This example model shows how an object is detected by radar, using perfectly matched layers to absorb outgoing waves without reflecting them. A new lumped port type is included in comsol multiphysics version 5. For users of the acdc module, comsol multiphysics version 5. Floating potential boundary condition in comsol electrostatics ac dc module. For users of the design module, comsol multiphysics version 5. The user interface for this new functionality is almost identical to the old one, so users familiar with the previous coil current calculation functionality will already be familiar with the usage of the new version.
Comsol tutorial 2 cairo university arabic narration duration. Introduction when propagation delays become important, it is necessary to use the full maxwell. In this set of six tutorial models and associated documentation, you can investigate the capacitive, inductive, and thermal properties of a standard threecore leadsheathed crosslinked polyethylene, highvoltage alternating current xlpe hvac submarine cable 500 mm 2, 220 kv. With comsol multiphysics and the ac dc module you can model static and lowfrequency computational electromagnetics. Several types of finite element and boundary element mesh elements are available. Under the hood, the ac dc module formulates and solves maxwells equations using fem, bem, or a combination of both methods, in concert with stateoftheart solvers. The coil current calculation functionality available in previous versions of comsol multiphysics has been replaced with a new coil geometry analysis functionality.
The coplanar waveguide bandpass filter tutorial model presents a design that is compact in relation to its resonant frequency and provides a relatively high q factor as compared to capacitively coupled microstrip line. Theres a new book out there for those of you who work with or research electromechanical system design. By simulating electric, magnetic, and electromagnetic fields in static and transient applications, you can virtually design and analyze capacitors, inductors, insulators, coils, motors, sensors, and more. Browse through the release highlights to find out what is new or download comsol version 5. This chapter introduces you to the capabilities of the acdc module including an introduction to the modeling stages and some realistic and illustrative models. Coil without skin effect begin this study of induced currents by modeling a currentcarrying coil without skin effect. This stepbystep instructional video will guide you through the modeling workflow, with an emphasis on structural mechanics modeling. This chapter introduces you to the capabilities of the ac dc module including an introduction to the modeling stages and some realistic and illustrative models. This functionality is built into the external material feature and allows. This particular module solves problems in the general areas of electrostatic fields. How to use the comsol desktop modeling environment youtube. With comsol multiphysics and the acdc module you can model static and lowfrequency computational electromagnetics. Review all of the rf module updates in further detail below.
Modeling electromagnetic coils in comsol multiphysics. Import of ecad layouts with new functionality for easy filtering of cells, nets, and layers. Mar 03, 2016 one of the most common uses of the ac dc module is for modeling electromagnetic coils and the interactions with their surroundings. The ac dc module offers automatic, semiautomatic, and adaptive mesh generation. To view the mass transfer boundary conditions, expand the transport of diluted species and view the various tabs which include boundary conditions and initial values. This is a multiphysics model because it involves fluid dynamics coupled with heat transfer.
The use of the acdc module the acdc module can model electric, magnetic, and electromagnetic fields in statics and lowfrequency applications. Under the hood, the acdc module formulates and solves maxwells equations using fem, bem, or a combination of both methods, in concert with stateoftheart solvers. Learn how to use the acdc module to analyze lowfrequency electromagnetics problems. Electromagnetics modeling in comsol multiphysics the ac dc and rf modules. Furthermore, comsol multiphysics and its addon modules have also been improved. Acdc module users guide 19982012 comsol protected by u. Get an introduction to modeling electromagnetic coils using comsol multiphysics and the addon ac dc module. The ac dc module physics interfaces are fully multiphysics enabled, which means you can couple any simulation in this module to an arbitrary simulation defined in any of the comsol multiphysics interfaces.
Comsol post processing how to plot ac voltage vs time in. Rf module users guide 19982012 comsol protected by u. Design optimization for electromechanical applications the multiphysics simulation. Acdc module, mems module, plasma module, or semiconductor module the combination of comsol products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. This example describes an array of heating tubes submerged in a vessel with fluid flow entering at the bottom. Once connected to circe, you can open comsol using the steps below. One of the reasons i did this blog thing, was for this. Simulate static and lowfrequency electromagnetics with. Software for simulating static and lowfrequency electromagnetics. Learn how to use comsol multiphysics and the structural mechanics module by conducting a static analysis of a mechanical structure. This increases the flexibility and the modeling capabilities of the physics interfaces. In part 1 of this 5part video series, you will get a stepbystep demonstration of how to model a singleturn coil to solve for the magnetic vector potential. This will open up comsol library where you see many comsol files to solve chemical reaction engineering problems.
