parametric sweep
hi, can we use geometry parameter like (length, width, height) in parametric sweep, i want to see how the output changes with variation in geometry
View ArticlePyramid
I know this sound stupid but really hope someone can help me with this.. this is my first time using this software. I've been trying to draw the attached truncated pyramid. but really dont know how to...
View ArticlePorts: Oblique excitation
Hello, I am trying to excite a port which is based on top of my model at the XY plane. It needs to be polarised in the x-direction. I want to tilt it with an angle with respect the X to Z axis. I use...
View Articlecubic bezier curve
Hello! I have some problems in a project: In the geometry I attached to this message I designed a part of tensile test sample to simulate the stress and strain in the sample. Between the upper, broader...
View ArticlePiezoelectric Device 3D
I'm a quite new user in Comsol, and I have some doubts about the Piezoelectric Devices (pzd) Module. I have built a model with 2 ceramic rings (see the model in the attached file), that are suposed to...
View ArticleSolution isn't converging
Hello everyone, I'm having a problem with my simulation, where it isn't converging. It's a very thin plate (10 nm) of graphene, and the dimensions of it are around 0,5 um. I've made a simulation where...
View ArticleGeometry of a cylinder
Hello! I am a beginner in COMSOL and i would like to ask you about the dimensions of a cylinder in 3D! In my model i have to design two cylinders with the next dimensions: the first one with radius =...
View ArticleVisco-hyperelastic model
Hi, I need to implement a viscoelastic material model in Comsol for a Stretch Blow Molding simulation. The model is a modified Christensen-Yang Visco-Hyperelastic constitutive law. It should be...
View ArticleMaterial Properties - Solid vs. Non-Solid Domain Type
In the Material Settings tab, under Material Properties, there is an option to select "Solid" or "Non-solid" for the material type. What is that "domain type" referring to, the phase of the material...
View ArticleVelocity gradient expression in 2D-axisymmetric
Hello, the velocity gradient tensor for a 2D-axisymmetric problem presents, for the phiphi component, the following expression chns.graduDGphiphi = if(abs(r)<0.0010*h,d(u,r),u/r) does anyone know...
View Articletime dependent boundary conditions
hello all.. i am solving a time dependent heat transfer problem.. at the start ,for a rectangular domain boundaries 1 and 2 are insulated and 3 and 4 are assigned with constant temperature.. after some...
View ArticlePoission's ratio problem related to Structural Mechnics
Dear all, I just started to learn COMSOL and tried to conduct a simple simulation of deformation of an elastic plate by a face load. I used Solid Mechanics model in 4.3 edtion. 1. When I set the...
View ArticleStop condition in Electromechanics(emi)
I would like to implement a stop condition similar to what is described for a moving mesh problem. The parametric study would stop when the mesh quality is lower than a certain value, inorder to...
View ArticleMagnetic Force on an armature
Hello I'm dealing with a very simple problem that has been very frustrating for me! I would appreciate if any one can assist me with that. I'm modeling an E-shaped core in 2D magnetic field module. It...
View ArticleMeshing and convergence problems
Dear Comsolians, I was finally able to draw the problem in 3D in Comsol :), am also a beginner, lol. The way I have modeled the coils is that they do not form a complete closed loop, thus I assigned...
View ArticleCoupling Surface Charge Density from Electrostatics to Electrical Circuit
Hi, I have made a model of a varying overlap capacitor with an electric potential on one side as an electret. It seems to work with just ES and ALE but once I add in CIR and set the top electrodes as...
View Articlecurved beam
Hi, How can I change the radius of curvature of a reinforced concrete straight beam inorder to come up with a curved beam?
View Articlesimply supported beam
Hi, How do i define the constraints for a simply supported reinforced concrete beam which has both truss and solid mechanics elements. Do I use boundary conditions or edge conditions
View ArticleModeling Capacitor with Electric Currents
Hi, So I am trying to model a parallel plate capacitor with a variable overlap between the plates. Going through the ACDC models in COMSOL, I don't really understand how using electric currents can be...
View ArticleSimple Contact Mechanics Problem
Hi All, I have been struggling a little with trying to implement a contact mechanics. I am modelling indentation of a hybrid polymer base layer in 2D. The polymer base layer is a combination of two...
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