CFD – Page 2 – TechConnect Briefs

The Immersed Surfaces Technology for Reliable and Fast Setup of Microfluidics Simulation Problems

Icardi M., Caviezel D., Lakehal D., ASCOMP GmbH, CH

ASCOMP has developed a new fully automatized version for microfluidics applications in bio-devices, using the IST (Immersed surfaces Technique) technique to map complex components/geometries into a simple rectangular Cartesian grid. Near wall regions are treated [...]

A lattice Boltzmann study of the non-Newtonian blood flow in stented aneurysm

Kim Y.H., Farhat S., Lee J.S., Wayne State University, US

The treatment of cerebral aneurysms with a minimally invasive porous stent has recently been proposed to prevent rupture and favor coagulation mechanism inside the aneurysm. But, an irregularly shaped and wide-necked aneurysm makes current stent [...]

A Self-vortical Micromixer and its Application on Micro-DMFC

Lin C., Fu C., Institute of NanoEngineering and MicroSystems, TW

In this study, we demonstrate a new passive micromixer, a self-vortical micromixer, and integrated this micromixer into a micro-DMFC.

Ultrasound-driven viscous streaming, modelled via momentum injection

Packer J., Attinger D., Ventikos Y., University of Oxford, UK

Mixing, particle transport, and lysis of biological cells can be performed in microfluidic chips by actuators based on the controlled motion of a gas-liquid interface. There is strong motivation to develop practical and tractable computational [...]

Experimental and numerical investigations of the influence of fluid dynamics on the precipitation of nanoscaled particles

Gradl J., Peukert W., Friedrich-Alexander-University of Erlangen-Nuremberg, DE

Precipitation depends on competing kinetics of various interacting parallel and subsequent steps. These are mixing, chemical reactions, nucleation, growth, aggregation and stabilization. The coupling of all subprocesses is the key for predicting the PSD. In [...]

Computational Heat Transfer and Two-phase Flow in Miniature Tubes

Lakehal D., Narayanan C., ASCOMP, CH

We will report on our recent advances made in predicting this class of flow, using the Level Set approach, in which we have incorporated phase-change capabilities, surface tension and triple-line dynamics models based on the [...]

Computational Modeling of a Piezoelectrically Actuated Microvalve for the Control of Liquid Flowrate

Saeidi S.M., Khodadadi J.M., Johnson C.A., Lee C., Yang E.H., Auburn University, US

Computational modeling of liquid flow in a piezoelectrically actuated microvalve is discussed. A 3-D structured mesh with 330,000 hexahedral cells that represents the major features of the microvalve was generated for the numerical model. Due [...]

Computational Analysis of On-line Coupled ITP-CE

Horner M., Fluent, Inc., US

Lab-on-a-chip technologies combine a sequence of chemical and/or biological analyses on a miniaturized platform to perform an analytical task or series of tasks. Lab-on-a-chip applications include chemical/biological agent detection, DNA sequencing/analysis, and drug discovery, to [...]

Modeling Particle Hydrodynamic Transport in an Idealized Nanoscale Bio-Motor

Longest P.W., Pidaparti R.M., Virginia Commonwealth University, US

In the cell, hydrodynamic characteristics of the nuclear pore complex (NPC) are characterized by Stokesian liquid flow dynamics and high relative particle diffusion rates. As such, the hydrodynamics model of the NPC will be based [...]

Numerical Modelling of a Microfluidic Ultrasonic Particle Separator

Townsend R.J., Hill M., Harris N.R., White N.M., Beeby S.P., University of Southampton, UK

Particles held in a fluid suspension and within an acoustic standing wave experience an acoustic radiation force. The force causes particles to move to the pressure nodes of the acoustic field creating a concentrate, contributing [...]