Surface plots in a log scale
Hi thereI am generating a 2D surface plot of the velocity magnitude. I have small regions with very high velocity magnitude compared with the remainder of the plot. This means I have small regions of...
View ArticleTemperature Distribution in a Vacuum Flask with a Matlab problem
hello,guys, I'm learning from a case study，but I meet a problem,when i click Compute,it shows a error:Multiphysics compilation error.Can not start Matlab,- Library: csmatlab.dll could you teach how can...
View ArticleThe size of PZT-5H transducer
Hi everyone,I have been wondering if the size of PZT-5H transducer in my ultrasound modelling will affect the wave propagation or ultrasound behaviours. If yes, is there any reasons causing that to...
View ArticleHow do I edit equation in COMSOL Multiphysics?
I am using COMSOL Multiphysics 4.3a. I want to simplify the Helmholtz equation in "Pressure acoustics". How can I make some variable (Monopole and Dipole source item etc) value zero to simplify it? I...
View ArticleProblem with Interpolation (Comsol 5.3a)
Dear all,this simulation model interpolates a data from a file which plots refractive index and voltage. It is able to import the file but when I start to run the model, it fails. I think there is a...
View ArticleImplementing custom boundary heat source with local x coordinate
I want to insert a custom boundary heat source which depends on position x along an edge.I have two questions on how to implement this:How can I create a local x coordinate along this edge? Something...
View ArticleTotal enthalpy calculation
Hello I´m simulating a system where I want to know the inlet specific entalphy, the fluid is water so Cp=4186 J/kg*K. With the boundary probe Comsol gives me the values I´m looking for but I want to be...
View ArticleAdd piezo-resistive coefficient in doped channel for MOSFET
Hi,I am simulating the Ids current in a MOSFET. I want to see the Ids current change on application of mechanical stress. For that, I wanted to add the π-44 piezo-resistive coefficient of the doped...
View ArticleMemory usage increase with looped LiveLink for MATLAB
Question: How can I eliminate the LiveLink for MATLAB server from storing "things" in my computer memory when I run it?Situation: I am working on simulating li-ion battery at different conditions using...
View Articlecombine solutions (stitch solutions)
The below post is related to an archived discussionCombine solutions / stitch solutions / join solutionshttps://www.comsol.com/blogs/how-to-manage-multiple-solutions-in-comsol-multiphysics/
View ArticleModeling heat transfer and fluid flow in a greenhouse using evaporative...
I am currently on a capstone project in which we are designing a greenhouse specifically for Hawaiian or tropcial climates. We currently have a proposed design but I am having trouble modeling it...
View Article2D model of a Phosphoric Acid Fuel Cell
I'm trying to make a 2D model of a Phosphoric Acid Fuel Cell. For the physics part I'm using electroanalysis by adding cyclic voltammetry for the study. I've used the same parameters as the one in...
View Articlehow to couple two different physics
Hello.I'm trying to simulate and get result about how EHD Inks are changed by electric currents. I already downloaded example(inkjet.mph) from this...
View ArticleLong setup time before initial time step for study for model with large...
I have a model with over 2400 probes, and it takes about 4 hours before it starts taking the initial time step for the study. I created a simpler model with varying number of probes and logged the time...
View ArticleNovel Solar Concentration System
Hello EveryoneI'm doing my thesis paper , the title of my thesis is optimization of novel solar concentration system . I'm a new user for comsol , and actually I need a strong support for working on...
View ArticleProblems of Integration of magnetic field and electric field computation in...
Hi there,There are two problems that we can not address when simulations. Could anyone please help check and figure ways out?Question #1: How to integrate electric and magnetic field computation in...
View ArticleCreating an Air Geometry inside a structure
Hi! I'd like to model air between the comb fingers of my structure. So far I have tried making a sphere, assigning it the property of air, and then placing my structure inside it, and then use the...
View ArticleTrying to build Trimorph
Hello,I am trying to buuild trimorph but in bimorpph it is not giving me any solution. As i am new to comsol so kind of stuck in this situation. All i just to want to calculate the resonance frequency...
View ArticleBuckling Analysis of Composite Plate
Hello everyone,I have been tried unixal buckling analyisis of composite plate( for comparasion of Ansys results). But I guess failed some reason about boundary conditions, every time. In my scneraio,...
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