Comsol 4.2a Requirements
Dear All, I want to buy new computer with which I want to do simulations around 700 000 - 1000 000 number of degrees of freedom. I of course thought about desktop PC, i7 processor, 24 GB work memory....
View ArticleDisplay time-dependent solutions in units of years?
How can I display (in a legend for a plot to be specific) my chosen solutions in different units than seconds? I am dealing with thousands of yeras, and a legend with entries like 9.46728e11 is not...
View ArticleIncomplete instruction for Model Library example (Sliding Wedge)
Hello, I'm trying to create a model from Model Library, using only pdf instruction. The model is Sliding Wedge (Structural Mechanics Module/Contact and Friction/sliding_wedge). The problem is, that a...
View ArticleDifferentials ux and external functions
DEar all, I haven't found any answer in the external function section of the user's guide for what appears to be a really simple question. I need to create an external function which will simply...
View Articleabbreviations for physical parameters
Dear all; I am learning comsol for specific models and found a potential of comsol for the models. But, I am not sure how to input diverse physical parameters such as strain rate in the equation. For...
View ArticleUnits not considered
Hi I define a constant NA with units cm^-3 and a function f(x) = NA*exp(-(x/k)^2), where 'x' and 'k' are in meters making the units of f(x) essentially cm^-3. However, in the variables list, where I...
View ArticleLoad in movement
Hi all, Is there any way to simulate a LOAD MOVING along the boundaries of my object (2D)...so I can see how it deforms as the load passes? Im using the solid mechanics module--> BOUNDARY LOAD??...
View ArticleBending loss in PCF
I want to find out bending loss in PCF using COMSOL 4.2 software. How i will get bending loss from this software. Samiul
View ArticleCurrent Density Plot with EC physics
Hello, I'm very new to comsol and was wondering if one is able to plot the electric current between two plates through a liquid (conductive) solution. I've been looking at the busbar example and see...
View ArticleHow to draw a parabolic shaped solid?
Hi there, I am trying to draw a parabolic shaped solid to present an AFM tip. I can draw a parabolic curve in 2D using the paramatric curve function. Then I can do revolve of the prabolic curve....
View ArticleDiode example solved but strange
Hi I tried to solve the semiconductor diode example from the model library but simplifying it a bit. In particular, I discarded the rounded corner and just made it a text book like pn-junction. It...
View ArticleTotal Mass of a Structure
Hello, I was wondering how to extract the total mass of system. I have solids model of a beam and a beam model of a beam. I wanted to compare their total masses to each other. Any help would be greatly...
View ArticleAbout applying fixed constraint in Structural Mechanics
Dear All, I currently encountered a problem of using fixed constraint. Basically, in my model, fixed constraint is applied on part of a surface. This is how the structure was fixed and held in reality....
View ArticleRegarding inverted mesh elements
Hi all, We were doing simulation on eddy current damping pendulum,.While solving the equations ,we got the error message that inverted mesh elements were found. How to avoid this?? can anyone tell us...
View ArticleTriaxial Test
I have studied the triaxial test example, "axisymetric" case, which is CU (Consolidated Undrained).This means no variation of pore pressure in the soil. And, how to proceed if one needs to take account...
View Articlehow to understand the code of comsol in matlab editor.
how can i understand the code of programme that is developed with the help of COMSOL and saved as m file and now it is obtained in COMSOL MATLAB editor. how to get to know the curve it shows belongs to...
View ArticleMulticomponent multiphase flow
I am currently simulating a model in which the two carrier phases involved are water and toluene and the diffusing components are acetone and methyl isopropyl ketone (MIPK). This problem is to be...
View ArticleModeling aluminum plate heating
Hi. I am lost and need some help. I need to modeling the following case: The heating suffer by an aluminum plate that it is illuminated by a lamp formed by a matrix of 7x7 leds with a total power of 49...
View ArticleModeling an acoustic t-junction
Hello, I am currently trying to model an acoustic t-junction with the frequency domain acoustic pressure module. But while the 3D simulation gives me reasonable results I only get nonsense from the 2D...
View ArticleDefining constraint
Hello friends, I would really appreciate some help in defining a constraint. I am trying to solve a system of PDEs but the result at the earlier times keep overshooting the expected value. The maximum...
View Article
