Parameter list gives empty sweep
Hello, I am modeling a system intended to display light scattering off of a particle suspended in a liquid medium. I used Electromagnetic Waves, Frequency Domain (emw) and keep getting the error "The...
View Articleincreasing the speed of computation or parallel processing
Hi comsolers, Is there any way to increase the speed of computation for comsol? now, my time series is for one month with daily resolution. and it takes at least 4 or 5 hours to compute. and I have...
View ArticleAbrupt change in concentration value
Hello, I am attempting to model the evaporation of dilute species in an additive manufacturing process. For each added layer of material we have applied a boundary condition at the bottom,...
View ArticleERROR IN SIMULATION
Hi I am getting the following error:"Failed to find a solution. Maximum number of Newton iterations reached. There was an error message from the linear solver. The relative error (71) is greater than...
View Articleoptimising solution methods in parametric sweeps. newton step suddenly going...
I sometimes have my computations converging reasonably but then suddenly one step completely changes the picture and the error drastically increases, almost as if a calculation error had been made,...
View ArticleJoule Heating
Hi, I have started working with Comsol recently and I have been trying to create a model like this: four electrodes in a suspending medium (the model is based in salty water), on a glass surface. The...
View ArticleProblem in convective flow simulation
I am now trying to solve magnetophoresis model by coupling CFD and transport of dilute chemical species modules together. I want to study the dynamical behaviour of the process and I used...
View Articlecan you help me?
Hi Yilong Zhou ,I want to simulate the mixing of nanoparticles. I have the same problem as yours. The simulation results are not consistent with the experimental results. Can you help me. Have you...
View ArticleFailed to find a solution. The relative error is greater than the relative...
Hi all, I'm trying to simulate a Piezoelectric transformer using the piezoelectric devices physics. My structure is quite simple: it's a thin circular membrane of piezoelectric material thick 1um...
View Articlefrrofluid, magnetic field and diluted species
Hi, I want to simulate the concentration variation of nano-particle in a micro-fluid channel under magnetic field, I have built a modeling including transport of diluted species , laminar flow and...
View Articleplease help me?
Hi, I want to simulate the concentration variation of nano-particle in a Y micro-fluid channel under magnetic field, I have built a modeling including transport of diluted species , laminar flow and...
View ArticlePiezoelectric Transducers
Hi I am analyzing the signals in piezoelectric transducers. Can somebody help me in finding some of the difficulties I am facing. 1) How could I measure electric potential of the container on which an...
View ArticleModeling ETD ferrite core
I am trying to model an ETD ferrite core (core losses) and i have been following the tutorial for an E core. (www.comsol.se/model/download/1...els.acdc.ecore_transformer.pdf) However i experience a...
View ArticleMultiphysics
Hello. I have such a question: When I give the project the two physics that have the same output for example, the magnetic field strength of the magnetic field in T, and each physics shows intrinsic...
View ArticleDefinition of some parameters in Joule heating module
Hi guys, I am working on a simple geometry to simulate it with Joule heating module. While I am looking through equations in this module, I cann't find description of some of them. I appreciate if...
View ArticleRequest for your help
Dear Ivar, Hope everything goes well with you. I have posted a thread in the forum, but till now no reply. Since the question is important for me, I would appreciate if you would look through the it...
View ArticleQuestion about Comsol
Good day. 1 If I have more physics in the model together so do not cooperate and give me different results for the same quantity. 2,If I have the model used by electric or magnetic object eg. coil...
View ArticleCOMSOL in parallel mode: a speedup of 20% using 4 cores?
Hello everyone, I have performed the following experiment. Using the command -np #cores, I have forced COMSOL Multiphysics to use 1, 2, 4 or 8 of the available cores on my computer. I also used the...
View Articleinductive heating - moving mesh problem
Hi, i try to simulate a 3D model with a rigid coil over a moving metal-part. The simulation consists of three physics: moving mesh (ale), magnetic and electric fields (mef) and heat transfer (ht). I...
View ArticleFailed to find consistent initial value
Hi, everyone, I try to build a model based on the “Heat Transfer” module and the “ALE” module, just as the .mph attachment shown. When solving it, the following error occurs (just shown in the .png...
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