slip flow – TechConnect Briefs

Design, development and testing of apparatus to study gas diffusion in nanochannels

Karakitsiou S., Eder S.D., Holst B., Hoffmann A.C., University of Bergen, NO

In this work an apparatus, designed to measure gas diffusion through nanochannels, is introduced. All calculations for the construction have been made for 2000 nanochannels with a diameter of 100 nm and a length of [...]

Design, development and testing of apparatus to study gas diffusion in nanochannels

Karakitsiou S., Eder S.D., Holst B., Hoffmann A.C., University of Bergen, NO

In this work an apparatus, designed to measure gas diffusion through nanochannels, is introduced. All calculations for the construction have been made for 2000 nanochannels with a diameter of 100 nm and a length of [...]

Numerical Modelling and Analysis of the Burning Transient in a Solid-propellant Micro-thruster

Moríñigo J.A., Hermida-Quesada J., National Institute for Aerospace Technology, ES

The assessment of characterization and feasibility of rocket engines scaled to millimeter size, arrayed onto wafers for the propulsion of small spacecrafts, is closely related to the right prediction of the thermal response of the [...]

Compact Models for Squeeze-Film Damping in the Slip Flow Regime

Sattler R., Wachutka G., Technical Univeristy of Münich, DE

We propose a mixed-level simulation scheme for squeeze film damping effects in microdevices, which makes it possible to include damping effects in system-level models of entire microsystems in a natural, physically-based and flexible way. Our [...]

Efficient 3-D Numerical Code “FastSlipStokes” for Drag Force Calculation Due to Slip Flow

Ding J., Ye W., Georgia Institute of Technology, US

Drag force calculation due to slip flows is important in predicting the performance of the microstructures with minimum feature size around 1 mm. In this paper, an efficient numerical approach to compute the drag force [...]

Acoustic Impedance Elements Modeling Oscillating Gas Flow in Micro Channels

Veijola T., Helsinki University of Technology, FI

Acoustic impedance models for gas flow in rectangular channels are presented. The models include the effect of slightly rarefied gas (slip-flow region) and the fluid inertia effects. An equivalent circuit is presented that implements the [...]

Unsteady Gaseous Flows in Tapered Microchannels

Aubert C., Colin S., Caen R., Laboratoire de Genie Mecanique de Toulouse, FR

The aim of the paper is to contribute to the modeling of unsteady slip flows in rectangular microchannels with slowly varying cross-sections. A model is proposed for a microdiffuser submitted to sinusoidal pressure fluctuations at [...]