Coupling Stationary study -> Time dependent does not work
Dear all, I have a very simple model (attached): a 2D model where I impose an initial strain, that generates stress. This stress will be relaxed by creep. The stress caused by imposed strain is...
View ArticleDerivative of a dependent variable
Hello, I am using the values of a dependent variable 'phi' and its derivative in Matlab. For some reason, the numbers of nodes are different between the original dependent variable and its derivative....
View ArticleRing of varying width
Hello, I'm trying to build a ring that has a nominal radius but whose width (thickness) varies as a function of the angle phi around the ring. I've created a cylindrical coordinate system but can't...
View ArticleRing of varying width
Hello, I'm trying to build a ring that has a nominal radius but whose width (thickness) varies as a function of the angle phi around the ring. I've created a cylindrical coordinate system but can't...
View ArticleHow to export high quality images when exporting images sequence
Hello Everyone, I am using COMSOL 4.3b and I do know it is possible to acquire images with somewhat higher quality using the "Snap shot" button but that only takes one image. I am wondering if it is...
View ArticleHow to deal with Contact problems, Adhesion!!
Hello Everyone, I am dealing with the topics of contact mechanics and adhesion. In my case, two surfaces are adhered strongly and I would like to model the detachment of contact or treat it as a crack...
View ArticleTime dependent adaptive mesh refinement output is on every mesh refinement ->...
Hi, I am evaluating the use of Comsol Plasma Module for the simulation of streamer propagation. The nature of the problem requires the use of adaptive mesh refinement in time. It seems that Comsol...
View ArticleSolving multiple modules simultaneously.
As the subject states, I am trying to solve two modules simultaneously. The model is of two electrodes with a solution above them. One module is a partial differential equation in place of...
View ArticlePeriodic Inflow
Dear friends I like to know how can we define inlet as attachment, imagine we have a channel, flow has different velocity at different height, it's like step, for example if height is 10cm: from h=0 to...
View ArticleUnresponsive and slow
Dear Comsol developers, I am experiencing slow response when selecting 1D plot group and/or export nodes. It appears that Comsol is calculating the plot every time I select the node, which completely...
View ArticleUse stop condition in solver
Hi, I want to know how to use stop condition for time period in solver parameters and write a stop condition? I am using a COMSOL V 3.5. Thanks in advanced. Vinay Patel.
View ArticleResults no longer visible (heating of granular materials in 3D)
Hello COMSOL Users and Experts (Especially Josh of Altasim/Nagi Elabassi) I am trying to simulate the heating of granular materials in 3D. One study with a fewer grain and the other one with more...
View ArticleModeling anisotropic Material
hi, i need to model a system (a sphere with a dipole in its centre), the model exhibits anisotropic conductivity. i.e. the radial value of electrical conductivity sigma is 10 times less than its...
View ArticleTracking Residual
I need to track the residual in my simulation in order to represent how closely the governing equations are being represented. I know comsol keeps track of residual since ive had several errors...
View ArticleStreamline along a line or plane
I have a 3D model of a system of permanent magnets and am trying to obtain a streamline of magnetic flux density along specific planes in my model. In the settings for a streamline plot there is an...
View ArticleCreep - Plasticity
I want to use the non-linear structural mechanics module for simulation of plastic deformation by yielding. There is a creep module and a plasticity module. In the creep module, I find more suitable...
View Articlewhat's different between 'frequency domain' and 'frequency domain,...
Hello guys I'm simulating a cantilever sensor, which contains three modules, 'laminar flow', 'electric currents', and 'particle tracing in fluid flow'. For this, in electric currents module, AC...
View ArticleHow to change colour scale bar width?
Hello, I am using COMSOL 4.2a and when I export post processing image then the scale bar in the image is very thin and almost invisible at the same time the range of values is also not visible. So I...
View ArticleSimulating a rheometer
Hi Everyone, I'm a bit new to Comsol so sorry if this is a dumb question. I'm trying to simulate a rheometer in my lab. It's basically a cone in a petri dish. For simplicity I'm using 2-D and have...
View ArticleQuestion about model ID:9408
Dear Friends, I was checking model id 9408, it's vibrating beam in fluid flow, my questions: 1- I like to have Sine vibration for beam, I replaced point load in this model that it'a Gaussian pulse with...
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