Pmcpec boundary conditions and plane wave simulation. The comsol multiphysics fea software comes with predefined physics interfaces with specialized settings, making it easy to set up and run analyses. Computing the plane electromagnetic wave transient propagation in. You can mix and match the rf module with any addon module or livelink product from the product suite, all of which seamlessly integrate with the core comsol multiphysics software platform. This model investigates the wave propagation in a photonic crystal that. Excerpt from the proceedings of the comsol conference 2008 boston computational modeling of wave propagation in a geophysical domain jason mckenna1, mihan mckenna1, sergei yushanov2, jeffrey crompton2 and kyle koppenhoefer2, 1 us army engineering research and development center, 2aces of columbus, llc corresponding author. Full wave simulation of light propagation through quarter wave plate. Any local operator, linear or not, applied to a plane wave yields a plane wave. Scattering boundary condition is set for the left and right boundary. Electromagnetic plane wave propagation can be approximated with rays for electrically large. Xpolarization plane wave zdirection propagation with boundary conditions.
Singular boundary method for wave propagation analysis in. How to use the beam envelopes method for wave optics simulations. Simulation of global seismic wave propagation through nonconforming curved finite element methods duration. Comparing 2 model files in the comsol multiphysics software. A linearly polarized plane wave option provides an easy path for defining the background field without having to worry about the validity of a mathematical definition of a plane wave at any. All discussion is related to this application mode. At the same time, pmc boundary is set for top and bottom boundary since the plane wave is te polarized. In this study, we examined propagation patterns of acoustic waves in a virtual tree trunk through numerical simulation using comsol multiphysics software comsol, inc. The ray optics module is an addon to the comsol multiphysics software that allows you to model electromagnetic wave propagation with a ray tracing approach. This example considers the acoustic wave scattering problem of a plane wave u i e i k x 3 cos. The hexagonal air holes in cladding have been studied based on comsol multiphysics software. The simulation of the electromagnetic wave propagation plays an important role in solving the communication blackout issue. It is a complex problem to calculate the photonic crystal fiber model, and the methods of plane wave expansion, hermiteguasssian function and beam propagation have been analyzed.
However, the simulation result shows that the plane wave suffers much distortion as propagating even in the uniform space. Sound here means not only what is detected by the human ear but also infrasound and ultrasound. How to simulate a tiltedobliquely angled plane wave in. Explore the use of this new feature with an example of polarizationdependent scattering from our model gallery. Representation of a standing wave top and a propagating wave bottom. Numerical study of the scattering of a shortpulse plane wave by a buried sphere in a lossy medium the scattering by a buried sphere in the frequency domain with the use of the finite element method fem implemented by comsol multiphysics, is analyzed. The wave optics module users guide comsol documentation. Learn more about the wave optics module updates in more detail below.
I think that matlab is not the best software to simulate ray wave optics. The pressure acoustics interface in comsol 4 is used for this investigation. Browse all of the wave optics module updates below. Three finite element models of a spherical domain loaded by a point source were developed in comsol multiphysics. Wave optics software for analyzing micro and nanooptical. Numerical study of the scattering of a shortpulse plane. The application gallery features comsol multiphysics tutorial and demo app files. The structural mechanics module includes both predefined material models to choose from and the ability to enter userdefined material models, depending on the nature of your analysis. The wave optics module includes a specialized beam envelope method that can be used to simulate optically large devices with far fewer computational resources than traditional methods. For 2d problems, the electric field can be rewritten as. I want to simulate a narrow plane wave pulse propagation in the free space. Ports and lumped ports for wave electromagnetics problems.
Read about these and many more acoustics module updates below. Assume that i have to decompose fourier transform the pulse into many cw signals. This means that your modeling workflow remains the same regardless of the application area or physics you are modeling. A plane electromagnetic wave propagating through free. The speed of sound in air is about 343 ms and 1485 ms in water. I use a plane wave as the illumination field,specifically i set a cubic configuration surrounded by pml.
Acoustics is the physics of sound, including all of the multiphysics disciplines concerned with the production, transmission, and detection of the sound signal. This model demonstrates the simulation of the scattering of a plane wave of light. Port feature settings window with the rectangular port type selected and wave excitation enabled for the plane wave mode 0,0. Electromagnetic plane wave propagation can be approximated with rays for electrically largeenough objects relative to wavelength. The sound propagation in the medium is handled by the wave propagation equation. This application mode assumes that the out of plane strain is zero. Wave propagation software, computational science, and. You can use the specialized features to visualize acoustic fields and build virtual prototypes of devices or. Create rf, microwave, and millimeter wave designs with the rf module. How to use the beam envelopes method for wave optics.
