Comsol electric field plot. The select or enter the variable values appropriately.

Comsol electric field plot. k0 as the expression for x-Axis Data to obtain a typical dispersion curve. Jul 10, 2018 · This will give you a 3D plot of the electric field of your system. Thanks on answer. 5a 0 Replies Syamimi Ismail Jan 5, 2012 · I've recently been using Comsol 4. We inspect them and also create some custom plots. You can display the vector quantity of interest to you in 3D domains, on surfaces, or on lines through Arrow Volume, Arrow Surface, and Arrow Line plots, respectively. EDT Wave Optics, Interfacing, General Version 5. For a scalar field (r) Poisson’s equation looks like: . Could anyone please help me in either questions? Your help is much appreciated. Is that the electric field magnitude of the component normal to the surface? Or some 'normalised' electric Feb 10, 2016 · Similarly, you could also plot these quantities in the 3D Plot Group or 2D Plot Group. Under the Data Aug 26, 2014 · Plot of Time Average Electric Field Posted Aug 26, 2014, 6:22 a. Editor’s note: This blog post was updated on 11/24/2020 to reflect new functionality and information. They can be manually Jan 27, 2018 · How to plot the flow of electric field from a point source in the air? Posted Jan 27, 2018, 10:34 a. The notation I've been using and seems to work is, d(Ex,x), if I want the gradient of the x component of the E field. EDT 1 Reply Saicharan reddy Ramireddy Jul 14, 2011 · If you want to plot along a random line in your geometry, then go to Results, and right-click Data sets => "2D Cut Line" (or 3D if you're in 3D). g, I was able to plot the electric field (graph) on the surface of a conductor/insulator or any other object, in a straight line, given the co-ordinates. Saving electric field plots Posted Feb 19, 2014, 5:07 a. Hope this helps. Let me say, if I use Electric field on circle with E0 having components as x=1 [V/m], y=1[V/m] and z=0. so for e. Note that this quantity is complex and that by default COMSOL plots the real part. Jan 14, 2017 · Plot the gradient of electric field square Posted Jan 14, 2017, 10:20 p. Apr 5, 2021 · How to create a vector to show the electric field direction in the results? Posted Apr 5, 2021, 8:16 a. 2 0 Replies Apr 7, 2020 · Hello, I'm still very inexperienced using Comsol. EDT Results & Visualization, Studies & Solvers Version 5. Ex)^2+(es. PDT. Right click on Electric field (in Model Builder list) and go to the Arrow surface. And I am trying to get the electric field along the sawtooth. 3) To get the correct field you need to add to your model the electrodes: draw thin (you can take 0. I need to get the RMS value of the electric field, this value does not vary with time, is the same for all moments. The Polarization plot includes polarization ellipses for each diffraction order. When the far-field domain is used in physics, additional radiation pattern plots are available by default if the study is run for the first time. I had chosen electric current or electrostatics as my physics interface. We can also use the global 1D plot of ewfd. I tried to do something in 2D, but I can't find way how to define which plane I want (xy,yz or zx). Dec 7, 2012 · I am performing simulations of a three-phase cable in the interface electrostatic (es), and have an interest in obtaining the electric field distribution in the cable, as the simulation is time dependent, the COMSOL informs me the value of the electric field for each instant of time which I set, so I can plot various surfaces of the electric field, one for each time step. Use a Contour plot to visualize a scalar quantity as a contour in 2D or 3D and display the quantity as a set of colored lines. 2, after using another in-house 3D FEA package for quite sometime. Posted Apr 1, 2019, 1:55 p. By taking the dot product with a vectorial field, you can compute and plot the components of that field normal and tangential to a curve: V. If you don't already have a line in your model where you would need one, create a "cut line" in post processing, and then you can then create conventional (classic cartesian) plots with very easily readable axes and numbers. In particular, we don't want to reconstruct the photodiode but simply to say to comsol that a spherical wave of initial amplitude E0 note starts from a given surface. Generating an Electric Field Arrow Plot in 3D Arrow plots are available in three dimensions. 