Inferring cryogenic cavitation features from the boundary conditions (BCs) remains a challenge due to the nonlinear thermal effects. This paper aims to build a fast model for cryogenic cavitation prediction from the BCs. Different from the traditional numerical solvers and conventional physics-informed neural networks, the approach can realize near real-time inference as the BCs change without a recalculating or retraining process. The model is based on the fusion of simple theories and neural network. It utilizes theories such as the B-factor theory to construct a physical module, quickly inferring hidden physical features from the BCs. These features represent the local and global cavitation intensity and thermal effect, which are treated as functions of location x. Then, a neural operator builds the mapping between these features and target functions (local pressure coefficient or temperature depression). The model is trained and validated based on the experimental measurements by Hord for liquid nitrogen and hydrogen. Effects of the physical module and training dataset size are investigated in terms of prediction errors. It is validated that the model can learn hidden knowledge from a small amount of experimental data and has considerable accuracy for new BCs and locations. In addition, preliminary studies show that it has the potential for cavitation prediction in unseen cryogenic liquids or over new geometries without retraining. The work highlights the potential of merging simple physical models and neural networks together for cryogenic cavitation prediction.
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March 2023
Research Article|
March 22 2023
A theory-informed machine learning approach for cryogenic cavitation prediction
Special Collection:
Cavitation
Jiakai Zhu (朱佳凯)
;
Jiakai Zhu (朱佳凯)
(Conceptualization, Funding acquisition, Investigation, Methodology, Resources, Validation, Writing – original draft)
1
Zhejiang Lab
, Hangzhou 311121, China
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Fangtai Guo (郭方泰)
;
Fangtai Guo (郭方泰)
(Conceptualization, Investigation, Methodology, Validation, Writing – original draft, Writing – review & editing)
1
Zhejiang Lab
, Hangzhou 311121, China
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Shiqiang Zhu (朱世强);
Shiqiang Zhu (朱世强)
(Conceptualization, Methodology, Writing – original draft, Writing – review & editing)
1
Zhejiang Lab
, Hangzhou 311121, China
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Wei Song (宋伟)
;
Wei Song (宋伟)
a)
(Conceptualization, Resources, Supervision, Writing – review & editing)
1
Zhejiang Lab
, Hangzhou 311121, China
a)Authors to whom correspondence should be addressed: weisong@zhejianglab.com; litiefeng@zju.edu.cn; and zhangxbin@zju.edu.cn
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Tiefeng Li (李铁风)
;
Tiefeng Li (李铁风)
a)
(Resources, Supervision, Writing – review & editing)
2
Department of Engineering Mechanics, Zhejiang University
, Hangzhou 310027, China
a)Authors to whom correspondence should be addressed: weisong@zhejianglab.com; litiefeng@zju.edu.cn; and zhangxbin@zju.edu.cn
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Xiaobin Zhang (张小斌)
;
Xiaobin Zhang (张小斌)
a)
(Supervision, Writing – review & editing)
3
Institute of Refrigeration and Cryogenics, Zhejiang University
, Hangzhou 310027, China
a)Authors to whom correspondence should be addressed: weisong@zhejianglab.com; litiefeng@zju.edu.cn; and zhangxbin@zju.edu.cn
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Jason Gu (顾建军)
Jason Gu (顾建军)
(Resources, Writing – review & editing)
1
Zhejiang Lab
, Hangzhou 311121, China
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a)Authors to whom correspondence should be addressed: weisong@zhejianglab.com; litiefeng@zju.edu.cn; and zhangxbin@zju.edu.cn
Note: This paper is part of the special topic, Cavitation.
Physics of Fluids 35, 032118 (2023)
Article history
Received:
January 14 2023
Accepted:
March 03 2023
Citation
Jiakai Zhu, Fangtai Guo, Shiqiang Zhu, Wei Song, Tiefeng Li, Xiaobin Zhang, Jason Gu; A theory-informed machine learning approach for cryogenic cavitation prediction. Physics of Fluids 1 March 2023; 35 (3): 032118. https://doi.org/10.1063/5.0142516
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