Failure to find a solution
Hi. Im chandra Im getting Error Like Failed to find a solution. Maximum number of Newton iterations reached. Returned solution is not converged. This is the error im getting while executing the file...
View ArticleUsing Comsol with Live-link for matlab to get a jacobian matrix?
Hey there, I am currently working on a steady state resistivity/MMR problem, and Comsol has been great for a forward solver. I am wanting to do an inversion of data to get a model for the ground, and I...
View ArticleHow to set classpath from GUI, or use multiple classes
Hello, I am using a Windows 7, 64 bit machine. I believe that I have the same question as the person from this thread:www.comsol.com/community/forums/general/thread/41459 I developed a main.class file...
View ArticleLimiting simulations-Dynamic Pull-in Cantilever
Hi everyone, I have a quick question, Can I tell comsol to simulate till it reaches some theoretical value and the stop? I mean, what I'm trying to do is Simulate the dynamic behaviour of a cantilever...
View ArticleHow do I clear a default value
Hi I am trying to work through the Comsol 3D inductor model step by step but am stuck. It downloads with the setup for the frquency domain study. and I can't run the stationary study. I need to define...
View ArticleBand diagram of 3D periodic photonic crystals
Hi, I try to calculate band diagram for 3D photonic crystal using RF module (version 4.4). At first, for the sake of simplicity, I plot a cubic unit cell and set Floquet boundary conditions (3 pairs)....
View ArticleHow to define EM radiation due to local temperature (Fluctuation-Dissipation...
Hi, I am working on simulation of thermophotovoltaic cell, which is a PV cell illuminated by radiation emitted by a hot body. To simulate the PV cell I need to know the incident radiation from the...
View ArticleHow to define EM radiation due to local temperature (Fluctuation-Dissipation...
Hi, I am working on simulation of thermophotovoltaic cell, which is a PV cell illuminated by radiation emitted by a hot body. To simulate the PV cell I need to know the incident radiation from the...
View ArticleHow to define EM radiation due to local temperature (Fluctuation-Dissipation...
Hi, I am working on simulation of thermophotovoltaic cell, which is a PV cell illuminated by radiation emitted by a hot body. To simulate the PV cell I need to know the incident radiation from the...
View ArticleUndefined value found in the equation residual vector.
I am trying to model a pem fuel cell. Although I have entered all parameters and values, i have some errors as follows; Undefined value found. - Detail: Undefined value found in the equation residual...
View ArticleMax value of a field and its coordinates
Hello, I know that there have been a lot of posts about this topic and I have read many of them but I am still as dumb as before. I need to find the value of the maximum value of the field in a domain...
View Articlemembrane displacement with AC actuation/excitation
Hi all, I have a MEMS structure which is comparable to a parallel plate capacitor: The top membrane/plate is fixed at both end and free to bend up and down, while the bottom membrane/plate is fixed...
View ArticleElectrostatic Spring Softening in MEMS structures [ resonator Beams]
While I run "electromechanics" module for a MEMS resonator beam, I select "Prestressed analysis Eigenfrequency". Now my question is whether COMSOL considers the Electrostatic Spring Softening which...
View ArticleTransmition Coefficientof Electromagnetic Wave in Frequency Domain
Hi, I am doing a simulation of free space. My Comsol version is 4.1 My goal is to find transmission and reflection coefficients in order to determine phase of reflection or transmission. I know how to...
View ArticleCreep Relaxation: Convergence problem in time dependent solver
Hi everyone, I am doing structural analysis of a quarter spherical particle. I am imposing the Temperature field T(x,t) by importing a "text file" as interpolation. These temperature values are...
View Articleextinction coefficient
hello guys, I wanna calculate the extinction coefficient of a single gold nano particle or something. As my major is not related to RF calculation, I cannot obtain anything about extinction...
View ArticleTrichlorofluoromethane (Freon 11, CFC 11, R11 ... )
Hi, I'm calculating the propagation (both status, liquid and gas) of Freon11 in porous media. We built a very etherogeneous aquifer system and we have calibrated our Darcy Low physics in a previous...
View ArticleHow to make reliable domain selections in a parametric model?
Hello, I have created a model using the JAVA API. The whole model is fully parametric. If the parameters are changed reasonably, the topology does not change. The model contains named selections to set...
View ArticleChemistry in Mixture Model Interface
Hi, I have a simple model in which I am simulating sedimentation using the mixture model interface turbulent in a pipe. I am using solids dispersed in liquid. I input the solids volume fraction,...
View ArticleChange axis of symmetry in 2D axisymmetric models
When using 2D axisymmetric models, is there a way to change the horizontal axis to the axis of symmetry, instead of the vertical axis?
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