1 and 2D you can draw two circles (lets say more or less concentric), one inside the other, then if you go past the "FINISH" line these two geometrical OBJECTS are united and split automatically into two "ENTITIES" domain 1 & 2 with two boundaries one internal one and one external one (note on circles boundaries are often split into arcs of 1/4 circle, I consider these as "one Jan 31, 2022 · Hello everyone, I am new in comsol. For instance, the far-field pattern of the conical antenna looks like this: After computation, some default plots are generated. . As you say, I entered a complex expression of incident electric field of circular polarization, which is expressed as E0x=1, E0y=i, E0z=0 in COMSOL, and the polarization state of transmitted electric field is same. The Graphics window shows a surface plot of the calculated electric potential. I am currently using the MEF physics module and am getting the magnetic field plots as expected. Jan 25, 2016 · To see how the electric field varies in time (as a function of phase) you can choose to animate the arrow plot (add an animation->player under the export node, point it to the desired plot group and use "dynamic data extension" for sequence type). In this tutorial, towers transmitting high voltage three-phase AC power are modeled, and the resulting electric field is computed. Note that “V1” and all other parameters may be functions of the spatial coordinates and of the solution (V) and its spatial derivatives. Now enter the coordinates to make the line, press "plot" at the top to see if the line is where you want it. Sep 21, 2022 · Slice plots are great for visualization, but if you need numbers, it is better to plot quantities at points or along lines. It should in general not be used to excite a model. Jul 5, 2022 · The surface plot is for the Z-component of power flow, and the black arrows represent the electric field. Nov 29, 2010 · have a look at plot group 2. Ez)? E0 is the value in V/m you set for the exciting port? Or it is a vector? And in this case, which is its expression? Sep 9, 2013 · Then right-click on that plot group and choose Streamline. Can anyone help me, please? I want to compute and plot the electric field intensity and the equipotential surfaces produced by two parallel plates at their midway and at a point closer to any one of the plates (if it's possible to simulate at points of our own choice). The selected quantity has a constant value on these contour lines, optionally with a 3D height for 2D contours. EST RF & Microwave Engineering, Modeling Tools & Definitions, Parameters, Variables, & Functions, Results & Visualization 0 Replies Susan Daly Arrow plots are available in three dimensions. 2) Can Comsol plot the electric field in such a way it shows the "dome-shaped" electrical field? Please refer to the attachment to see an example of "dome-shaped" electrical field. You can easily plot them using an Arrow Line plot. Stationary, and frequency-domain modeling are supported in 2D and 3D. I also found one good option. Feb 4, 2011 · Hi in 4. As the equation suggests, the boundary condition only guarantees that the tangential components of E and E 0 are equal. May 26, 2014 · Right-click 3D Plot Group 4 and choose More Plots > Far Field. 4. E expressed without components is the emw. what physics / study would be required for this. 297 The Electric Currents (ec) interface (), under the AC/DC>Electric Fields and Currents branch when adding a physics interface, is used to compute electric field, current, and potential distributions in conducting media under conditions where inductive effects are negligible; that is, when the skin depth is much larger than the studied device. Also I had defined the boundary for electric potential and ground. Best regards, Jeff Apr 12, 2011 · hi, i made the plot of electric field between two spheres surrounded by air. Comsol uses Ex, Ey, and Ez for the components of the E field. The RMS value is the square root of the arithmetic average of the squared values of the electric field at each instant of time. 2 f ( r ) [1] The Electrostatics (es) interface (), found under the AC/DC>Electric Fields and Currents branch when adding a physics interface, is used to compute the electric field, electric displacement field, and potential distributions in dielectrics under conditions where the electric charge distribution is explicitly prescribed. Ex/Ey/Ez results do not appear to be just the induced field as I'm needing. Apr 16, 2010 · Since electric field is a vector field, what generally seems more meaningful to me is to specify the gradient of various components of electric field. Ey)^2+(es. However, by dividing the x coordinate /c_const doesn't make much difference in the plot. The upper one has a potential of +V and the lower -V. COMSOL, the COMSOL logo, COMSOL Multiphysics, COMSOL Desktop, COMSOL Server, and About the Magnetic and Electric Field Interface Boundary Conditions . You can display the vector quantity of interest to you in 3D domains, on surfaces, or on lines through Arrow Volume, Arrow Surface, and Arrow Line plots; respectively. Then, left-click the 1D Plot group, and in "data set", select "Line plot 1". , its vector magnitude, which is the Aug 8, 2017 · where “nD” is the normal electric displacement field and V is the electric potential on the surface of the thin dielectric layer with permittivity “epsilon” and thickness “d”. m. (tr, tz) is the tangential vector. If by "electric field norm," you are simply referring to the customary norm of the electric field, then for a typical time-domain study, the field would be real (as opposed to complex) and so its norm would simply be its absolute value (i. The geometry I am using has a sawtooth boundary. Jun 17, 2012 · 1) How can I plot the electric field gradient ∇|E2|? Its unit is (V2/m3). Aug 5, 2021 · In a 2D axisymmetric model, the vector with components (nr, nz) is normal to curves. n=Vrnr+Vznz, etc. In contrast to the plots just shown, a far-field plot describes a wave pattern (electromagnetic or acoustic) at distances far from the source. 