How to solve COMSOL error, " dependent variables are not coupled "?
Hello. I am trying to model a 3D co planar waveguide and I am basing my model on the 2D version that is done in the following link:I followed the 2D model step by step making no major changes, yet when...
View ArticleCalculating Energy in a Layered Shell
I have a model which includes a layered shell on the face of a rectangular prism. For each of the eigenmodes I need to integrate the energy in bulk and shear deformation in the solid and in the shell....
View ArticleDiffusion-Advection
Hi, I am using Comsol 5.3a. At the moment using Darcy as well as transport of dilute species modulus by coupling these two equations . I am doing parametric study from small range of diffusion...
View ArticleModeling of SAW filter
As for SAW filter, I am a novice. Can you provide me with a model of SAW filter? I want to learn about it.
View ArticleTry eigenfrequency analysis by LMS and MBD
Hello,While I am trying a 1dof example to test the eigenfrequency analysis by LMS and MBD, I feel really confused that I have one model passed but with another failed which have all the parameters same...
View ArticleInterpolation function with cylindrical coordinates
Hi everyone! I am trying to implement a Custom surface charge on a cylinder in my comsol Model. I'm having a file with cylindrical coordinates %r ,%phi,%a and a Value which is giving the charge and I...
View ArticleMode Analysis, Eigenfrequency, and Frequency-Domain Modal
Hello,I am working with comsol 4.4, and I know I can use the mode analysis to get the modes of a waveguide or a resonant cavity. However, I wanted to perform a mode analysis of a patch antenna to get...
View ArticleProblem with meshing
I am using COMSOL for modelling the movement of the surface water. Figures are attached. My input data is in the form of topographic points, with X, Y and Z, and I am using 2D modelling (figure 1). The...
View ArticleHow to get maxop1(T,x) to return one value in time-dependent problem?
Hello,I have a 3D time-dependent heat transfer model and I am trying to find the location of the maximum temperature.I have defined the coupling operator maxop1 in the Definitions tab under Component....
View ArticleMositure absorption in desiccant
hi, i am trying to simulate absorption of moisture in aqueous solution of Licl (mass fraction of LiCl in range of 0.3-0.4). it would be great if i can get some help in adding aqueous LICL as material...
View ArticleWhat is the physical meaning of scaling factor in PML setting?
Hi all,I am currently using pml to absorb light to prevent back refletion. In my simple model, I incident the light by using a port to a mirror (using perfect electric conductor BC), and let the...
View Article"Error: Cannot evaluate expression." in AC Capacitor introductory example
Hello,I am just starting out using COMSOL, so I am using this tutorial, and others, to help me get acquainted with the software. Everything goes OK until I get to the "Global Evaluation 1" and "Global...
View Articlemicrofluidic
hi I want to model a Y-micromixer with uniform magnetic field? in down inlet is ferrofluid, Can someone tell me how can I simulate it and couple magnetic field from down side ?Regards
View Articlecontours circular domain
I´m modeling a crushing pipe test and i model it as 2D plain stress. The test consists of loading the pipe according to its upper generatrix and the support is materialized in two lower generatrices...
View ArticleBoundary conditions
I want to apply gaussian heat flux to A 2-D heat transfer in solid problem. Actually I am looking to do simulation of crater formed during micro Electron Discharge Machining. How can I proceed?
View ArticlePintwise periodic boundary condition
Hi I want to model a cube with periodic boundary conditions and uniaxial tension. I need to apply the following equation as boundary conditions to each two surfaces. For example for the right and left...
View ArticleParticles are not falling down under gravity rather they are following a...
hi, im using particle tracing with fluid flow coupled with single phase laminar flow, here my base fluid is air and particles are given density of 2200kg/m3. I ran the simulations by switching on the...
View ArticleModel converges below a certain physical dimension size
Hi,I'm trying to make a 2-D model of an electrolysis cellwith fluid flow into a 3-D model. All the model parameters remain the same only a depth to the model is added to make it 3-D. If the model is...
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Different Result ! Boundary surface and cut-plane
I have a simple T-junction micro-mixerGeometery: 200*200 micrometer - lenght 2.7 mm Concentration Contour at outlet boundary using "surface" : Concentration Contour at outlet boundary using "cut-plan"...
View ArticleOffset function beam
Hi everyone. I would like to know if there is a function OFFSET BEAM in comsol.Enrico
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