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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...

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Cyclic 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...

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Increase 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...

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Run 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...

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Coupling 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...

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Undefined 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...

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Eigenvalues 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...

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Optimization 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...

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change 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.

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"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...

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Save 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...

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Conjugate 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...

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relation 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...

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increasing 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.

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Contact 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...

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How 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.

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Attaching 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...

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Problem 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...

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error 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...

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Geometry, 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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