"No frame is defined for 0D applications"
Hello again. I am trying to simulate an E-core transformer. When I click the study 1 and select the show default solver there is an error occurs "No frame is defined for 0D applications" . What is it...
View ArticleSurface impedance
Hello everyone, I want to plot the surface impedance of my simulation. Can I do it in COMSOL? How I do it? Thanks Gustavo
View ArticleError Jacobi with user-defined function
I defined a function in Global Definition to describe the graded-index. However, when I used the Solve-Modal Analysis, the COMSOL popped a window to warn error in Jacobi matrix. Plus, I suppose my...
View Articlebiosensor
hi sir,i am currently working on microcantilever beam based biosensor,and i want to know about the piezoelectric module and how to incorporate BC in microcantilever,
View ArticleHow to Improve Convergence in Natural Convection
I am wondering how I can improve convergence in my natural convection model. It is a simple model; an isothermal aluminum plate in water. The model starts out fine but as the run continues (transient...
View ArticleComsol doesn't keep initial values
Hi Now, I work on a Comsol model describing a spouted bed apparatus (spouted bed is a kind of fluidized bed, when the apparatus has a conical bottom). I use Comsol 4.3 with Euler-Euler model, laminar...
View ArticleProperties of model
Hey. How can I check the properties of the model object? For example, the current in the coil, or the radius of the circle, the properties of the materials. Thank you.
View ArticleProblems related to relative tolerance and relative error
Hello I want to reproduce a model in which there are two spheres in contact one upon the other along the z axis, and then i has applied two forces, one on the top (point or boundary region of the...
View ArticleThe relative error is greater than the relative tolerance..Error!!!
Iam a newbie to comsol. And Iam learning comsol for my research. I simulated my first simulation and I got the below mentioned errors. Failed to find a solution. The relative error (4.6e+004) is...
View ArticleLimiting simulations-Dynamic Pull-in Cantilever
Hi everyone, I have a quick question, Can I tell comsol to simulate till it reaches some theoretical value and the stop? I mean, what I'm trying to do is Simulate the dynamic behaviour of a cantilever...
View ArticleGeometric nonlinearity
Hi, I have used structural mechanics to simulate an indenting sphere on a half space polymer film. I am changing the elastic modulus of the polymer film to go from hard material to soft material. I am...
View ArticleHEAT TRANSFER IN A BITUMEN TANKER
Hi, I am a new Comsol modeler and I am trying to model a steel tanker filled with molten bitumen. The tanker is insulated and the bitumen is heated by two propane burners ( in form of U) located at the...
View ArticleCreating a region with a constant gradient field
I want to create a region of air with a static magnetic field in the z direction that has a constant slope (gradient) in that direction as well, for example H(x,y,z)=(0,0,1+z/10). Once I have this, I'm...
View ArticlePDE solving or defining force in terms of displacement
Hi, I hope you are doing well, I am a new user of Comsol. At this moment, I am trying to model a cantilever beam with an applied force on its edge as a function of displacement. So, what I need is...
View ArticleThermal expansion of a liquid
Hi all, I’m am trying to produce a model of a fluid enclosed on all sides except one by fixed constraints(walls), on the remaining face a thin diaphragm is in contact with the fluid. As such this is a...
View ArticleGas Pipe Flow
Hello , I have a simple question. What module should I use to simulate a gas flow in a pipe.Something like the Pipeline Insulation in the Model Library but with a gas. Thanks,
View ArticleHEAT TRANSFER IN A BITUMEN TANKER
I am trying to model a steel tanker filled with molten bitumen. The tanker is insulated and the bitumen is heated by two propane burners ( in form of U) located at the bottom. For the bitumen I have...
View ArticleCall For Papers
We are pleased to invite you to present your work at the COMSOL Conference 2013. The user oral and poster presentations at the Conference highlight achievements in multiphysics modeling and simulations...
View ArticleHow to get final dimensions i.e. outer profile in COMSOL?
Dear friends i want a help in this part. Here, i'm explaining the full problem. # i got the co ordinates of a biological part from image analysis in MATLAB . I plotted those points in the COMSOL (...
View ArticleUnable to create mesh : Error Free Tetrahedral 1
Hi everybody, I am having this error when I try to mesh a 3D structure : The following features have problems : Features : Free Tetrahedral 1 I don't find a way to have more information about this...
View Article