Concept

Boundary conditions in fluid dynamics

Publications associées (248)

Basin boundary, edge of chaos and edge state in a two-dimensional model

In shear flows like pipe flow and plane Couette flow there is an extended range of parameters where linearly stable laminar flow coexists with a transient turbulent dynamics. When increasing the amplitude of a perturbation on top of the laminar flow, one n ...

2009

Lattice Boltzmann method for the simulation of viscoelastic fluid flows

Orestis Pileas Malaspinas

The simulation of flows of viscoelastic fluids is a very challenging domain from the theoretical as well as the numerical modelling point of view. In particular, all the existing methods have failed to solve the high Weissenberg number problem (HWNP). It i ...

EPFL2009

Orbitally shaken bioreactors for mammalian cell culture

Xiaowei Zhang

Driven by the commercial success of recombinant biopharmaceuticals, there is an increasing demand for novel, cost-effective mammalian cell culture bioreactor systems for the production of biologicals requiring mammalian protein processing. Recently, orbita ...

EPFL2009

Flow in shallow rectangular basins: experimental study and 2D numerical simulations

Anton Schleiss, Sameh Ahmad Kantoush, Michel Pirotton

The planning and design of a sustainable reservoir require the accurate prediction of flow and sediment deposition patterns. Numerical simulation of flow in reservoirs is important in order to determine the detailed flow pattern. This typically includes fl ...

2008

Measuring the effect of structural connectivity on the water dynamics in heterogeneous porous media using speedy neutron tomography

The temporal and spatial distribution of water within a porous medium is affected by the medium's structure, i.e., the spatial arrangement of its constituents. To analyze structural effects on the fluid dynamics, we measured the 3D water content distributi ...

2008

Microscale airflow simulations over complex alpine terrain

Françoise Faure

Accurate microscale windfields computations over complex topography is crucial to many particle transport models but remains a challenging task. The objective of this work focuses on the numerical simulations of micro-scale windfields over the steep Gauder ...

EPFL2008

Dynamical systems and the transition to turbulence in linearly stable shear flows

Tobias Schneider

Plane Couette flow and pressure-driven pipe flow are two examples of flows where turbulence sets in while the laminar profile is still linearly stable. Experiments and numerical studies have shown that the transition has features compatible with the format ...

2008

Evolution of sediment deposition and flow patterns in a rectangular shallow reservoir under suspended sediment load

Anton Schleiss, Sameh Ahmad Kantoush

The deposition behavior of fine sediment is an important phenomenon, which remains unclear to engineers concerned about reservoir sedimentation. In the present case bed level changes, suspended sediment concentrations, and flow velocities were measured in ...

Taylor & Francis Inc, 1900 Frost Road, Suite 101, Bristol, Pa 19007 Usa2008

Film stacking impregnation model for a novel net-shape thermoplastic composite preforming process

Véronique Michaud, Martyn Douglas Wakeman, Simon Jespersen

An impregnation model has been developed to evaluate the infiltration phenomena that occur during a novel near net shape preforming method. This process comprises automated deposition of thermoplastic resin and unidirectional (UD) carbon fibres to a pre-pr ...

2008

Modeling and Study of the Influence of Sealing on a Solid Oxide Fuel Cell

Daniel Favrat, Jan Van Herle, Zacharie Wuillemin, Arata Nakajo, Nordahl Autissier, Minh-Tâm Luong

The properties of sealing materials are important for the performance and reliability of solid oxide fuel cells (SOFCs). Even if the properties of a sealing material can be studied separately, it remains difficult to quantify the effect of an imperfect sea ...

2008

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