Reconstruction by data assimilation of the inner temperature field from outer measurements in a thick pipe

The detailed knowledge of the inner skin temperature behavior is very important to evaluate and manage the aging of large pipes in cooling systems. We describe here a method to obtain this information as a function of outer skin temperature measurements, in space and time. This goal is achieved by m...

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Bibliographic Details
Published in:arXiv.org 2014-04
Main Authors: Jean-Philippe Argaud, Bouriquet, Bertrand, Assire, Aimery, Gervais, Stéphane
Format: Article
Language:English
Subjects:
Computer simulation
Cooling systems
Data assimilation
Impulse response
Numerical methods
Reconstruction
Skin temperature
Stratification
Temperature distribution
Thermal transients
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Summary:The detailed knowledge of the inner skin temperature behavior is very important to evaluate and manage the aging of large pipes in cooling systems. We describe here a method to obtain this information as a function of outer skin temperature measurements, in space and time. This goal is achieved by mixing fine simulations and numerical methods such as impulse response and data assimilation. Demonstration is done on loads representing extreme transient stratification or thermal shocks. From a numerical point of view, the results of the reconstruction are outstanding, with a mean accuracy of the order of less than a half percent of the temperature values of the thermal transient.
ISSN:2331-8422