Jurriaan Gillissen




Laboratory for Aero and Hydrodynamics
Leeghwaterstraat 21
2628 CA Delft
The Netherlands

tel: +31-15-278-2961
fax: +31-15-278-2947

j.j.j.gillissen@tudelft.nl

Newtonian

Suspension



PhD Research Topic

Numerical simulation of the turbulent drag reduction by fibres.

Supervisor:

The addition of fibers (elongated particles) to a turbulent boundary layer, induces a reduction of the turbulent drag. To understand this process we perform computer experiments, in which we solve the fluid equations of motion as well as the forces between the particles and the fluid. The movies show a flow with particles (suspension) and a flow without particles (Newtonian). The flow is driven in the direction normal to the screen in between two parallel walls, located at the top and the bottom of the frames. Grayscale indicates the velocity (black=slow, white=fast).




Publications


Gillissen, J. J. J. ,Boersma, B. J. ,Mortensen, P. H. & Andersson, H. I. 2007
On the performance of the moment approximation for the numerical computation of fibre stress in turbulent channel flow.
Phys. Fluids 19, 035102.

Gillissen, J. J. J. ,Boersma, B. J. ,Mortensen, P. H. & Andersson, H. I. 2007
The stress generated by non-Brownian fibres in turbulent channel flow simulations.
Phys. Fluids 19, 115107.

Mortensen, P. H. ,Andersson, H. I. ,Gillissen, J. J. J. & Boersma, B. J. 2007
Particle spin in a turbulent shear flow.
Phys. Fluids 19, 078109.

Mortensen, P. H. ,Andersson, H. I. ,Gillissen, J. J. J. & Boersma, B. J. 2007
On the orientation of ellipsoidal particles in a turbulent shear flow.
accepted for publication in Int. J. Multiphase Flow

Gillissen, J. J. J. ,Boersma, B. J. ,Mortensen, P. H. & Andersson, H. I. 2008
Fibre-induced drag reduction.
accepted for publication in J. Fluid Mech.