rigid particle carried by a channel flow
Hi I have to simulate the displacement and rotation of a rigid prticule in a fluid flow and I am not a professional on comsol. So, is there anyone who could help me? or if you have any examples of this...
View ArticlePleasse help me.
Good day. Would somebody be so kind as to send me a model ID 14191? Thank veri much. goodbye
View Articlesimple solidmechanics
Hi I have a simple model that a piston presses down brain tissue. The piston moves with a prescribed displacement. A problem is that the piston always moved the same distance, even I have changed...
View Articlefind the coordinates of a point in which the magnitude of derived variable at...
Hello, I am working on a 2D transient problem. I have the results and want to post processing them. I want to plot my results like this: Detect the minimum of a derived variable all over the domain at...
View ArticleModelling a Lumped Capacitor in COMSOL (Frequency Domain EM simulation)
Hello, I am trying to critically couple a resonator to a microstrip transmission line using a lumped coupling capacitor. Does anyone know how I can do this in COMSOL. I know it is possible in HFSS. Can...
View ArticleOscillating electric dipole source Comsol RF module
Dear All, I have question. I do simulations of plasmonic gap nanoantennas, and I want to excite antenna with dipole source which is placed and oscillate in the middle of the gap. I have questions....
View ArticleConstitutiveRelationD error
Everyone, I am trying to add an external current density domain to my electric current (EC) simulation. However, when I try, it says that there is some sort of "ConstitutiveRelationD" error. Has anyone...
View ArticleDye oscillator, please help
Hello! I model Dye oscillator ( rspa.royalsocietypublishing.or...tent/155/886/498.full.pdf+html ) in Comsol. The frequency of a ring oscillator is supposed to be the wave speed through the quartz =...
View ArticleSimple example to solve ODE
Hi, I am a complete newbie with COMSOL (I have the MultiPhysics module, version 4.3a), and I have only followed some initial tutorial examples in the manual (e.g. "the wrench"). However, as I...
View ArticleInitial negative concentrations
HI All, I am trying to simulate a A+B-->C chemical reaction. I dont know why my reactants (A and B) concentration is going negative. How do I fix this? I have attached my model as well as pic of the...
View ArticleArray of blocks in a helical fashion
I have a sample rectangular block which should be repeated along a helix. I have created a spline curve for the helix. Sweeping a face of the block along the curve creates a helix with rectangular...
View ArticleWhy Iron magnetic flux density becomes more than iron saturation limit...
Hi, I am modelling a linear electromagnet motor and in my magnetic flux density surface plot, I noticed that Iron flux density goes up as high as to 3 Tesla! How is that possible? Iron saturation level...
View ArticleCAD Import solver problem
Good afternoon, I wanted to use the magnetic brake model on a different shape than a disc. I imported an object from CATIA. Unfortunately, we I run the model, it says:“Feature: Stationary Solver 1...
View ArticlePrincipal stress arrow versus cone
Hi, I'm trying to plot my principal stresses (sigma 1 and sigma 3) as cones instead of arrows (which do not look nice for geological purpose). The black cones on comsol3.5 were pointing inward for...
View ArticleCantilever Beam Rotation Measurement
Hello, I recently have developed a model of a cantilevered magnetorheological elastomer (MRE) that bends when a magnetic field is applied perpendicular to the magnetization of the MRE. I was wondering...
View ArticleThermal stress analysis
Hey everybody, I want to model the "L" shape geometry and see the thermal effects on it. As I am very new in the FEA field I need to be sure that I am doing it write. The model is attached and I just...
View ArticleElectric Field / Potential distribution
Dear all, I am trying to simulate a structure which consists of different material layers. I would like to see Electric field and Electric Potential distributions of a certain potential applied to the...
View ArticleHow can we merge the different graphs (Two graph) in COM SOL?
Hi I work with comsol 4.3 AD/DC model( electric current), i have one problem in merge or combine two different model electric filed graph in one sheet. i attach my graph. How to combine it's. Please...
View Articlehow to find change in position of a point with change in load on a cantilever...
Hello, I'm a learner of comsol. i want to find change in lattice constant of a Photonic crystal structure which is made on the free end of a cantilever structure. I did simulation and i got point graph...
View ArticleUsing a final result of a model as an intial domain condition for another model
HI. I am currently modeling a normalizing process in COMSOL 2D after a carburizing process. I would like to know is there a way to save a final result (concentration profile) of the carbruizing model...
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