Prof. Peter Mustermann | Institut xxxxx | www.hzdr.deSeite 1

Sevan DRAPEAU-MARTIN | Institut für Fluiddynamik | www.hzdr.de

Numerical simulation of multi-layer deposition in a turbulent flowSevan DRAPEAU-MARTIN

Mitglied der Helmholtz-GemeinschaftSeite 2Sevan DRAPEAU-MARTIN | Institut für Fluiddynamik | www.hzdr.de

Numerical simulation of multi-layer deposition in a turbulent flow

About me : Sevan DRAPEAU-MARTIN

Senior student at the Ecole Centrale Paris : Engineering school training all-round students.

Special affinity with Applied Mathematics and Computer Science

Speak German (not well), English and French

6-month internship from 06.02.12 until 06.08.12

Mitglied der Helmholtz-GemeinschaftSeite 3Sevan DRAPEAU-MARTIN | Institut für Fluiddynamik | www.hzdr.de

Numerical simulation of multi-layer deposition in a turbulent flow

estimated total dust amount for the HTR in Juelich (1967-1988):100 to 200 kg [Moorman, 2008]

corresponding dust production rate: 5 to 10 kg/year

crack on pebble surface(erosion / abrasion / friction / oxydation)

Schlögl (2009)AVR (FZ Jülich)

Moormann (2008)

Dust deposition

Mitglied der Helmholtz-GemeinschaftSeite 4Sevan DRAPEAU-MARTIN | Institut für Fluiddynamik | www.hzdr.de

Development of a dynamic mesh to simulate multi-layer deposition

Recreating a periodic steps geometry

3D rendering of the geometry (CAD)Photograph of the multilayer deposition experiment

Mitglied der Helmholtz-GemeinschaftSeite 5Sevan DRAPEAU-MARTIN | Institut für Fluiddynamik | www.hzdr.de

Development of a dynamic mesh to simulate multi-layer deposition

Meshing around a deposition surface

Meshing around a dummy deposition following the equation : y=cos(omega*x)*exp(-x/x0)

Mitglied der Helmholtz-GemeinschaftSeite 6Sevan DRAPEAU-MARTIN | Institut für Fluiddynamik | www.hzdr.de

Development of a dynamic mesh to simulate multi-layer deposition

Meshing around a deposition surface

Meshing around deposition following experimental data (after 0, 1, 2, 3, and 4 hours)

Mitglied der Helmholtz-GemeinschaftSeite 7Sevan DRAPEAU-MARTIN | Institut für Fluiddynamik | www.hzdr.de

Development of a dynamic mesh to simulate multi-layer deposition

Flow simulation

Flow simulation in initial geometry

Flow simulation with deposition following the experimental data after 2 hours

Flow simulation with deposition following the experimental data after 4 hours