text 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 ArticleGeometry variation within Time-Dependent solving.
Hello, I was wondering if it's possible to change geometry according to time ( via internal or external function(MatLab)) ? ie: Making a block depth function of time.
View ArticleSimulating the stress in a square and rectangular Silicon Membrane
Hi, I have an assignment under which I have to use Comsol Multiphysics to simulate the stress in a silicon membrane. The question is as such: Simulate the stress in a Si membrane deformed under a...
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 ArticleCoefficient of isotropic diffusion in icp_torch model
Hello, I have one question to the developers of icp_torch model of PLasma module- Equlibrium discharges. What does mean the isotropic diffusion coefficient in this model in main laminar flow settings...
View ArticleSessile droplet
I want to put a sessile droplet inside a channel. How to create a droplet of a specific material ? and how do I choose the model ? As a reference I was wondering about the model in one the Paper - A...
View ArticleElectric Currents and Transport of a Dilute Species to Generate IV Sweep Plots
Hello community, I've created a working and functional model that shows the migration of two oppositely charged species over time in response to an applied electric potential through the bulk material....
View ArticleCyclic Dependencies in an AR coating
Hi all, I am currently working on modeling an antireflection coating by building a model based off of the Plasmonic Wire Grating tutorial. I have attached the model, so I'll skip over the particulars...
View ArticleEquation in matrix form for use for MATLAB Livelink
Dear all, This seems to be a pretty simple question but I am struggling to find any help on the topic! I have recently started using COMSOL with the livelink to write a Model Order Reduction in MATLAB....
View ArticleCoupling Two-Phase Laminar Flow & Moving Mesh physics
Dear Comsol community, I'm trying to model a flow of water in air. The flow is created by a moving wall (like in a syringe). The wall is moving at a speed of 1 mm/s. All the dimensions on the GIF file...
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 Articlesaved solutions with transient multi-physics problem
I am looking for guidance on how to properly save and use solutions for a multi-step transient problem. Problem description: I have a thin conductor patterned onto a substrate. Current is applied...
View ArticleSimulating the stress in a square and rectangular Silicon Membrane
Hi, I have an assignment under which I have to use Comsol Multiphysics to simulate the stress in a silicon membrane. The question is as such: Simulate the stress in a Si membrane deformed under a...
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