Chaire de calcul scientifique   Institut AeroTechnique de Saint-Cyr l'École CNAM IAT
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Hassiba HADJ-AMAR
Ph.D. Mechanics (CNAM Paris, 2003)
under the supervision of Philippe Destuynder and olivier Wilk

 Phone number : (514) 278 - 02 48

E-mail address:
hassiba_hadjamar@videotron.ca
 


Research areas : Computational fluid dynamics,  Scientific computing, inverse problems, shape optimization, data assimilation.

Research Interests :
The reconstruction of a fluid's flow geometry is an important element in the work of aircraft and automotive constructors. It allows to get more informations about the flow over the structure wich is essential for the conception, the comfort and the security.
The constructors use the experimentation and numerical simulations. The experimentation requires the instrumentation of the structure and many tests in a wind-tunnel. The cost can be very high. The numerical simulations require accurate and fast numerical methods to reproduce physical phenomena. By using a Navier-Stokes code we can obtain very good results but it could take several days of computation. The cost can be very high too. The using of Data Assimilation combined with a simple numerical model can reduce this cost.
In my Ph.D. work, we are looking to identify principal streamlines of a fluid's flow over a structure, particularly, the streamlines border between two differents flows areas. For example, an irrotationnal incompressible flow area and the wake (rotationnal flow). For that, we have got observations and a simple numerical model.
Pratically, we minimize a quadratic gap between the observation field and the numerical values obtained by the numerical model. The parameter of this minimization is the streamline we want to identify.
The numerical results show that we can identify the streamlines and minimize the objective-function until 10^-7 even when we use pertubated data.

My curriculum vitæ, including a list of my talks
(PostScript or PDF version)
 
An abstract of my Ph.D. thesis
(PostScript or PDF version)

Version francaise

Last update :   January 15, 2005