DE – Page 28 – TechConnect Briefs

Miniaturized High Speed Visualization Setup for the Diagnostics of Dynamical Processes in Microsystems

Brugger H., Maier C., Hofer E.P., University of Ulm, DE

For the real time visualization of the dynamics of MEMS it is often inevitable to use high speed camera systems because of the optical enlargement. The micro diagnostic system MinVis, which consists of a miniaturized [...]

Decay of Nanostructures

Hausser F., Voigt A., Research Center Caesar, DE

The thermal relaxation of isolated (single layer) homoepitaxial islands and craters and of isolated nanomounds is simulated using a 2+1 dimensional step flow model. Numerical simulations based on adaptive finite elements are used to study [...]

Modelling Micro-Rheological Effects in Micro Injection Moulding with Dissipative Particle Dynamics

Kauzlaric D., Greiner A., Korvink J.G., University of Freiburg, Germany, DE

It will be demonstrated how Dissipative Particle Dynamics (DPD), a particle based simulation method, can contribute to the rheological study of fluids in micro-cavities, e.g. in Micro Injection Moulding. It is already known that DPD [...]

Error Estimation for Arnoldi-based Model Order REduction of MEMS

Bechtold T., Rudnyi E.B., Korvink J.G., University of Freiburg, Germany, DE

In this paper we present a heuristic error estimation for the Pade-type approximation of transfer function via Arnoldi algorithm. We suggest using the solution of the Lyapunov equations for reduced-order systems as a stop-criterion in [...]

Numerical Computation of Dispersion Relations for Multi-layered Anisotropic Structures

Botkin N.D., Hoffmann K-H, Pykhteev O.A., Turova V.L., Center of Advanced European Studies and Research, DE

The paper presents an algorithm and a program for the computation of the propagation velocity of acoustic waves excited in anisotropic multi-layered structures. This investigation is motivated by the modeling of a biosensor that serves [...]

The Model of Porous Media – Complete Description for Aggregation of Bead-Monolayers in Flat Microfluidic Chambers

Grumann M., Dobmeier M., Schippers P., Brenner T., Zengerle R., Ducrée J., IMTEK, University of Freiburg, DE

In this paper we for the first time adopt the model of porous media to simulate the complete course of the formation of monolayers from bead suspensions in a flat microfluidic chamber. The chambers are [...]

MEMS Compact Modeling Meets Model Order Reduction: Examples of the Application of Arnoldi Methods to Microsystem Devices

Lienemann J., Billger D., Rudnyi E.B., Greiner A., Korvink J.G., IMTEK, Albert Ludwig University, DE

Modeling and simulation of the behavior of a system consisting of many single devices is an essential requirement for the reduction of design cycles in the development of microsystem applications. Analytic solutions for the describing [...]

mor4ansys: Generating Compact Models Directly From ANSYS Models

Rudnyi E.B., Lienemann J., Greiner A., Korvink J.G., IMTEK, Albert Ludwig University, DE

Model reduction of linear large-scale dynamic systems is already quite an established area [1]–[3]. In a number of papers (see references in [3]), the advantages of model reduction have been demonstrated. In the present paper, [...]

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 [...]

Three-Dimensional CFD-Simulation of a Thermal Bubble Jet Printhead

Lindemann T., Sassano D., Bellone A., Zengerle R., Koltay P., University of Freiburg, DE

This paper reports on a three-dimensional simulation of a commercial, thermally actuated bubble jet printhead using an appropriate pressure boundary condition for the bubble nucleation and expansion. The ink jet system has been used as [...]