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parameter sweep error when loading a geometry

I am applying a load to the top of the geometry shown while the bottom is fixed but i keep getting an empty parameter sweep error can u help me??

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Fluid structure interaction and damping ratio

Hello, My model is a vascular cantilever beam (the first mode is pictured below). I work simultaneously on COMSOL and on my experiments. The channel is to be filled with a silicone fluid which will...

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Mathematical particle tracing: Diffuse scattering wall condition

In Comsol 4.3a the diffuse scattering boundary condition is incorrect. it generates an angular distribution with respect to the surface normal of cos(theta), while the correct distribution is...

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Cylinder section modelling

Hello all I wish to model structural mechanics in a section of a cylinder-like geometry consisting of longitudinal bars and radial rigid hoops supporting the bars. The full cylinder is too memory...

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Error linking Heat Transfer in Fluids and Turbulent Flow (Spalart-Allmaras)

I am using COMSOL Class Kit 4.1 to model a pretty simple flow of hot air in a vertical pipe. I was able to get the model to working using Laminar flow (all are steady state studies) and the Heat...

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COMSOL Error for Initial Values(RF Module)

I am defining a model with different concentrations of oil and water and trying to measure the heat distribution by using the microwaves. But I obtained the error mentioning Initial values: THE...

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Photonic crystal fiber

I am trying to model a photonic crystal fiber with liquid crystal filled holes.. I am a starter and it would be really helpful if any one can help me regarding the resources from where i can learn the...

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Thermal expansion model

I am trying to examine the stress distribution in a SiO2 film coated on a thick Si sample with a small Al bump on it, all heated to 700 K. I thought I built the model correctly, but the resulting...

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Finite Elements for Fluids P1+P1 P2+P1

Dear Comsol users, Comsol sets P1+P1 elements as default for laminar flow described by Navier-Stokes equations. As far as I know, theoretically, these elements are not good for such equations. Instead,...

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Voltage Induced in a Coil by Moving Magnet

Hi, I am trying to learn how to use moving mesh. And I created a project same as "Voltage Induced in a Coil by Moving Magnet", which can be found in Comsol website. But the problem is: when I run it,...

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Using a Gaussian Pulse

Hi everyone, I'm actuallay working on a modeling of a laser pulse which is heating a front of a material in order to determinate the diffusivity, my current issue is that i would like to model my heat...

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Store data at certain time intervals

How do I set up my model so the data are not stored at every time step, but at certain intervals. That way I don't end up with huge file, and my plot files for exporting are small as well. Thanks in...

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Why is the gradient of the voltage potential field not equal to the electric...

Hi, I have been working on a 3D model of a resistive current sensor, and I am trying to verify the high frequency (50-500Mhz) response. Essentially, i want to make sure that at a fixed current...

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managing plots

Is there a way to stop refreshing a plot? I mean, if you realize that you're plotting something wrong, can you give some command to stop the plot immediately? -- Mr. Ezio Cosatto Ansaldo Energia S.p.A....

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Mesh Swept Problem

Dear All, I need to reduce the elements of the mesh in the fluid domain. At the beginning I used a tetrahedral mesh but it is too dense in the axial direction, while I need it mainly in radial...

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How I can shrink or expand my simulation box?

Hi all, I have a simulation box to simulate a special form of the diffusion problem (I have my own PDE). I have only one field say density "ro" which varies during the simulation in the box. I want to...

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COMSOL Multiphysics 4.3b is now available

Hello COMSOL Community! Five new modules and a tremendous number of new features and enhancements are ready to be applied in your models and simulations. Release Highlights are available at...

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Fuel cell modelling - Electrolyte selectivity issue

I started to model a micro Direct Methanol Fuel Cell (DMFC) with the reference of existing PEMFC model given in the model library. I am using Comsol 4.2a. Since I designed my model as like as the given...

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Error: 2035 Edges are too close in 2D domain

I am simulating electric field distribution between two electrode that are spaced 250microns away. One of the electrodes have a thin dielectric layer (200nm) with a hole of 1micron diameter. I am...

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Point Evaluation using Biot-Savart Law.

Hello everyone, I am currently attempting to do a point evaluation with the expression for Biot-Savart Law. The set up is like this: I have an array of points that I would like to get the value at...

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