Recoverable error in residual, but solver could not recover.
Recoverable error in residual, but solver could not recover. What is the meaning of this error ?
View ArticleInduction Heating 3-D simulation in COMSOL 4.2
Hello, I'm trying to simulate the Induction Heating in 3-D simulation. Could you please tell me the components of Induction Heating (such as: Sufface Current, Ampere's Law, External Sufface Current...
View Articlelarger ICP model causing problems - singularity error
Hey, I am using your thermal_plasma model as a basis to my model. It is almost the same. The only difference is that in my model the tube is straight (not curved) and longer (0.8 m). These are the...
View ArticleCan I use COMSOL to solve integral equations?
Dear all, I have some integral equation to solve. Can I do that with COMSOL or I always need to change it to PDE? Thanks a lot!
View ArticleRuntime of plasma simulation
Dear Sir, We have some test results as stated below after so many attempts on reducing runtime of plasma module for simulating a chamber with CCP type. a. We tested several cases (such as argon_gec_icp...
View ArticleFluid flow with a moving solid object/hole
Hello, I would like to model the airflow in a room occupied with people, and to allow the people (cylinders) to move around in the room. Is this possible in COMSOL? For a silly example in 2D: I have a...
View Articlethe unit of volume flow
Dear sir or madam, I have a problem about the unit of volume flow. I know the standard liters per minute (slm) is widely used in industry. So do we use this unit in comsol? For example, if I give 20...
View Articlewhat type of physic that i should use?
as-salam and good evening.. my name is azman and I really need your help.. I got an assignment which is need me to calculate electric field when applying 5kHz high frequency 10.0kV to the electrode. i...
View ArticleWarning: Parametric solver does not support geometry and mesh dependent...
Dear all, I want to sweep a parameter, but the geometry and mesh depend on the parameter. Then I get the warning message Parametric solver does not support geometry and mesh dependent parameters. I...
View ArticleReflection/transmission spectra of a free standing Ag film with periodic hole...
Hi, I want to use COMSOL 4.3a to simulate the reflection and transmission spectra of a free standing Ag film with periodic hole arrays. There is an error " Failed to find a solution for the initial...
View ArticleAnisotropic Magnetoresistance
Hi! I need to simulate an AMR sensor, which is a magnetometer, whose working principle is based on the Anisotropic Magnetoresistance. The sensor is made of a thin strip of permalloy, a ferromagnetic...
View ArticleDefinition of a flux
Hello everyone, I've a little problem with the definition of my flux, in fact I used the rectangle function to make my flux periodic but after the computing, when I draw my flux (flux in function of...
View ArticleThermal energy problem
Hi, In the attached 3D model model I am investigating fundamental thermodynamic physics (usually I do that to understand/check how COMSOL handles the physics before I gonna apply it to my complicated...
View ArticleSolving a 3rd order polynomial
Good day, When using the Distributed Algebraic Equation physics, is there a way to solve a higher order polynomial for a variable and be able to acquire all of its roots/solutions simultaneously and be...
View ArticleContact problem. Static vs Dynamic
I have an impact model; steel presses down soft tissue. I can solve this model in static analysis with prescribed displacement. But when I solved the model in dynamic analysis with prescribed velocity,...
View Articlemembranes coupled with air
I am trying to model the coupled modes of a musical drum with two heads. I need a membrane under tension at either end of a cylindrical shell of air. I can do it with solid shells at either end of the...
View Articlelocal coordinates and material anisotropy
Hi, I am trying to build a 3D heat transfer model of a machine stator coil. As the bulk material is anisotropic i would like to keep the anisotropy consistent around the bends of the coil. This would...
View ArticleChange boundary conditions during a transient solution
Hello, in an acousitc transient simulation, I would like to change a boundary condition during the simulation. I would to impose on this boundary: 1. a pressure condition during the 100 first time...
View ArticleHow to assign a 2D random function as porous matrix property (porosity)
Good morning, I really need your help, because I can't find anything in the help files. I have a model using the the Brinkman Equations module for 2 dimensional porous media flow. I want the porosity...
View ArticleSector symmetry on a 1/5 3D electro motor
Hi All, i have a 3D model that shows only 1/5 of whole motor. It has 3 phase and 5 pool pairs. i'm using rotary machinery modul 3D. if i disabled all continuity BC on the outer slice surface, it...
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