funders	Funder number
TEI	118C053
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu

Keywords

CFD
pressure-swirl
simplex
VOF

Cite this

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title = "Validation and comparison of 2D and 3D numerical simulations of flow in simplex nozzles",

abstract = "Numerical simulations of pressure swirl atomizers are computationally expensive due to transient and multiphase flow behavior. In this study, 2D and 3D VOF simulations are performed for a geomerty which has high swirl chamber length-to-diameter ratio of 1.33. discharge coefficient (CD) and spray angle values are compared to the experimental data. Moreover, a benchmark study is conducted between 2D and 3D methods in terms of accuracy, computational cost and flow variables such as orifice exit axial and tangential velocity. The simulations are performed using a hybrid RANS-LES approach, IDDES model. It is observed that 2D simulation has lower accuracy in the validation parameters such as discharge coefficient and spray angle as compared to the 3D simulation. The main reason for 2D simulation inaccuracy might be the tangential port inlet effects and wrong estimation of the loss of swirl inside the swirl chamber. On the other hand, 2D simulations have approximately 1000 times lower computational cost than 3D simulations.",

keywords = "CFD, pressure-swirl, simplex, VOF",

author = "Mustafa Bal and G{\"o}khan Kayansal{\c c}ik and {\"O}zg{\"u}r Ertun{\c c} and B{\"o}ke, {Yakup Erhan}",

note = "Publisher Copyright: {\textcopyright} 2021 ICLASS 2021 - 15th Triennial International Conference on Liquid Atomization and Spray Systems. All Rights Reserved.; 15th Triennial International Conference on Liquid Atomization and Spray Systems, ICLASS 2021 ; Conference date: 29-08-2021 Through 02-09-2021",

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TY - CONF

T1 - Validation and comparison of 2D and 3D numerical simulations of flow in simplex nozzles

AU - Bal, Mustafa

AU - Kayansalçik, Gökhan

AU - Ertunç, Özgür

AU - Böke, Yakup Erhan

PY - 2021/8/31

Y1 - 2021/8/31

N2 - Numerical simulations of pressure swirl atomizers are computationally expensive due to transient and multiphase flow behavior. In this study, 2D and 3D VOF simulations are performed for a geomerty which has high swirl chamber length-to-diameter ratio of 1.33. discharge coefficient (CD) and spray angle values are compared to the experimental data. Moreover, a benchmark study is conducted between 2D and 3D methods in terms of accuracy, computational cost and flow variables such as orifice exit axial and tangential velocity. The simulations are performed using a hybrid RANS-LES approach, IDDES model. It is observed that 2D simulation has lower accuracy in the validation parameters such as discharge coefficient and spray angle as compared to the 3D simulation. The main reason for 2D simulation inaccuracy might be the tangential port inlet effects and wrong estimation of the loss of swirl inside the swirl chamber. On the other hand, 2D simulations have approximately 1000 times lower computational cost than 3D simulations.

AB - Numerical simulations of pressure swirl atomizers are computationally expensive due to transient and multiphase flow behavior. In this study, 2D and 3D VOF simulations are performed for a geomerty which has high swirl chamber length-to-diameter ratio of 1.33. discharge coefficient (CD) and spray angle values are compared to the experimental data. Moreover, a benchmark study is conducted between 2D and 3D methods in terms of accuracy, computational cost and flow variables such as orifice exit axial and tangential velocity. The simulations are performed using a hybrid RANS-LES approach, IDDES model. It is observed that 2D simulation has lower accuracy in the validation parameters such as discharge coefficient and spray angle as compared to the 3D simulation. The main reason for 2D simulation inaccuracy might be the tangential port inlet effects and wrong estimation of the loss of swirl inside the swirl chamber. On the other hand, 2D simulations have approximately 1000 times lower computational cost than 3D simulations.

KW - CFD

KW - pressure-swirl

KW - simplex

KW - VOF

UR - http://www.scopus.com/inward/record.url?scp=85180738461&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85180738461

T2 - 15th Triennial International Conference on Liquid Atomization and Spray Systems, ICLASS 2021

Y2 - 29 August 2021 through 2 September 2021

ER -

Validation and comparison of 2D and 3D numerical simulations of flow in simplex nozzles

Abstract

Conference

Bibliographical note

Funding

Keywords

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Cite this