Array 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 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...
View ArticleMagnetic-structural coupled analysis, result not good
This is part of my thesis. I'm trying to simulate the magneto-structural coupled analysis on a magnetic gear. The attached file is a picture of my result. The cylinder consists of permanent magnets and...
View ArticleV4.3a ---How to set coordinate System in Piezoelectric Devices-quartz oscillator
Hi, everybody! Recently,I study quartz oscillator,I reffered the example(thickness_shear_quartz_oscillator.mph),In this example,the document writed : The crystal axes used to define material properties...
View ArticleThermoelectric Effect - Adding the physics
Hello, I'm working in a project on thermoelectric generator. As 'Thermoelectric' physics interface,is not in the physics area/physics list, I was trying to add the physics using the steps given in the...
View ArticleTwo interdependent studies - but I cannot use results from frequency domain...
Dear all, How can I use the result from a parametric (parameter 'b') sweep-frequency domain study (e.g. emw.Ez(b) ) in another function defined under Definitions (e.g. f(emw.Ez(b)) ) which is used as...
View ArticleContact problem in solid mechanic: sover don't convert
Hello! I want to simulate a screw in a boneblock which is bonded with a force vertical to the screw axis (see picture). The two blocks are a union with differend materials. There are used 3 different...
View Articlestress tensor-elasticity matrix
COMSOL assumes the elasticity matrix to be symmetric. I need to define an unsymmetric stress tensor but seems that it is impossible in COMSOL. Has anyone experienced such a problem so far? Thanks
View ArticleFlipping time when accessing Study 1 solution in Study 2
I'm trying to solve a time dependent optimal control problem in Comsol 4.3. The problem takes the form of (g) two coupled nonlinear parabolic PDEs for the states (g2) two coupled nonlinear parabolic...
View ArticleHow can COMSOL AC/DC module simulate a Current Source?
How can COMSOL AC/DC module simulate a Current Source? As it is described in Wikipedia, "A current source is an electronic circuit that delivers or absorbs an electric current which is independent of...
View Articleelectric field and potential distribution
Hi I have been working on a 3D (AC/DC) model of a insulator, and I am trying to verify the uniform potential and field distribution along the insulator surface. I apply 33Kv voltage at HV end and other...
View Article2D Beam Calculations - Parameter THICKNESS and defining the force
Hi, i just found the parameter THICKNESS D in the physics solid mechanics window. By now i worked with a 2D Model to explain laminate behaviour and reduced my loads to a lineload N/m for a small area....
View ArticleElectrostatics and Transport of dilute species
Hi all, I am modelling a pn junction using the coupled electrostatic and transport of dilute species physics module for weeks now without any success. I followed the model in tutorial provided on...
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