Tue, 19 Nov 2013

13:15 - 14:00
C4

Optimizing cross-flow-filtration efficacy using variable wall permeabilities (JH) and Volumetric image segmentation (IvG)

James Herterich and Ingrid von Glehn
(OCCAM, University of Oxford)
Abstract

JH: Water filtration systems typically involve flow along a channel with permeable walls and suction applied across the wall. In this ``cross-flow'' arrangement, clean water leaves the channel while impurities remain within it. A limiting factor for the operation of cross-flow devices is the build-up of a high concentration of particles near the wall due to the induced flow. Termed concentration polarization (CP), this effect ultimately leads to the blocking of pores within the permeable wall and the deposition of a ``cake'' on the wall surface. Here we show that, through strategic choices in the spatial variations of the channel-wall permeability, we may reduce the effects of CP by allowing diffusion to smear out any build up of particles that may occur. We demonstrate that, for certain classes of variable permeability, there exist optimal choices that maximize the flux of clean water out of a device.

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IvG: TBC

Fri, 08 Feb 2013

11:30 - 13:00
OCCAM Common Room (RI2.28)

OCCAM Group Meeting

Various
(OCCAM, University of Oxford)
Abstract
  • Jean-Charles Seguis - Simulation in chemotaxis and comparison of cell models
  • Laura Kimpton (née Gallimore) - A viscoelastic two-phase flow model of a crawling cell
  • Benjamin Franz - Particles and PDEs and robots
Fri, 09 Jul 2010

11:45 - 13:00
OCCAM Common Room (RI2.28)

OCCAM Group Meeting

Various
(OCCAM, University of Oxford)
Abstract

OCCAM Group Meeting 09.07.10

Thu, 13 May 2010

14:00 - 15:00
3WS SR

RBF collocation methods for delayed differential equations

Dr Francisco Bernal
(OCCAM, University of Oxford)
Abstract

Meshless (or meshfree) methods are a relatively new numerical approach for the solution of ordinary- and partial differential equations. They offer the geometrical flexibility of finite elements but without requiring connectivity from the discretization support (ie a mesh). Meshless methods based on the collocation of radial basis functions (RBF methods) are particularly easy to code, and have a number of theoretical advantages as well as practical drawbacks. In this talk, an adaptive RBF scheme is presented for a novel application, namely the solution of (a rather broad class of) delayed- and neutral differential equations.

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