2 0 Replies Jordan Dargert Jul 10, 2012 · I have results for Electric field enhacement in some points of the geometry, so I found the frequency of maximum enhacement. I have included an example. The select or enter the variable values appropriately. Jan 24, 2011 · Hi! 1) First try Electrostatics (es) physics. Oct 2, 2016 · Similarly, you could also plot these quantities in the 3D Plot Group or 2D Plot Group. For example, 2D Plot Group (Right Click) -> More Plots -> Max/Min Surface. Plotting the Far Field. Electric potential: From the Results node, select the child node named Electric Potential (es). Feb 25, 2020 · Hi, I am a new user to COMSOL. normE? Or the sum of the three components (emw. The imaginary part could be plotted by entering “imag(Er*exp(-j*rev1phi))”. It seems that "Cut Line 2D" can only be used for a straight line. A far-field calculation behaves as if the antenna is very far away and so gives a wide view that shows both the direction and the intensity of the radiating energy. Apr 4, 2021 · There may be important details in your model that could be involved, so I encourage you to upload it to the forum. normE^2) in space for that particular frequency (2D or 3D, whatever). Choosing normalized arrows for the electric field will also make it look more like what you are expecting. The goal is to see the shape of the field at each resonance of the cavity, within a certain window. I want to see the electric field enhancement in the form of E/Eo or (E/Eo)2 to eliminate the influence of incident field. In the result I could view the Multislice Electric potential. 01m, for example) cylindrical electrodes with radius equal to radius of your coloumn on the bottom and on the top of the coloumn. Aug 4, 2016 · I want to insert the time step size and the final time for simulation. The towers have two shielding lines. For the gradient, change the x and y component just like the 2D example above and then change "es. As with the surface plot we created in the slots, we want to know how strong the electric field is and how it changes. Draw plot of Emax/Eavg vs distance. I don't get what expression use for this plot. Ey+emw. Apr 27, 2011 · I'd like the gradient of the electric field. So far as I see, the equation of gradE you specify is just the 'norm' of the gradient of electric field's 'norm' :) If this is the quantity that interests you in the specific circumstance you are Nov 17, 2014 · When I'm processing results, say plotting 2D surface plots, COMSOL provides a list of expressions it can evaluate. Nov 4, 2021 · hey, i am brand new to comsol and need some help. Aug 16, 2024 · I am using an x-polarized negative z-propagated plane wave as my background electric field. neff with w_core*ewfd. but one thing I've been able to do before, was plot the electric field across a line. In that case, I don't think Ex would be the spatial derivative. 3 Replies Last Post Nov 4, 2021, 4:10 p. My structure is a box consisting of an air domain (top) and cancer domain (below). Now I want to plot Electric field distribution (emw. Sep 11, 2013 · I wanted to visualize how the electric field lines develop between oppositely charged electrodes of various shapes. However, the mef. Unfortunately, I am not familiar with how to apply it. I then plot the electric field norm on the multislice, and the electric field and magnetic flux density as arrow volumes. e. Their normal components might deviate depending on specific situations. for 2D: I made simple 2 rectangle of electrodes (copper )with a circle of air around it and then used physics Electrostatics (es) and gave potential to copper rectangels and I get beautiful results of electric field distribution in 2D. A plot of the electric field norm is generated by default upon computing an optical model. 3 1 Reply Naema Othman Default Polarization plots are automatically generated for Periodic ports in 3D and in 2D, if the Electric field components for setting in the Components section for the physics interface is set to Three-component vector. You can also use filled contours to create a kind of a surface plot with color banding. EDT RF & Microwave Engineering, Wave Optics 3 Replies Rui Vasconcelos Dec 31, 2013 · The plot of the radial component of the electric field is shown below. Annotations are used for highlighting the effective mode index and propagation constant. Ez)^2,z)". Ex+emw. 4 | ELECTRIC FIELD FROM POWER LINES Results The electric field norm from the wires at ground level is shown Figure 2, along with streamlines showing the direction of the electric field, Figure 2: The electric field norm (surface) and the electric field (streamlines) from the transmission lines. For my thesis I need to observe the propagation of the electric field emitted by an UVC led. Application Library path: ACDC_Module/Devices Mar 8, 2015 · I modeled graphene in COMSOL to excite SPP using a point source, I used a circle above graphene surface as a point source. Watch this video to find out how to create an Arrow plot and learn about the several options available for this plot type. 