Shallow water waves model in coefficient PDE or general PDE
Dear All, I want to solve the Shallow water waves equations in PDE module in 2D. h is the water elevation, U and V the velocity components along x and y. How can I implement an incoming pulse in the...
View ArticleParticle Selection
Hello, I running a simulation to release particle in an electric field and observe their tracks. I wish to find out how many particle and how fast they reach a certain boundary. I have been able to...
View ArticleHow to use compressible gas flow .
Hi I am trying to find a module for doing the analysis of a gas flow in a little 2-d chamber where I am using a compressible gas at a predefined pressure from a tank ranging from 3-6 psi-g at the inlet...
View Articlecomsol element reference and theory manual
Dear all, Depending on the module that is selected, the elements are selected automatically also I guess. I have several questions related to this proposition if that is right, namely, + Is there a...
View ArticleInterrupt studi
Hello. I am new to COMSOL and I want to ask how to interrupt study in some condition and change the parameters of the model? Thank you. Goodbye.
View ArticleMulti turn coil problem (frequency domain)
Hello, I want to calculatate the magnetic flux density of numeric multiturn coil domain. I conducted the tutorial mode"multiturn coil asymmetric conductor". After I conducted that model, I build my...
View ArticleFourier's law
Hi, I would like to check the following Fourier equation: φ =-λ.grad (T) in this simple modele. My model consists of two concentric cylinders separated by a gas gap. A power density (Q) is placed in...
View ArticleOutliers in parametric sweep results
Hi, I'm modelling an eddy current testing probe with the AC/DC module. So far the model basically consists of a transmitter coil, an aluminum plate test specimen, and a receiver coil. I'm using COMSOL...
View ArticleCapacitive sensor - coupling with circuit
Hello, I build a small model of a capacitive sensor (small conducting plate). An electric dipole serves as the source of an electric field. The field induces a surface current density at the sensor...
View ArticleChanging S parameters
I am calculating and then plotting the reflection and transmission coefficients [abs(S11)^2 and abs(S21)^2] for a plasmonic wire grating structure using the RF module. Initially I set the ports at a...
View ArticleWavelengths seen in 2D plots
I am simulating the intereaction of EM radiation with a plasmonic element. I have set up the study to parametize the wavelength of the incoming radiation from 4 um to 20 um. In looking at the fields in...
View Articleconstant volume while deforming one boundary
Hello everyone Does anyone know how to implement a zero volume change constraint on a 2D geometry with one surface deforming? I am using ALE interface and I am prescribing a mesh displacement on one...
View ArticleTriphasic Material - Confined Compression
Hi, I have been using Comsol for 2 years now, for the past few weeks I have been trying to implement a mechano-electrochemical model, also know as the triphasic model to study the effects of mechanical...
View Article"zero length" element
I am trying to model a bolt connection in an assembly. In order to do so I would like to place a node at the center of where the bolt hole should be (all bolt hole cutouts have been eliminated) and...
View ArticleAbsorbing boundary for acoustics
Dear all. I am trying to simulate a acoustics wave propagating through the air. The absorbing boundary that I set is "Matched Boundary". Is this a correct setting? The result went weird when the...
View ArticleWork on COMSOL through MATLAB?
Hi, I would like to run COMSOL through MATLAB but don't understand how? For example when I have saved a COMSOL simulation as M-file and tries to open it in MATLAB it won't open and I am not sure how to...
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 ArticleImporting real data heat flux boundary condition to COMSOL
Hello all, I'm working on a 2D transient heat transfer project and I can't figure out how to import real data for heat flux vs.time in COMSOL. It only allow me to input a fix value or function, not...
View Articlecomsol 4.2a with matlab R2011a
Hi, I saved the comsol file in matlab as told. The tutorial says open ''COMSOL with MATLAB''. What does that mean? Also i get an error as follows when i run the m file of the comsol model. Undefined...
View ArticleCreep - Plasticity
I want to use the non-linear structural mechanics module for simulation of plastic deformation by yielding. There is a creep module and a plasticity module. In the creep module, I find more suitable...
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