Numerical algorithm for fluid–solid coupling in reciprocating rod seals

By analyzing the principle of pressure balance in the sealing area, a more stable and faster convergence fluid–solid coupling numerical algorithm is proposed. The overall flexibility matrix of fluid film and asperities is extracted from both fluid and contact mechanics analyses. Then, multiplying th...

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Veröffentlicht in:Tribology international Jg. 143; S. 106078
Hauptverfasser: Xiang, Chong, Guo, Fei, Liu, Xiang, Chen, Yijie, Jia, Xiaohong, Wang, Yuming
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Kidlington Elsevier Ltd 01.03.2020
Elsevier BV
Schlagworte:
Algorithms
Convergence
Coupling
Film thickness
Film thickness correction
Flexibility matrix
Fluid–solid coupling
Mathematical models
Numerical analysis
Reciprocating rod seals
Flexibility matrix
Fluid–solid coupling
Reciprocating rod seals
Film thickness correction
ISSN:0301-679X, 1879-2464
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Zusammenfassung:By analyzing the principle of pressure balance in the sealing area, a more stable and faster convergence fluid–solid coupling numerical algorithm is proposed. The overall flexibility matrix of fluid film and asperities is extracted from both fluid and contact mechanics analyses. Then, multiplying the flexibility matrix by the current unbalanced pressure yields the required film thickness correction. Through some example analysis, it can be found the present model can be set with a larger relaxation factor (0.1) or even do not need any relaxation, while conventional model usually need to sacrifice efficiency and choose a smaller relaxation factor (0.001) to achieve stable convergence, meaning that the stability of the present model can be ensured at a higher convergence rate. •The total flexibility matrix of the system is needed to modify the film thickness.•The present model do not need any relaxation.•The calculation process is more stable than traditional method.•The calculation time cost by the present model is much less.
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ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2019.106078