It is applied in the commercial software comsol multiphysics. Now i want to use comsol to simulate pulse propagation in free space. Help, in comsol how to set a perfect plane wave 3d. A method for computing the electromagnetic wave transient propagation. Jun 26, 2018 today, well talk about a more accurate formulation for gaussian beams, available as of version 5. The simulation was based on the elastic theory of the solid medium with the assumption of the orthotropic material for standing trees. Surface transverse waves in plane wave approximation. How can we know the wave produced is an te plane wave.
Could anyone explain to me how to apply the plane wave excitation for these structures using comsol multiphysics software. The simulation of the electromagnetic wave propagation plays an. When using either the 2d or the 2d axisymmetric in plane formulations, it is also possible to specify an outof plane wave number. Kalinowski1 1university of connecticut, east lyme, ct, usa abstract introduction. The results show the computed scattering coefficients and transmission loss of the duct system, as well as an isosurface plot of the pressure at 710 hz. Fullwave simulation of light propagation through quarter. Multiphysics simulation of the effect of sensing and. Here, i am considering an analytical wave equation as a acoustic wave which is shown in. Stress wave propagation in larch plantation treesnumerical. However, the simulation result shows that the plane wave suffers much distortion as propagating even in. Currently, plane wave does not support the tilting angle. Its main features include the perfectly matched layer pml technique to emulate radiating boundary conditions beyond a critical cutoff layer for the fast wave fw, full wave propagation across the inhomogeneous cold peripheral plasma and a detailed description of the wave launcher. The plane wave excitation is placed in the air region closer to the bottom. Sketch view of state of the art saw stw resonator topology.
Wave propagation software, computational science, and reproducible research 3 can be built upon and used as a subroutine in future work. With material index properties, it is possible to simulate either in thz or wavelength operation. We present a full wave simulation of light propagation through a quarter wave plate based on finite element method. Scattering boundary condition and port with plane wave. Simulation tools for solving wave electromagnetics problems. Thus, changing the slope of the gradient will change the broadside angle of propagation, and so an. I was trying to propagate a transient plane wave sinusoidal in 3d structure in time domain. This formulation based on a plane wave expansion can handle nonparaxial gaussian beams more accurately than the conventional paraxial formulation. Can anyone tell me how to define the equation for plane wave in rf module for time domain problem. The plane wave shape can be set by setting the rectangular wave parameters in the input wave properties dialog box. A plane wave can be studied by ignoring the directions perpendicular to the direction vector. Browse all of the wave optics module updates in more detail below. We can observe from the above graph that as the incoming plane wave approaches grazing incidence, the wave is almost completely reflected.
Warning your internet explorer is in compatibility mode and may not be displaying the website correctly. In rf or wave optics module of comsol, the port condition is used as plane wave excitation. How do i do simulation of shear and pressure waves. The reflection coefficient for a plane wave incident upon a firstorder sbc at varying incidence is plotted below. Computational modeling of wave propagation in a geophysical. Thus, if the in plane vector component is nonzero for a particular diffraction order, this means that the incoming wave. The outof plane vector component is the diffracted beam that is polarized out of the plane of diffraction the plane defined by \bfn and \bfk, while the in plane vector component has the orthogonal polarization. The following plots show the solution from the model in the application library and from two model files that recreate the example but use an incorrect inlet pressure amplitude and outlet boundary selection, respectively. I am not sure what comsol s capabilities are in terms of wave. The wave optics module, an addon to the comsol multiphysics platform software, is an efficient choice for your optical modeling needs. I am designing a acoustic wave propagation inside a oil fill transformer using comsol multiphysics software. Apr 15, 2019 the model contains a simulation of the pressure wave propagation in a muffler for a combustion engine. The beam envelopes method in the comsol multiphysics software is one option for this purpose. Comsol multiphysics software as a metasurfaces design tool.
