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CFD Jobs Database - Job Record #17395

Job Record #17395
TitlePhD: Extreme response in numerical and experimental wave tanks
CategoryJob in Academia
EmployerCentrale Nantes & IIT Madras
LocationFrance, Nantes
InternationalYes, international applications are welcome
Closure DateMonday, November 22, 2021
Description:
A full-time PhD position is open, in the framework of a Joint PhD Program (JDP) 
between Centrale Nantes (France) and IIT Madras (India).


THE PROJECT:
Context:
The use of CFD codes in design has been increasing over time, however CFD is 
still difficult to use when a wide range of environmental conditions needs to 
be assessed. This is essentially due to the computational cost of CFD.
The computational cost in design process depends on the cost of one single run 
but also on the number of runs needed to evaluate the occurrence of the 
quantity of interest. On this point the rules from classification societies 
often rely on several 3-hours time-domain simulations. This is not really an 
obstacle for time domain codes based on potential flow as it is usual practice 
in engineering, but it is very difficult to apply with the CFD approach.
On the other hand, CFD-based methods have fewer limitations about complex 
geometries, breaking waves, non-linear phenomena and represent a valuable 
alternative for a number of problems. In response to high computational cost, 
the design waves approach can be a suitable methodology, because runs are 
shorter and also their number might be reduced.
To be applied successfully the design wave needs first to be computed and then 
to be realised with CFD, this requires first to be able to reproduce accurately 
a time history and then to verify that nonlinear effects are correctly 
accounted for.

Recent studies have shown that an efficient numerical wave tank can be built 
thanks to one-way coupling or forcing from a potential flow solver solution. 
With this methodology the design wave approach can be computed in two steps. It 
can be first computed by iterations using the linear or nonlinear potential 
flow code and then generated in the CFD domain.

Objectives:
Within the context expressed above, the PhD subject aims at testing the 
capability of CFD to reproduce sea states and the corresponding response of the 
structure both from a stochastic and deterministic point of view by simulating 
some equivalent design waves.

The candidate will first review existing procedures for the generation of 
design waves and classify the suitability to each of them to assess classical 
design problems. Existing methods will also be reviewed in view of the 
extension to short-crested wave conditions.

Deterministic and stochastic validation of the wave generation procedure will 
be performed, also assessing the suitability of the proposed methodology and 
further developing it if needed.

This procedure relies on the modeling of wave-structure interactions through 
the coupling of openFOAM with wave solvers (FNPT/HOS models in particular). The 
developed numerical model should be robust and accurate while targeting a 
reasonable computational effort for long-time simulations.

PROFILE OF THE CANDIDATE:
Candidates should hold a Master degree in Mechanical Engineering, Civil 
Engineering, Ocean Engineering, Fluid Mechanics, Numerical Analysis or related 
topics. Experience in scientific computing and/or experimental hydrodynamics 
will be a plus.

English fluency is mandatory.

SCHEDULE AND CONDITIONS
Schedule:
Candidates are invited to contact both main supervisors, Prof. Sriram 
Venkatachalam (vsriram@iitm.ac.in) and Prof. Pierre Ferrant (pierre.ferrant@ec-
nantes.fr) via email, with a CV and a motivation letter. Any additional 
information or document will be welcome (Master thesis, recommendations, etc).

Candidatures received after November 22nd, 2021 will not be considered.

Talks with pre-selected candidates will be organized via video-conferencing and 
the final decision should be available on December 15th 2021.

The successful candidate is expected to be enrolled by March 31st, 2022 at the 
latest. 

Conditions of employment:
The candidate will be funded for three years, starting with 6 months in 
Centrale Nantes, followed by 18 months in IIT Madras, and finally 12 months 
back in Centrale Nantes. During each of these periods, the candidate will be 
funded according to local conditions:

In IIT Madras: The stipend is Rs. 35,000 per month. If the student stays 
outside the campus, he will get a house rent allowance of Rs. 8000 per month. 
The cost of living will be approximately Rs. 10,000 per month (incl. 
accommodation+food) in Chennai.

In Centrale Nantes: The net salary is 1715 Euros per months. An additional help 
for accommodation costs from public authorities may be obtained (100 to 300 
Euros, depending on personal situation). The cost of living is approximately 
800 Euros per months (incl. accommodation+food) in Nantes.

IIT Madras https://www.iitm.ac.in

IIT Madras –Dept. Ocean Engineering https://doe.iitm.ac.in/

Centrale Nantes https://www.ec-nantes.fr/english-version

LHEEA Lab. https://lheea.ec-nantes.fr/english-version
Contact Information:
Please mention the CFD Jobs Database, record #17395 when responding to this ad.
NameProf. Pierre Ferrant
Emailpierre.ferrant@ec-nantes.fr
Email ApplicationYes
Record Data:
Last Modified17:52:21, Monday, October 18, 2021

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