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Multiphysics Electrifies Modeling in Many ScalesMultiphysics Electrifies Modeling in Many Scales

The Saab Group, Linköping, Sweden
Flexibility was required by the Saab Group who wanted to simulate the striking of airplane wings by lightning, as well as how much the shielding material...

A New Approach to Railgun OperationA New Approach to Railgun Operation

Benet Laboratories, US Army Research Engineering and Development Command, Watervliet, NY
Railguns-which propel a projectile using electromagnetic forces´ promise to revolutionize projectile launchers. To adequately design them, researchers must...

Electrical Imaging SystemsElectrical Imaging Systems

Riboug Research Centre, Schlumberger, France
Drilling an oil well requires a good knowledge of the subsoil. Electrical imaging provides a fuzzy picture of underground structures, which needs to be...

Multidisciplinary Modeling in Biotech ApplicationsMultidisciplinary Modeling in Biotech Applications

MEDRAD's Innovations Group, Indianola, PA
Much of MEDRAD´s research deals with the most efficient yet safest way to deliver diagnostic fluids into a patient´s body. And while fluid dynamics plays a...

Designing the Retina for an Eye Towards the PastDesigning the Retina for an Eye Towards the Past

SRON (Netherlands Institute for Space Research), Utrecht, Netherlands
XEUS (The X-Ray Evolving Universe Spectrometer) is a mission being conducted by the European Space Agency with the goal of gaining a better view of the...

Taking a Bearing on QualityTaking a Bearing on Quality

ASM Assembly Automation Ltd of Hong Kong
Porous air bearings are a critical element of high-precision machinery thanks to their essentially frictionless operation, high speed, and accuracy. Thanks to...

Example Models

Helmholtz CoilHelmholtz Coil

A Helmholtz coil is a parallel pair of identical circular coils spaced one radius apart and wound so that the current flows through both coils in the same direction. This winding results in a uniform magnetic field between the coils with...

A Tunable MEMS CapacitorA Tunable MEMS Capacitor

In an electrostatically tunable parallel plate capacitor, the distance between the two plates can be modified by a spring, as the applied voltage changes. For a given voltage difference between the plates, the distance of the two...

Linear Electric Motor of Moving Coil TypeLinear Electric Motor of Moving Coil Type

Linear electric motors (LEMs) are electromechanical devices which produce motion in a straight line directly, without the use of a mechanism to convert rotary motion to linear motion. The benefit over conventional rotary-to-linear...

Magnetic Signature of a SubmarineMagnetic Signature of a Submarine

A vessel traveling on the surface or under water gives rise to detectable local disturbances in the Earth’s magnetic field. These disturbances can be used to trigger weapon systems. The magnetic signature of a ship can be reduced by...

Simulating a Generator in 3DSimulating a Generator in 3D

The generator analyzed in this model consists of a rotor with permanent magnets and a nonlinear magnetic material inside a stator of the same magnetic material. The model calculates the static magnetic fields inside and around the...

Bond Wires to a ChipBond Wires to a Chip

Bonding wires connect an integrated circuit to the pins of the package that holds it. These wires introduce relatively large inductances that can introduce crosstalk and distort the signals. This model calculates the lumped parameters...

Inductance of a Power InductorInductance of a Power Inductor

Power inductors are a central part of many low-frequency power applications. They are, for example, used in the switched power supply for the motherboard and all other components in a computer. Computer simulations are necessary in the...

Model of an RFID SystemModel of an RFID System

An RFID system consists of two main parts: A tag or transponder with a printed circuit-board (PCB) antenna A reader unit with a larger RF antennaThe reader antenna generates an electromagnetic field that energizes a chip (IC-circuit)...

LoudspeakerLoudspeaker

This is a model of a loudspeaker of the dynamic cone driver type, common for low and medium frequencies. The instructions walk you through modeling its electromagnetic, structural, and acoustic properties. The output from the model...

3D Quadrupole Lens3D Quadrupole Lens

Just like optical lenses focus light, electric and magnetic lenses can focus beams of charged particles. Systems of magnetic quadrupole lenses find a common use in focusing both ion and particle beams in accelerators at nuclear and...

The Electromagnetic Fields from a RailgunThe Electromagnetic Fields from a Railgun

A Railgun is a type of magnetic accelerator gun that utilizes an electromagnetic force to propel an electrically-conductive projectile. Current flowing through the rails sets up magnetic fields perpendicular to each other, forcing the...

Simulation of an Electromagnetic Sounding Method for Oil ProspectingSimulation of an Electromagnetic Sounding Method for Oil Prospecting

The Controlled Source Electromagnetic (CSEM) method for oil prospecting has emerged as a promising technique during recent years. The method uses a mobile horizontal electric dipole transmitter and an array of seafloor electric receivers....

Simulating a Generator in 2DSimulating a Generator in 2D

In this model, a rotor with permanent magnets and a nonlinear magnetic material rotates within a stator of the same magnetic material. The generated voltage in windings around the stator is calculated as a function of time. COMSOL...

Simulating a Generator in 2D using Periodic Boundary ConditionsSimulating a Generator in 2D using Periodic Boundary Conditions

This model of a generator includes an ordinary differential equation (ODE) for the mechanical dynamics and computation of the torque resulting from the magnetic forces. In addition, it exploits symmetry to reduce the model size to 1/8...

Magnetic Prospecting of Iron Ore DepositsMagnetic Prospecting of Iron Ore Deposits

Magnetic prospecting is a method of geological exploration applicable to certain types of iron ore deposits, in particular those made up of magnetite and hematite. Estimating center-of-mass coordinates and the spatial extent of iron-rich...

Planar Transformer on a PCBPlanar Transformer on a PCB

A planar transformer integrates onto a printed circuit board (PCB) to improve its cooling characteristics while giving the device a low profile. They are used extensively in power supplies and DC/DC converters, where a slim high-power...