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Strongly coupled multiphysics propels your design into the future

Successful technical innovation can only be based on robust accurate design. Today’s PLM (Product Lifecycle Management) benefits from using advanced multi-core, multi-grid computer technology. It is now possible to simulate complex strongly coupled multiphysics problems in a single simulation run and thus obtain results that were previously only achievable after lengthy (and time consuming) measurements. As a consequence, accurate multiphysics CAE cuts the number of design cycles and accelerates your innovation capacity.

Why Today’s Sensors and Actuators need Strongly Coupled Multiphysics Design.

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VIA - Vibrating Inertial Accelerometer: Based on piezo-electricdetection of a Vibrating beam. - Courtesy ONERA.

Today’s sensors and actuators often involve multiple physical phenomena such as Capacitive –Electrostatics, Piezoresistivity, Piezoelectrity, Accoustics, Thermics, Peltier effects and ElectroMagnetics.

As components are increasingly scaled down (nanotechnology, MEMS), specific microscopicphysical phenomena assume greater importance (Electrostatic effects, Peltier). Furthermore the time constants of these physical phenomena have similar orders of magnitude (electrical, mechanicaland thermal effects). Classical design techniques performing sequentially coupled simulations of the different physical phenomena will yield poor accuracy. Not so with OOFELIE::Multiphysics, which can solve more than 4 of such phenomena in a single, strongly coupled simulation setup for optimal accuracy and convergence.

Strongly Coupled CFD Multiphysics Fluid Structure Interation.

Strongly coupled FSI Multiphyisics is of importance in critical fields, often those with high security and reliability risks: potentially dangerous fluid-structure interactions (FSI) can occur in aircrafts, such as nozzle vibration, wing flutter or buffeting – and in wind turbine applications. Other Fluid-Structure Interaction applications include fuel tank sloshing or the design of piezoelectric based MEMS for flow characterization.

Strong coupling is critical for the convergence and accuracy as is illustrated by the following adapted 2D Turek benchmark.

An asymmetrically placed beam (picture left) is submitted to an incompressible flow. For the FSI. computation, the structure will vibrate because of the periodic variation of the pressure on both parts of the beam. After some time, a new periodic solution is going to be developed. This new solution is such that there is no amplification of the movement of the beam.

As can be oberseved in the graph on the right, only strongly coupling will lead to a stable accurate solution.