Error in Meshing and computing
Hi all, I'm working in the wave optics->EM waves, beam envelope module, in 3D. Attached is the geometry of the model I'm trying to use. It's based on 2 of the comsol models available - directional...
View ArticleCyclic Dependencies in an AR coating
Hi all, I am currently working on modeling an antireflection coating by building a model based off of the Plasmonic Wire Grating tutorial. I have attached the model, so I'll skip over the particulars...
View ArticleIncrease in "no.of Degrees of freedom"
I am trying to run the "rail gun" tutorial from version 3.5a on version 4.3. I am facing the problem of increase in computing time in version 4.3. 1) When I just import the tutorial and run it on both...
View ArticleRun Comsol Matlab using multi processors
Hi folks, I have a question about running Comsol Matlab using multi processors. I have a 3D application that involves turbulent air flow and mass transfer. My Comsol is installed on a cluster. For now...
View ArticleCoupling Solid-Beam in a Time-dependent simulation
Hi I am working with a simplified railway model. I wish to couple a beam with the 3D model structure of the rail and to apply a moving (depends on time) force on a surface, by means of the command...
View ArticleUndefined value found error.
Hai , Can anyone help me to resolve this error while solving solid structural mechanics problem, What is NaN/Inf ? Error Message : Undefined value found. - Detail: Undefined value found in the equation...
View ArticleEigenvalues from different study steps
Hi everyone, I am trying to calculate an overlap integral between two modes of different origin -- a common problem of electrooptics or optomechanics. So I have two physics interfaces (say...
View ArticleOptimization solver
Hi community I have a question in regard to the optimization solver i am using in my model. In the "Optimization Solver" window (Study -> Optimization), under "Solution:" i have an option to select...
View Articlechange in thermal conductivity with respect to temperature
Hello, Is it possible to simulate a case wherein, the thermal conductivity of the material changes with respect to the temperarture ? Please let me know.
View Article"Segregated solver steps do not involve all components."
Hi everyone, I hope if this has been answered before that someone can direct me to the thread. I am trying to solve a very simple system (attached) using electrostatics and solid mechanics. The...
View ArticleSave a log file on each iteration step with parametric sweep.
Hi, In COMSOL 3.5a I can run parametric sweep over parameter “A” and write a global variable (“B” for instance) into a log file during calculation. With each iteration step I have an updated log file...
View ArticleConjugate heat transfer, Control Volume
Hi everybody, I'm trying to model heat transfer by convection using the conjugate heat transfer node. For doing this I need to model a control volume to represent the domain of the surrounding air. As...
View Articlerelation between two sudy
hi all, i created a model of piezoelectric device in piezoelectric module,now i want to transfer it to electromagnetic wave module because i need S parameters(that aren't in piezoelectric answers)but...
View Articleincreasing number of Charge and discharge cycle
How do I increase or decrease the number of charge and discharge cycle. It would be a really great help if somebody would help me, thanks.
View ArticleContact Modeling in Stationary a Study
I am trying to create a simulation of two layers of hyperelastic material (a dense polymer and a foam layer) under compression. The layers are not bonded together, but they are in contact. Both...
View ArticleHow to increase number of charge and discharge Cycle in comsol.
How do I increase or decrease the number of charge and discharge cycle. It would be a really great help if somebody would help me, Thanks.
View ArticleAttaching Probes to Solver
Hallo, I am currently trying to created a coupled simulation consisting of the electrostatic module with a stationary solver and the diluted species transport module with a time dependent solver. Using...
View ArticleProblem with Neumann boundary condition definition
Hi, I am simulating a Helmholtz equation (using the PDE mode module) with a Neumann boundary condition. Some days ago, we decided to update our Comsol version from 3.4 to 4.0. In the new version we...
View Articleerror message when define interpolating function in matlab (other function...
Hello everybody, whenever I define an interpolation function in matlab with model.func.create('int1', 'Interpolation'); I get an error message (see below) - but if I write instead...
View ArticleGeometry, Meshing, CFD Fluid Flow, Extrusion, Open Curves, and Solids
Hello, First, I am completely new to such simulation, have never used Pro/E, Solid Works, etc. Next, I am modeling turbulent fluid flow through a jet boat droop snoot and nozzle with proprietary...
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