Questions on transparent media refractive index in Surface to Surface...
Hello Everyone, I need some help verifying what I did in COMSOL 4.4. I wanted to model how a transparent glass layer with an opaque polymer layer beneath it changes structurally and thermally to solar...
View ArticleConvergence Problem when using the Periodic Flow Condition
Hi everyone, I'm currently using the Laminar Two Phase Flow- Phase Field(tpf) model in Comsol 4.4. The geometry setup is attached. The problem is when I applied Periodic Flow Condition to the left and...
View ArticleTransport of diluted species and electrostatics
Dear Community, I am trying to combine the physics of the poisson equation (electrostatics) with the nernst-planck (transport of diluted species) in Comsol 4.1 for like 6 weeks now, and all I get is...
View ArticleSave a log file on each iteration step with parametric sweep.
Hi, In COMSOL 3.5a I can run parametric sweep over parameter “A” and write a global variable (“B” for instance) into a log file during calculation. With each iteration step I have an updated log file...
View ArticleVarious Problems for Two Phase Flow coupling with Electrostatic
Hi! I am working on Two Phase Flow coupling with Electrostatic using transient (phase initialization and time dependent) solver to simulate electrospray phenomenon, I have encounter some problems and...
View ArticleGeometry Parametric sweep
Hello, I want to run a geometry parametric sweep. Consider the following geometry sweep parameters: H range(20[mm],10[mm],60[mm]) Z range(0[mm],10[mm],20[mm]+H) The idea is that Z maximum value is...
View ArticleFSI Module for blood vessel simulation
Hi, I'm trying to implement a very basic 2D axisymmetric model of a blood vessel (straight tube) using the FSI module as I'm interested in getting a wall deformation profile. The problem is that my...
View Articleplease help me to measure Voltage,!
HI, I am very new to use COMSOL, so I wanna ask some problem to proficient person who could use COMSOL, I'am measuring Voltage from piezo with some stress, when I measured Voltage from piezo by using...
View Articletime dependent study for sinusoidal wave
Dear all, I'm trying to simulate my module in 2D axis of COMSOL version 4.3 in joule heating physics with sinusoidal input voltage of { V0*sin(2*pi*50*t)} and for the frequency of 50 Hz it will takes...
View ArticleElectrostatics module doesnt work
Hello , I am trying to simulate Sharland et al's paper with 6 species corrosion process. After long weeks of attempts I have used constraints to enforce equilibrium constraints. Please find the...
View ArticleHow to solve the shutdown problem due to "flmklblas.DLL"?
I was running a parametric sweep model with direct solver, and my COMSOL 4.1 keeps shutting down when it goes about 60% of the process. The windows 7 logo says the error is due to "flmklblas.DLL". Does...
View ArticleConvergence problem ( PID heater controller)
Hi, I have a problem with the convergence of my model. I have this message d'error "" there are 876 degrees of freedom returning NaN / Inf in the matrix rows for the variable comp1.T. the coordinates...
View ArticleHow to solve the shutdown problem due to "flmklblas.DLL"?
Dear Ivar Kjelberg, Hi! My name is Shiyi Wang, a PhD student majored in Electro-optics. Your clear response and kind help impress me a lot when I check the solutions on the discussion forum. If...
View ArticleFailed to find a solution
Hello I am a new user, and I am very impressed, Comsol is perfectly simulated in chemical reactor design And when I began using of Comsol I have some problems with it. And I have a set of PDE's in...
View ArticleQuestions on transparent media refractive index in Surface to Surface...
Hello Everyone, I need some help verifying what I did in COMSOL 4.4. I wanted to model how a transparent glass layer with an opaque polymer layer beneath it changes structurally and thermally to solar...
View ArticleConvergence Problem when using the Periodic Flow Condition
Hi everyone, I'm currently using the Laminar Two Phase Flow- Phase Field(tpf) model in Comsol 4.4. The geometry setup is attached. The problem is when I applied Periodic Flow Condition to the left and...
View ArticleMeshing copper on a PCB
Hi In the RF module I'm trying to do a simulation for a pcb with metal thickness of 18um. The structure is a 2-port filter. The thickness of substrate is 1.27mm. The software simulates the structure...
View Articlecomsol
Sir, i am facing problem in Comsol modelling. I am attaching image of model .Please help me to find the correct solution of spectral image.
View ArticleTime-dependent heat sources are not being incorporated into solution
Hi everyone, I am using FEA to find residual stresses in a 4-pass weld plate. I am using the Thermal Stress (Solid Mechanics/ Heat transfer in solids coupling) option. I used 4 volumetric heat sources...
View ArticleFinding the Inductance of a Moving Spiral Coil
Hi everyone, I am trying to simulate an out-of-plane spiral coil that expands and contracts based on the change of its temperature. The spiral coil is exposed to a radio frequency field between 10 -...
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