Cannot change units of dependent variable and Source Term (Domain ODE and DAE)
Hi,I set these units in the model myself, and cannot revert them! Also tried inserting a new "domain ODE and DAE" interface to the model and these are deactivated there as well.Cannot seem to...
View ArticleRoller problem
Im trying to simulate the deformation under stress of a part I designed. It has an simple roller which i try to simulate by giving it a roller or symmetry condition. But this results in very high...
View ArticleTranslating comsol version 5.4 to 5.3
Hi my University utilises two different versions for comsol 5.4 and 5.3. However they only have Matlab live link with version 5.3 but I have done all my work with 5.4. Is they a way to translate a file...
View ArticleHow to count the number of values greater than a certain constant in a field...
In Comsol, is it possible to count the number of values of a field variable greater than a certain constant at each iteration step, just like it can be done in Matlab by 'Number=sum(U>U_const)'.All...
View ArticleTwo phase flow analysis
Hey everyone,I am a master's student in molecular biology and genetics. I would like to model a two phase fluid flow system but I am not sure where to start. So basically I have a simple channel model...
View ArticleAuxiliary sweep return same results
Hi! I am using comsol to run a simulation for a silicon-based mems capacitive force sensor.I have included the solid mechanics and electrostatic physics to solve for a stationary study.I am using an...
View ArticlePort boundary condition
Hi,I am modeling a straight duct with rectangular cross section. I have one inlet and one outlet. and I am using acoustic pressure to model the acoustic field inside the duct. I am applying port...
View ArticleBeam Orientation (structural mechanics)
Hi, I modeling my structural building, but I've a problem beam orientation. With Section Orientation, I don't solve. I attached the problem, I modeling two cases.
View Articleabout numerical port in Electromagnetic wave simulation
The below post is related to an archived discussion[start here] Hi,We find we can set numerical port in Electromagetive wave physics boundary setting. We are interested in Numerical port setting. But...
View ArticleModelling of 2DEG in HEMT
Hi, I want to understand how to include all the physicsl models of spontaneous and piezoelectric polarization to create 2-Dimensional Electron Gas (2DEG) at the interface of an AlGaN/GaN or AlGaAs/GaAs...
View Articlehow to set insulation in Electrostatic field simulation
I want to simulate the Electrostatic field, there are three part in my model: copper, ceramic(insulator part) and vacuum; i set the three parts as a union using form a union; but in the result, the...
View ArticleAutocad import for plane geometry
Dear,I am having problems importing a autocad dxf file into Comsol. I am using Autocad 2019, but also saving into 2013 format does not seem te work. I also check if there were multiple layers, but...
View ArticleProblems exporting data
Hi, I'm using the coefficient form PDE (stationary) node to solve a problem of photon migration through turbid media. I have one light source that changes its position, and for that I'm using the...
View ArticleComsol livelink + optimizer, error rebuilding geometry
Hello everybody,i use an imported solidworks geometry in comsol to optimize parameters. Due to 3D-sketches with splines, solidworks sometimes crashes when varying the length of an spline. Which is a...
View ArticleHow to use thermodynamic systems to draw phase diagrams?
In Comsol, is it possible to use thermodynamic systems to draw phase diagrams (phase envelopes) for certain species (e.g., CO2, N2, etc.)? And how to execute the process? Can someone give some...
View ArticleWhat are the steps of modelling Laser keyhole welding ?
I have applied heat source using COMSOL software. Now, I have read many papers but don't know what is next step to make the keyhole in my workpiece. As of now, I am just trying to model the basic laser...
View ArticleFind the parameter value by using the optimization function in COMSOL
Hi, I have modelled an electrical cable with copper conductor and PVC insulation. I have added the physics of heat flow in soilds with magnetic fields. i have added the Frequency-Stationary study in my...
View ArticleMass flow balancing
Hello I am new to the tool COMSOL. I am trying to get acquainted with the tool and trying to run a basic simulaiton for mass balancing for which I have taken a LAMINAR FLOW physics and STATIONARY...
View ArticleMesh statistics
how do i get the number of nodes in my mesh statistics section in acpr acoustic module
View Article