Influence of Inlet Boundary Conditions on the Prediction of Flow Field and Hemolysis in Blood Pumps Using Large-Eddy Simulation
Inlet boundary conditions (BC) are one of the uncertainties which may influence the prediction of flow field and hemolysis in blood pumps. This study investigated the influence of inlet BC, including the length of inlet pipe, type of inlet BC (mass flow rate or experimental velocity profile) and tur...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Bioengineering |
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| Online Access: | https://www.mdpi.com/2306-5354/10/2/274 |
| _version_ | 1827758567182041088 |
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| author | Wen-Jing Xiang Jia-Dong Huo Wei-Tao Wu Peng Wu |
| author_facet | Wen-Jing Xiang Jia-Dong Huo Wei-Tao Wu Peng Wu |
| author_sort | Wen-Jing Xiang |
| collection | DOAJ |
| description | Inlet boundary conditions (BC) are one of the uncertainties which may influence the prediction of flow field and hemolysis in blood pumps. This study investigated the influence of inlet BC, including the length of inlet pipe, type of inlet BC (mass flow rate or experimental velocity profile) and turbulent intensity (no perturbation, 5%, 10%, 20%) on the prediction of flow field and hemolysis of a benchmark centrifugal blood pump (the FDA blood pump) and a commercial axial blood pump (Heartmate II), using large-eddy simulation. The results show that the influence of boundary conditions on integral pump performance metrics, including pressure head and hemolysis, is negligible. The influence on local flow structures, such as velocity distributions, mainly existed in the inlet. For the centrifugal FDA blood pump, the influence of type of inlet BC and inlet position on velocity distributions can also be observed at the diffuser. Overall, the effects of position of inlet and type of inlet BC need to be considered if local flow structures are the focus, while the influence of turbulent intensity is negligible and need not be accounted for during numerical simulations of blood pumps. |
| first_indexed | 2024-03-11T09:08:12Z |
| format | Article |
| id | doaj.art-a3520fdadb1c46109ddc3a5b2d530058 |
| institution | Directory Open Access Journal |
| issn | 2306-5354 |
| language | English |
| last_indexed | 2024-03-11T09:08:12Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Bioengineering |
| spelling | doaj.art-a3520fdadb1c46109ddc3a5b2d5300582023-11-16T19:12:07ZengMDPI AGBioengineering2306-53542023-02-0110227410.3390/bioengineering10020274Influence of Inlet Boundary Conditions on the Prediction of Flow Field and Hemolysis in Blood Pumps Using Large-Eddy SimulationWen-Jing Xiang0Jia-Dong Huo1Wei-Tao Wu2Peng Wu3Artificial Organ Technology Laboratory, School of Mechanical and Electric Engineering, Soochow University, Suzhou 215000, ChinaArtificial Organ Technology Laboratory, School of Mechanical and Electric Engineering, Soochow University, Suzhou 215000, ChinaSchool of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210095, ChinaArtificial Organ Technology Laboratory, School of Mechanical and Electric Engineering, Soochow University, Suzhou 215000, ChinaInlet boundary conditions (BC) are one of the uncertainties which may influence the prediction of flow field and hemolysis in blood pumps. This study investigated the influence of inlet BC, including the length of inlet pipe, type of inlet BC (mass flow rate or experimental velocity profile) and turbulent intensity (no perturbation, 5%, 10%, 20%) on the prediction of flow field and hemolysis of a benchmark centrifugal blood pump (the FDA blood pump) and a commercial axial blood pump (Heartmate II), using large-eddy simulation. The results show that the influence of boundary conditions on integral pump performance metrics, including pressure head and hemolysis, is negligible. The influence on local flow structures, such as velocity distributions, mainly existed in the inlet. For the centrifugal FDA blood pump, the influence of type of inlet BC and inlet position on velocity distributions can also be observed at the diffuser. Overall, the effects of position of inlet and type of inlet BC need to be considered if local flow structures are the focus, while the influence of turbulent intensity is negligible and need not be accounted for during numerical simulations of blood pumps.https://www.mdpi.com/2306-5354/10/2/274blood pumpflow fieldhemolysisinlet boundary conditionturbulent intensityCFD |
| spellingShingle | Wen-Jing Xiang Jia-Dong Huo Wei-Tao Wu Peng Wu Influence of Inlet Boundary Conditions on the Prediction of Flow Field and Hemolysis in Blood Pumps Using Large-Eddy Simulation Bioengineering blood pump flow field hemolysis inlet boundary condition turbulent intensity CFD |
| title | Influence of Inlet Boundary Conditions on the Prediction of Flow Field and Hemolysis in Blood Pumps Using Large-Eddy Simulation |
| title_full | Influence of Inlet Boundary Conditions on the Prediction of Flow Field and Hemolysis in Blood Pumps Using Large-Eddy Simulation |
| title_fullStr | Influence of Inlet Boundary Conditions on the Prediction of Flow Field and Hemolysis in Blood Pumps Using Large-Eddy Simulation |
| title_full_unstemmed | Influence of Inlet Boundary Conditions on the Prediction of Flow Field and Hemolysis in Blood Pumps Using Large-Eddy Simulation |
| title_short | Influence of Inlet Boundary Conditions on the Prediction of Flow Field and Hemolysis in Blood Pumps Using Large-Eddy Simulation |
| title_sort | influence of inlet boundary conditions on the prediction of flow field and hemolysis in blood pumps using large eddy simulation |
| topic | blood pump flow field hemolysis inlet boundary condition turbulent intensity CFD |
| url | https://www.mdpi.com/2306-5354/10/2/274 |
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