1D and 2D phononic crystals
Note: I am doing this project as my "learn-something-new-during-lockdown" affort. So, you are free to suggest me whatever could be interesting. However, I am planning to get a good publication in this...
View ArticleProgress window not showing up during Matlab Livelink (COMSOL 5.5)
Using the ModelUtil.showProgress(true) command is not showing the progress window when I'm running COMSOL models from Matlab through Livelink on my Windows 10 system. I'm interested to know if anyone...
View Articlehow to deal with penestration during contact
Hi, coworkers! I have modeled a capacitance sensor with 1 top electrode and 4 bottom electrodes (Fig 1). The sensor is placed on a substrate, and a stick is going to contact and press it from the top....
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Problem with gradients, wetted wall
Hello to all! I have a problem with gradients. My goal is to simulate wetting of a cylinder (1st picture). The red wall is the wetted wall. The dotted line is the axis of symmetry. Unfortunately, I...
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Pressure attenuation in cylindrical pipes problem
Hello to all!I am trying to simulate the pressure attenuation in cylindical pipes. I was expecting to get results similar to the analytical expression, but they are way too different.The analytical...
View ArticlePerfect Electrical Conductor Problem
I'm having a problem where when I draw a geometry all of the boundaries are automatically selected as perfect electrical conductors and I can't change this. I've been trying to follow along with the RF...
View ArticleInduction heating, Solver gets stuck in middle. Does not converge. Can...
Hello I am trying to Induction heating and basically I gave a coil which is straight with a current applied to the coil to heat up a tool below. But the solver does not converge. I have attached the...
View ArticleThe optimal load and voltage value are too large
I want to study how the voltage changes as the load increases. But the result I got is very different from the actual value, the voltage value is much larger than the value obtained during the...
View ArticleMulti turn numeric coil
Hi,I'm trying to calculate the magnetic field due to two pairs of orthogonal coils one pair is circular and there are no issues. the other is a rectangular pair and I'm not able to get the homogonized...
View ArticleCombining Electric currents and Electrostatics
My Problem:I have a condensator with a small non-conducting dielectric wire in between.I try to get out how a conductive shell around the wire shields the electric field in the wire.I tried electric...
View ArticleHow are the data points chose in a Line Plot?
Hello!Checking the reference for the Line Markes in a Line Plot, I found that the setting "In data points" under Coloring and Style ->Line Markers would give me the values at the mesh nodes....
View ArticleCOMSOL plots with wrong time step
Hello.I have written 0.025 s as time step but comsol plots every 0.1 s. How can i fix it? The study has been running more than 24 hours i can't re-do it easily.While solving I had a probe ploting...
View ArticleImplementing periodic BC to moving mesh method
Dear friends, hi, I have a two phase flow problem including a bubble and I am using moving mesh method. I want to apply periodic BC to the top and bottom of my computational domain. Every thing is Ok...
View ArticleSet starting point for stationary study comsol
I am using ht in solids and fluids coupled with laminar flow. I started stationary study, and i saw that in first iteration Temperature of probe 1 and probe 2 are 215 degC and 205degC. I knew that they...
View Articletwo mirror cavity by simulating one mirror, cavity length?
Hi everybody,I am trying to simulate an open microwave cavity with two mirrors and get the eigenmodes and q-factors similar to the "Fabry-Perot application". I ve seen in publications that people...
View ArticleSimulate polarization and depolarization current (PDC) test in COMSOL
I want to simulate PDC test using Comsol for my final project. But I didn't find any tutorial or reference on how to do that. Anyone can help me?
View ArticleHeat transfer in solids boundary conditions
Hi, I am trying to model the time dependent thermal diffusion in a solid with the Heat Transer in Solids physics. It works well, except for the boundary conditions. The heat source is only active...
View ArticleImporting STL file made in SOLIDWORKS
I have imported a file in Solidworks and saved it as a STL to be used in Comsol 5.4 however when importing the geometry changed as shown below.The COMSOL I use doesn't have a CAD import module which...
View ArticleWater flow in a canal
Hello to all the community. I am new to using this Software, and I need to simulate the flow of water in a canal. The water must cool the channel (it absorbs heat). I was thinking of using a conjugate...
View ArticleResuming a simulation from a previous run at a time the solver could not...
I was running a simulation a 2D axisymmetric plasma DC discharge. Unfortunately, after 2 days of ruuning, at one of the time intervals, the simulation stopped with the following error:"Nonlinear solver...
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