If you click on no flux 1 you can find the equation that is applied under equation and the boundary on which this equation is applied. This is a reference guide on simulation and topology optimization written with both students and industry engineers in mind. Lets concentrate from now on and for a good while, on acdc tutorials wise, i mean, heroes of rock and roll for many of us here. Today, we will look into one of the key concepts to keep in mind when modeling coils. When modeling the linear or tubular device with the magnetic fields and the moving mesh physics interfaces, it is appropriate to use a customized linear periodic boundary condition. It uses the multielement uniform lumped port feature of the comsol multiphysics software in order to excite andor terminate each element of the respective ports equally. For users of the ac dc module, comsol multiphysics version 5. The acdc module physics interfaces are fully multiphysics enabled, which means you can couple any simulation in this module to an arbitrary simulation defined in any of the comsol multiphysics interfaces. Back in black tutorial from solodallas on vimeo okay, so the moment has come.
How to model structural mechanics in comsol multiphysics. You can supply an ac voltage to your model simply by entering a function for ac. For example, vac vsin2pift, where v amplitude, f frequency, t time variable. Electromagnetics modeling in comsol rf module highfrequency modeling microwave heating acdc module statics and lowfrequency modeling induction heating plasma module model nonequilibrium discharges mems module statics subset of acdc module advanced statics electromechanics. The following addition to the new functionality in comsol multiphysics is of special interest for users of the acdc module. With this new functionality, you can discard the solution in the perfectly matched layer and only store the solution in the space surrounding the boat, reducing the size of the solution from 184 mb to 142 mb. Comsol, comsol desktop, comsol multiphysics, and livelink are registered trademarks or trademarks of comsol ab. Acdc module updates for users of the acdc module, comsol multiphysics version 5. Introduction to acdc module budapest university of. The rotating machinery, magnetic physics interface available in the acdc module is used to model rotating machines such as motors or generators.
For electrostatic, magnetostatic, and quasistatic electromagnetics, use the ac dc module, a comsol multiphysics addon module for lowfrequency electromagnetics. The transmission line parameters r, l, g, and c can be used to characterize any tem and quasitem. Uber comsol multiphysics modellierungsbeispiele zum. The series is intended both for experts looking to get up to speed on how to model such. Im not sure how your model is setup, but if you have entered a dc voltage you can change the function to ac. The magnetic fields physics interface in the acdc module, and the corresponding 2d interfaces in the core comsol multiphysics software, can now use external material models implemented as userdefined dynamic libraries. Electromechanical system applications and optimization and is more than your average textbook. As a consequence of the computed current flow, a magnetic field arises and surrounds the wire. Modeling computational electromagnetics with the acdc module. I also use combine solution in frequency domain study 1 at 1hz and study 2 at 10khz in comsol 5.
Rf module updates for users of the rf module, comsol multiphysics version 5. Alternatively, for windows, mac, and linux users, comsol can also be launched through a remote desktop connection, then opening a terminal, loading the appropriate module file, and typing comsol. This problem can be solved using the finite element method as implemented in the acdc module in comsol multiphysics. This book in the multiphysics modeling series present the reader with a solved problem that utilizes the acdc module.
Access features for specialized lowfrequency electromagnetics modeling by adding the acdc module to the comsol multiphysics software. The pressure and the velocity field are the solution of the navierstokes equations. Oct 06, 2015 the rotating machinery, magnetic physics interface available in the ac dc module is used to model rotating machines such as motors or generators. Comsol post processing how to plot ac voltage vs time in comsol. Model navigator 1 begin a new comsol multiphysics session by invoking the model navigator. Electromagnetics modeling in comsol multiphysics the acdc and rf modules. Comsol lep tutorial for tank flow system two cstr in series. Acdc module application gallery examples comsol multiphysics. Electromechanical system applications and optimization book, authored by ercan dede, jaewook lee, and tsuyoshi nomura, fills a gap in.
The acdc module provides a unique environment for simulation of acdc electromagnetics in 2d and 3d. Click on run in browser to start the application you will see that following window opens which has input parameters, description, graphical features and a few buttons. Browse the collection of stepbystep tutorial models. Comsol multiphysics package or the heat transfer module. Modeling linear motors or generators in comsol multiphysics. Mechanical fatigue based on stress or strain evaluations. This forms a powerful multiphysics model that solves all the equations simultaneously. The acdc module offers automatic, semiautomatic, and adaptive mesh generation.
Tutorial for running comsol files from comsol website. A coplanar waveguide bandpass filter on a 200 mm gaas wafer composed of an interdigital capacitor and shortcircuited stub inductors. Mar 17, 2016 in the comsol multiphysics simulation software, the comsol desktop is used to build, solve, and analyze multiphysics models. Does anyone know what is the boundary condition applied at each node of the mesh when choosing the floating potential.
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