Starting simulations automatically via waiting list
Hi, does someone know if it's possible to start more than one simulation at once? Is there something like a waiting list on which I can put different models and then Comsol starts the second job...
View ArticleSimulation error
Hi , I am getting this type of error whey i am trying to start simulation. "Variables property does not include all variables in Xmesh" Could anybody can give me any solution/ suggestion. Thank you...
View ArticleCFD from stationary to time dipendent
I built a model of pipe in axialsymmetric configuration, with internal laminar flow of water with pre-determinate velocity. The water flow, during its pass, are heating by resistor, simulated as heat...
View ArticleLaminar flow in vertical pipe
Hi, I'm trying to do a simple model of laminar flow in a vertical pipe. The model is coming out fine before I add gravity, but when I add gravity via a Volume force of -9810 N/m^3 in the y direction I...
View ArticleMicrostructure design
While computing, I have got an error which was mentioned like: "The following feature has encountered a problem. - Feature: compile equations: stationary(sol1/st1) - Error: Duplicate variable name....
View ArticleGeometry Modification
Hi, I just want to know if there is an easy way for geometry modification in comsol. For example if I have done some simulation on a plate with a hole in it, and then I want to repeat the simulation on...
View ArticleMagnetic field
what does this expression mean and what does it do? mf.Forcez_Force_1 Thank you
View ArticleDealing with Periodic Boundary Conditions, PMLs and interfaces.
Hello, I'm trying to simulate a nanoparticle array over a substrate in order to study its extinction cross-section. To do so I've made a cell with periodic boundary conditions on the sides and two PMLs...
View ArticleGaussian focused beam, 4.2a
Dear All, I have issue. I have silver block on the glass. I want to illuminate it from the bottom (so light first propagate through the glass), but I want to illuminate it with Gauss focused beam (I do...
View ArticleModelling of infinite large seabed (with COMSOL 4.3)
Hi I'm conducting thermal calculations on a cable in the seabed (with COMSOL 4.3) using the Heat transfer module. I am modelling the seabed as a big square wherein the cable is placed. The upper...
View ArticleHow to avoid preordering in direct solvers
When Comsol solves the linear system Ax=B it applies an algorithm to reduce the bandwidth of the matrix A. Does someone know how to prevent this to happen? I'm using LiveLink and of course I'm aware...
View ArticleJob option in Batch command
Hi all, I add trouble when using the batch command recently. I prepared one file with a parametric study (different amplitudes are used in a time dependent problem). I didn't try yet the -pname and...
View ArticleWhere is the maximum (or minimum)?
Hello. Does anyone know how to find (not only represent) the coordinates of the max (min) value of a variable, for instance in 3D? I mean, when one plots 'Max/Min Volume' (in a 3D Plot Group / More...
View ArticleUsing deformation results as initial conditions for the next study
Hi all, I have a linear elastic model with a stationary study whereby I apply a boundary load and deform the model domain - this is simple and works fine. Next, I would like to use the deformed results...
View Articleparametric sweep with charged particle tracing
Hello, i have 2 studies in my model: 1) A study that calculates electric and magnetic fields 2) A study that calculates charged particle tracing only with the fields from 1) now i would like to...
View ArticleEquilibrium condition for an identity pair
Hi. I am new in COMSOL and I am checking for the software abilities. Currently I am using the identity pair in a mass transfer model. The idea is a fluid flowing on the surface of a slab, which is...
View ArticleBreakdown voltage of parallel capacitor.
Hi there. I am designing a simulation of the breakdown voltage of a parallel capacitor. So what I'm trying to figure out is, how the easiest way to to this is. For starters I guess it could be...
View Articlemagnetic field -problem with mesh in a frequency domain study
Hello, I have some convergence problem in my 3D study. I build a geophisycal magnetotelluric model, a stratified earth (layers at different electrical conductivity ). I will measure the impadance at...
View ArticleAccess to a function value in matlab
Hi, I am running a comsol model through matlab. This comsol model has a function El(t) that returns an output based on the value of t. I would like to have the results of this function stored in a...
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