numerical methods – TechConnect Briefs

Evaluation of Manipulation Probes for Expanding the Range of Capillary Force

Obata K.J., Saito S., Takahashi K., Tokyo Institute of Technology, JP

It is difficult to manipulate a micro-sized object precisely with conventional tools, because the gravity effect becomes extremely small compared to the adhesional one. Therefore, in order to perform reliable micromanipulation, we need to use [...]

Multi-scale Drug Release Modeling for Targeted Oral Drug Delivery (TODD)

Haddish B.N., Nyquist C., Haghighi K., Wu H.A., Corvalan C., Rickus J., Keshavarzian A., Purdue University, US

Conventional oral dosage forms deliver their active ingredient at rates that are high initially and decline afterward, showing a first order kinetics with the release determining step considered as the dissolution rate of the active [...]

Accurate Analytical Models of Fluid Friction in Rectangular Microchannels

Tchikanda S.W., Nilson R.H., Griffiths S.K., Sandia National Laboratories, US

Liquid flow in microchannels is important to a number of technologies including cooling of microelectronics by heat pipes and capillary pumped loops as well as capillary wetting of channels in molding processes and in chip-based [...]

Self-consistent Modeling of Open Quantum Devices

Akis R., Shifren L., Ferry D.K., Arizona State University, US

In this paper, we describe a method of simulating electron transport in semiconductor devices that operate in the quantum regime. Specifically, devices formed in which the electrons are confined to two dimensions (2D) and transport [...]

Self-consistent Modeling of Open Quantum Devices

Akis R., Shifren L., Ferry D.K., Arizona State University, US

In this paper, we describe a method of simulating electron transport in semiconductor devices that operate in the quantum regime. Specifically, devices formed in which the electrons are confined to two dimensions (2D) and transport [...]

Modeling of Microfluidic Devices Using Scalable Algorithms

Stals L., Old Dominion University, US

We present parallel algorithms for the solution of micro uidic equations. The algorithm consists of the multigrid method in combination with adaptive finite elements. These methods give good algorithmic and parallel scalability and are thus [...]

Numerical Fracture Analysis of MEMS Devices

Tayebi A.K., Tayebi N., Tayebi A.K., Tayebi N., Case Western Reserve University, US

Non-conventional finite element analysis (FEA) based on linear elastic fracture mechanics (LEFM) is applied to fractured MEMS specimens with notches. The objective of this paper is to test the applicability of LEFM at mesoscale and [...]

Structure Optimization of 140 GHz Pulsed-Mode IMPATT Diode

Zemliak A., Celaya C., Garcia R., Puebla Autonomous University, MX

On the basis of an IMPATT diode complex mathematical model and an optimization procedure, results are presented for a diode structure analysis and optimization suitable for a pulsed-mode 2 mm silicon diode. The complex model [...]

Living in an Expanding TCAD Space

Borucki L.J., Motorola, Inc., US

A substantial number of important industrial modeling and simulation problems lie outside of the scope of commercial TCAD (Technology Computer-Aided Design) software.The tools needed to solve such problems include a good PDE (Partial Differential Equation) [...]