4 3 Replies Jun 20, 2017 · plotting electric fields Posted Jun 20, 2017, 5:41 p. COMSOL Multiphysics is a finite element package that can be used to solve a partial differential equation such as for example Poisson’s equation as we discussed in EMT. i am interested to draw a graph between the electric field magnitude at various points along the y axis. Please help me how to plot such relationship and anyother ones Thanks Aug 28, 2023 · I'm relatively new to COMSOL and trying to plot the induced electric field of a spiral coil driven with an AC current. But I got trouble when I tried to define the Data Sets. The model also illustrates the strength of using the boundary element method (BEM) for modeling, which is used by the Electrostatics, Boundary Elements physics interface. But that doesn't affect how to plot the Some of the plot types featured include Volume, Surface, and Line plots, which are used to show result quantities on volumes, boundaries, and edges; Arrow plots, which are used to display vector quantities; Slice plots, for viewing quantities on slices within 3D domains; Contour and Isosurface plots, which display scalar quantities and fields Feb 2, 2015 · Below is a polar plot describing the near-field pattern changing with the elevation angle, $\theta$: Far-Field Plots. Any advice? Mar 9, 2022 · While the potential is a scalar, the electric field is a vector quantity, so you can't plot it with a surface plot (though you could plot its norm, or any other scalar quantity derived from its components); consider using an arrow plot or a streamline plot. 2) Use Stationary solver. You have to add two plots: One for the vector quantity of E and one for the scalar quantity of the magnitude of E. May 13, 2015 · Hey all, I really need your help in the plots of Electric field simulation. Introduction. This is equivalent to entering “real(Er*exp(-j*rev1phi))”. EDT RF & Microwave Engineering Version 4. 2 to get the electric field. Mar 5, 2014 · Today’s blog post demonstrates how to compute and plot the gradients of the magnetic field in electromagnetic simulations in the COMSOL Multiphysics® software. Oct 28, 2022 · in many papers, they plot electric field distribution as |E/E0|^2. Jul 18, 2022 · Hello Feridun, Create a Cut Point 3D dataset corresponding to the desired point, then use an Arrow Point plot based on that dataset. Ez" to "d((es. The Magnetic and Electric Fields (mef) interface (), found under the AC/DC>Electromagnetic Fields>Vector Formulations branch when adding a physics interface, is used to compute magnetic field and current distributions when the exciting current is driven by an applied voltage. But how do I know what these are exactly? What, for example, is being plotted when I select emw. Oct 4, 2021 · I have successfully run several frequency domain studies on it, using coaxial cables as input ports. Well, I am interested in TM mode so I used electric field on circle with only x and y components and z is zero. Sep 4, 2012 · This expression represents the magnitude of the electric field, which varies for each instant of time. normE (electric field norm). However, what I want is a broken line. Electric Field of a Charged Sphere. Feb 9, 2021 · I modulled a geometry using Electromagnetic Waves, Frequency Domain in COMSOL 5. what i need to do is plot the electric field intensity of the 2d structure varing spatially in y . Like for example, from t=0 to t=100 s, how the e-field is varying with time along that path (red line). I used scattering boundary conditions. Using these Jan 24, 2011 · Hi! 1) First try Electrostatics (es) physics. I am trying to plot this transmitted electric field with circular polarization state, but I can only find the "expression", such as specifies the tangential component of the electric field. EST RF & Microwave Engineering, Heat Transfer & Phase Change, Results & Visualization Version 5. Btw: I changed the physics somewhat, because your model didn't solve. I wanted to plot the relationship between the arc length and the electric field distribution as shown in the figure below. In Feb 12, 2014 · I want to compute the electric field intensity and plot the equipotential surfaces produced by two cylindrical conductors of radius “r” installed horizontally and separated a distance “d”. 3 1 Reply Naema Othman May 3, 2012 · I've recently been using Comsol 4. Suitable plots are a slice for the scalar field and volume arrows for the vector field. Best, Jeff-----Jeff Hiller Oct 30, 2012 · how to plot the electric field y- component Posted Oct 30, 2012, 3:44 p. The plates are separated by a distance “d”. EST Low-Frequency Electromagnetics, Microfluidics Version 3. You should also find "arrow volume" and "arrow surface" plots to be helpful in visualizing fields. Apr 1, 2019 · Plot electric field for a grating structure with finite periods. You will find the electric field is then one of the ready-to-use quantities for those Oct 30, 2012 · how to plot the electric field y- component Posted Oct 30, 2012, 3:44 p. The Reset default plots of the study node also creates them. All the reflection, transmission and field plots are good. zgaca uvvohpn vtomng uakll zxjz czubq fix qkjblt pdghjs hlpm