User manuals and Orthotropic material parameters
Hi,I am new to COMSOL and are looking for relevant user manuals (in this case for the solid / structural Mechanics module. Specifically I am looking for in depth manuals explaining the different...
View ArticlePipe erosion due to contaminant particles
Hi I am a newbie and I just came across the pipe erosion model in COMSOL. I wonder why the parameters include f, kappa, Hs and those. I try to delete these terms but the model can still be run. Can...
View ArticleUse of Normal Vectors
Hi all. After the really helpful response to my question about deforming domains I have a follow up question. The load I am applying to the deforming domain portion of the model is calculated using a...
View ArticleRandomly distribute inhomogeneous material properties in space from their...
Hi everyone,I'm working with the Li-ion Battery physics in 3D and for my problem, materials don't have constant homogenous properties (ex: conductivity, radius of particles, etc...) but heterogenous...
View ArticleUndefined variable error in Chemistry module
Hi, I'm modeling a heterogeneous surface reaction with the Chemistry module. For a reaction A(g) + S(ads) <=> A(ads) (where S denotes a surface site), the rate expression for A(g) must be equal...
View ArticleDiscrepancy between plate/shell/thin 3D solid
Hello, I am trying to do a very simple eigenfrequency analysis on a 17cm.17cm.25um plate. My material has E=4.95GPa, rho=1.38g/cm^3, nu=0.4. I tried using three different physics modules: - 2D plate...
View ArticleBatch Export Plots for Parametric Sweep
Hi all, I'm using COMSOL 5.3A and I have a model where I run a parametric sweep with two parameters. I'm wondering if there is a way to export my plot for each individual solution automatically (i.e....
View ArticleHow to define the material properities for the specific mesh element
Hello,all. I want to give specific material properties to specific mesh element. For example, create a cirlce in COMSOL, create material and mesh. Set the permittivity as 1 in material for the whole...
View ArticleHow to accumulate the solution of a parametric sweep?
I have a time dependent study of an Electrochemical machining process. I used a parametrics study to change a geometry "Nozzel location". I want to accomulate the results of each solution meaning i...
View ArticleHow to Model Liquid-Gas-Liquid interface via membrane ?
Hello!I am trying to model liquid-liquid membrane contactor for ammonia removal using absorbent. However, I have difficulties in modeling the membrane part!So I will have diluted ammonia concentration...
View ArticleHow to model a distribuited spring a 2D-model in Fsi module.
Hello everybodyI would like to create a model of two layers of fluid separated by a membrane, and I would like to impose a membrane's constitutive layer proportional to the difference between the...
View ArticleMATLAB+Comsol Colorbar scaling
Hi,I am trying to post process my surface plot with LiveLink. Everything seems to work I just couldn't find a way to scale my colorbar to the size of the picture so that the colorbar isn't 5 times as...
View ArticleRigid Wall / Basement Mechanical Constraint
Hello,it´s probably a ridiculous question, but I need a mechanical constraint just like an ideal rigid wall or basement which the DUT is unable to penetrate but is able to lift off it. A roller...
View ArticleModifying the stiffness matrix Element based by using Livelink
Hello,Can you tell me how can I modify the stiffness matrix element based by using Livelink? I want to modify the stiffness matrix and feed it to the code and then re-run the model.Thank you,
View ArticleAverage over smoothed data
Hello,I am calculating the average of some 2D data. If I understand correctly, Comsol calculates the integral of the raw data over the selected domain. However, when I plot the data on a surface plot,...
View ArticleCut-off wavelength of step index fiber
Hello all,I am trying to calculate the cut-off wavelength of SMF-28 in COMSOL. Could anybody suggest how to do it?Thank you,
View ArticleDefining a surface variable on a domain?
Hello, I'm attempting to define the reaction rate of a bulk species involved in an adsorption reaction in Transport of Diluted Species. I am also using Chemistry and Surface Reactions. I would like to...
View Article2D simulation on ZY plane
Hello, I would like to simulate piezoleectric stack of AlN with electrodes on top and and bottom. So, the d33 component of the AlN is what I am observing. However I want to simulate in 2D (not...
View ArticleTime Dependent Study over Months/Years
I am currently simulating the effects of thermal stress on an underground power cable and I was wondering if anyone would know how I could set the time of the study to be over months/years instead of...
View ArticleCOMSOL5.4a won't start on fresh Windows 10 installation
Hi, friends, When I installed comsol5.4 on my newly installed Windows10 operating system, I ran into the problem: 2020-03-28T12:47:31.486+08:00 Using locale: zh_CN 2020-03-28T12:47:31.982+08:00...
View Article