Proposition de stage soutenu par le Laboratoire d’Excellence ORACLE
Master internship supported by Laboratory of Excellence ORACLE à Nantes Université project OMDYHEAT
Context
This proposal is the continuation of the collaboration between LTeN and ISOMER that was initiated during the PhD of Ziad Maksassi (2019-2022) and devoted to the assessment of the thermal properties of biofouling within the federation of research IUML. A first modelling was able to compute the temperature of the effect of marine growth by considering determinsitic properties. Marien growth being a biological model, uncertainties of the thickness with time and the uncertainty on the thermal property knowing the thickness should be analyzed. The objective is top open now a new collaboration by considering all the uncertainties.
Keywords: Monitoring; Biofouling; marine growth
Master internship description (10-15 lines)
The main objective of this project is to quantify the impact of biofouling by mussels on the temperature of dynamic electrical cables in floating wind turbines by considering the uncertainties. More specifically, it involves calculating the probability of exceeding the critical temperature of 90°C, taking into account different ambient temperature conditions and the gradual growth of mussel colonies. To achieve this objective, the following specific tasks will be carried out: Model the thickness of marine growth with time by considering 2 sites (Atlantic and Mediterranean) from the model of ISOMER/UCD/ENS Paris Saclay. Model the uncertainty of the thermal properties of marine growth with time from the thickness. Couple the existing model of cross section of cables using Comsol Multiphysics with OpenTurns for uncertainty propagation. Perform a reliability analysis that takes into account uncertainties related to model parameters. Analyze the results to identify critical operating conditions and propose recommendations to improve the reliability of dynamic cables.
Thermal data relating to mussel colonization and the thermal model of an underwater cable already available in Comsol will be integrated into this study.
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This internship aims at addressing the key research issue in O]sore Wind: eUnderstand and reduce the uncertainty and risk inherent in energy production in the marine environment (Assess the service life of offshore structures in marine environment).
Master Fellowship
Expected scientific results (5-10 lines)
By assessing the thermal impacts of biofouling, we hope to propose a contribution to improve the design and maintenance of floating wind turbine power cables, thereby increasing their reliability and energy efficiency in a hostile marine environment. This is also an input for analysing the added value of an accurate monitoring of marine growth on dynamic power cables.
Information to be completed :
Surname and first name of the supervisor : Bertrand GARNIER
Research Unit1 : LTeN
Institution of affiliation : NU
Email : Bertrand.Garnier@univ-nantes.fr
Surname and first name of the co- supervisor : Franck SCHOEFS
Research Unit : ISOMER
Institution of affiliation : NU
Email : franck.schoefs@univ-nantes.fr
Starting date : between March 1st and April 1st 2026.
Duration : 4-6 months