Frequency-transient Electromagnetic Heat Source & Heat Transfer with Phase...
I have created a coupled multiphysics model which refuses to solve. The model consists of a 2D periodic domain containing an EM wave incident onto a surface which uses the 'Heat Transfer with Phase...
View ArticleVariable error
Hi all, I'm running simulations involving EM fields and I'm facing this error as soon as I click on the study button: DUPLICATE VALUE 'FREQ' in CSCOMBOBOX 'pcontinuation' I attach the screenshot of the...
View Articletext corruption in Progress window
Hi all, I'm using comsol in Japanese version. Almost all windows can change characters correctly, but only progress window cannot change yet(see attached file). Probably, I should define environment...
View ArticleSegregated groups error
Hi I'm trying to simulate a microchannel of a methane steam reformer in COMSOL 4.3. The microchannel has 2 domains, a catalytic bed and a free flow. At first, I tried using 2 physics (Transport of...
View ArticleMagnetic field and Electric current physics problem at low frequency
Hi, I am working on a 3d hemisphere model coaxially centered between two multi turn coils (5cm apart). The whole model is surrounded with a sphere acting as both magnetic as well as electrical...
View ArticleHow to "intercept" transient solution at every time step
Hi all, I have a coupled set of PDEs that are being solved over time. At every time step, i need to check for a condition, and if it is satisfied (elementwise), raise a flag and start counting that...
View ArticleAxial flux BLDC Modelling in COMSOL
I want to run a simulation on axial flux permanent magnet DC motor. Can anyone suggest some tutorial on how to model it in COMSOL ?
View ArticleGeneral form PDE- General constraint and Dirichlet BC
Hi all, Referring to Comsol 4.4 Manual, under equation-based modelling, general form PDE pg762, what exactly does line 3 and 4 in equation 16.1 mean ? I am simulating joule heating physics on a simple...
View ArticleElectric Field in a Three Phase PILC Cable Won't Solve
Hi I am brand new to comsol, and I've set up a simplified model of a PILC cable consisting of a lead sheath, three copper conductors and an insulating material. The insulator is a material that I...
View Article3D Helix Laminar flow, heat transfer in fluids and heat transfer in solids
Hello, I need help with the Solving method, I'm trying to solve a 3D problem with three multiphysics, my geometry have two domains. Somebody now the difference between the direct model and the...
View ArticleInduction heating with frequency transient
Hello dear all, I want to simulate an inductor to investigate the temperature rise of core and coil respectively, due to core losses (the Hysteresis, Eddy current, and Residual loss), and internal...
View ArticleResolve error; MUMPS allocation factor increased
Hello everyone On running a time dependent study I get an error that "MUMPS allocation factor increased to 2.0736." I know that this error can results due to incorrect boundary conditions but I am feel...
View ArticleCompute displacement
Hi, I am a amateur at COMSOL and have to create a model using PVDF attached to an aluminium sheet which rotates and bends on encountering an abnormality. So my problem is that i first created a...
View ArticleDetermine Arrenhius damage integral for a solution
I am trying to apply an Arrenhius damage integral DURING the solution of an electrosurgical problem using the Bioheat Transfer Module along with the Conductive Media DC module (T and V are the...
View ArticleTime dependent and non linear model takes (too?) long to solve...
Hello everyone, I am simulating electrical machines within the rotating machinery interface in the ACDC module. The model I calculate right now solves. But the way it solves is not satisfying in my...
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Coupling problem: Nernst-Planck equation with Poisson not converging
Hi, I am unsuccessfully trying to implement to Poisson equation through the Electrostatic Module into the Module "Transport of Diluted species" for a stationary case. Beside those modules I use the...
View ArticleElectrostatic and transport of diluted species coupling to an IPMC sensor model
Dear community, I am trying to build a simulation of an Ionic Polymer Metal Composite (IPMC) strip sensor, a thin membrane of polymer ionic on witch too thin gold electrodes are plated. It is a 2D time...
View ArticleParametric sweep query
Hello I am trying to implement a parametric sweep in my model. But a problem is that for different configurations, I need to refine the mesh. For example: I have a set of electrodes and between them...
View ArticleHeat-moisture coupling, condensation
Hello, I am trying to evaluate one building foundation detail. My goals are to: 1) generate thermal fields in time 2) determine the moisture concentration inside the construction 3) find out if there...
View ArticleDivision by zero
Hi, I am trying to model a spring-in effect for epoxy. When using a parametric sweep to evaluate 8 to 24 plies (iterations of 4) of material under temperatures ranging from 100 to 160, I get a...
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