I chose one interior boundary and set it as transition boundary condition and set the ex1 xpolarized plane wave propagating along z direction. Co ltd, changhua city, changhua county 50053, taiwan. Wave optics module application gallery examples comsol. In this work, we used the piezoelectric devices application mode of the structural mechanics module of comsol 4. I specify the input quantity as electric field, with the electric mode being ex,ey 0 and ez 1. Assume the propagation speed is the speed of light and the carrier frequency of the signal is 100 mhz. I have managed to produce a plane wave in a periodic structure using two ports. In plane, axisymmetric, and full 3d electromagnetic wave propagation full vector mode analysis in 2d and 3d material properties include inhomogeneous and fully anisotropic materials, media with. This is because the waves that appear in the system need to be resolved by a sufficiently fine mesh. And pmls are used for top, bottom and right boundaries. Finite element analysis software package comsol is employed by us to mode.
Mar 20, 2015 a linearly polarized plane wave a new background wave type in available in comsol multiphysics version 5. I tried three methods as mentioned in several models. Modeling software for rf, microwave, and millimeterwave. It is shown, how the light is refracted or reflected. The propagating waves are treated as rays that can be reflected, refracted, or absorbed at boundaries in the model geometry. Simulation software for analyzing acoustics and vibrations. Comsol is used for obtaining the quantum mechanics wave function. A shortpulse is used as an excitation with the spectrum spanning from 50 mhz to 1 ghz.
I still have trouble on defining a plane wave in comsol 2d model. Our preliminary results indicate that the structural mechanics module of the comsol multiphysics software is capable of simulating the longitudinal wave propagation in standing trees. Finite element analysis software package comsol is employed by us to model the electromagnetic wave propagation in the presence of the nonuniform reentry plasma sheath in this paper. Usually when dealing with plane wave propagation you will have as input parameter angle of incidence, plane of incidence, and input power. Inplane, axisymmetric, and full 3d electromagnetic wave propagation full vector mode analysis in 2d and 3d material properties include inhomogeneous and fully anisotropic materials, media with. Reflection of a plane wave at the firstorder sbc with respect to angle of incidence. The nonparaxial gaussian beam formula for simulating wave. The simulationwas based on the elastic theory of a solidmediumwith the assumption of an orthotropicmaterial for a standing tree. We will demonstrate how to model different types of excitation, such as plane wave, dipole wave, and cylindrical wave excitation. Review all of the wave optics module updates in further detail below. Modeling software for rf, microwave, and millimeterwave designs. In neither case is it possible for the electromagnetic wave to penetrate into regions of the plasma where the electron density exceeds the critical electron density around. The wave propogates in the x direction, and i specify two userdefined ports at the vertical edges of the rectangle x0. Recently, i have been trying to simulate the spp generation from single slit under the normal incidence of tm plane wave, a very basic simulation in plasmoncis, using rf\in plane waves\tm waves\harmonic propagation model.
With the rf module, you can optimize designs by investigating effects such as electromagnetic wave propagation, microwave heating, and rf heating ensuring that you create the best products possible and get ahead of others in your field. I am also confused on the background definition of plane wave. Jul 22, 2009 i am recently doing some 3d scattering simulation. This is appropriate to use when there is a known outof plane propagation constant, or known number of azimuthal modes.
You will also learn how to use the port condition to excite a waveguide structure, evaluate scattering parameters, and plot e field propagation for different phases without recomputing the model. The physics of a microwave plasma are quite different depending on whether the te mode outof plane electric field or the tm mode in plane electric field is propagating. Comsol is the developer of comsol multiphysics software, an interactive environment for modeling and simulating scientific and engineering problems. A plane wave is incident at an angle onto a glass substrate, reflecting at the. Modeling with linearly polarized plane waves comsol blog. To be able to properly define plane wave excitation in comsol, we need to know to decompose arbitrary vector in cartesian coordinates.
This is consistent with the plane wave assumption with. I define the incident plane wave in port on the left boundary. Finite element analysis software package comsol is employed by. Currently, the plane wave simulation is only effective for symmetrical structures. Comsol multiphysics software as a metasurfaces design. Plane wave propagation in 3d structure comsol multiphysics. The background field can be a linearly polarized plane wave.
Finally the multipole method is adopted for solving problem. Jan 08, 2018 in the wave optics field, it is difficult to simulate large optical systems in a way that rigorously solves maxwells equation. Products, components, and devices can always be improved. Comsol multiphysics, rf module users guide comsol, 2012.