Simple question regarding parametric sweep of eigenfrequencies
Hello everyone, I have been an avoid reader of the forum for a while now, and have done my best to find the answer to my question, but I am still getting confused. My model is very simple. A 2D disc...
View Articlefailure to find solution in newer version of COMSOL
Hi, I am a student with very minimal experience with COMSOL (most of what I know, I have learned just from experimenting with the program). I am modeling fluid flow through a flow chamber (see attached...
View ArticleUsing stationary computational results as the initial condition for...
Hi, I'm kind of new to transient analysis in COMSOL and I have a few questions. Is it possible to use the reults of a stationary study as the initial conditions for transient analysis? For example, in...
View Articleread initial conditions for laminar flow problem from external file.
Hello, First of all, I like to apologize if this is a fundamental question but I cannot find an answer to it and I am new to Comsol. I am running a 2D laminar flow problem and have to integrate over...
View Articledrying of pear in rectangular shape
Hello, I'm new in comsol, i want to simulate the drying effect of a fruit (pear) in rectangula shape. I'have just started ,so I want to use fick law to determine D (m^2/s) and h (m/s), and then add...
View ArticleLoad vector is always zero vector in linear problems? Hmm...
Attached is a model with one 1D element and 2 Dirichlet-type BCs on both ends of it implemented similarly to Chien Liu's blog post here: www.comsol.com/blogs/implement...k-form-in-comsol-multiphysics/...
View ArticleStructural Mechanics: Out of plane displacement and buckling
I'm trying to model the deformation of a ribbon of SU8 with a pattern of cuts (kirigami) undergoing a 1D tensile loading. The loading is kept in the xy plane, but the force causes a twisting of...
View ArticleFSI Problems
I am new to COMSOL and currently have a time dependent FSI model with numerous problems. The model is that of a fluid flow over an elastic material that should (hopefully) deform similar to the example...
View Articlecoupling solid mechanics with magnetic fields
Hello, I'm currently trying to analyze the change of magnetic flux that is made by a 3D magnet that is adjusted on a periodically moving beam. (Physics: SOLID, MF and Time Dependent) But unfortunately...
View ArticleImplicit equation solving involving spatial and time dependent variables.
Hi! I am trying to solve implicit equation involving spatial and time dependent variables. For ex: iloc=exp(phi1-phi2-iloc*R), phi1 and phi2 are potentials which are space and time dependent. If i...
View ArticleVariable modifications between solution iterations
I'm developing a transient model using the Livelink interface. The model first calculates an initial solution for the first time window, then I would like to modify the state variable values due to...
View ArticleProblem in one of the Model Library of Comsol 3.5
Hey guys, I'm currently trying the model 'Two Phase Fluid-Structure Interaction' in V3.5's Model Library. You can find this at Model Library-> MEMS Module-> Microfluidics Models->twophase fsi....
View ArticleTwo Physics in sequence
I want you to help me to know how to study two different physics in the same simulation and solve it one by one? Thank you
View ArticleDC discharge modelling query
Hello I am modelling a DC discharge in between 2 electrodes which are positioned asymmetrically. I am making use of the example model in comsol library (positive column-2d). Both models are attached in...
View ArticleNew user, New software, New errors (mechanical problem)
Hello, I have started using comsol two weeks ago for my research and I'm a little bit disappointed. I had a first contact with this software during my studies and i remember a taste of "it never...
View ArticleModelling Snap-through of curved beams-Post-buckling analysis
Hi there, I am new to COMSOL and am trying to model the snap through of curved beams in one dimensional lattice in 3D. With one of the boundaries of lattice fixed and opposite boundary has been given a...
View ArticleMaximum number of Newton iterations reached FLOW BOILING
Hii..... I am simulating flow boiling in micro channel in COMSOL 5.2 , For that I have added Hypothetical bubble of steam(Contact angle 30 deg) in channel and water is entering at average velocity of...
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 ArticleInject nozzle periodic input border
Hello. Everyone know inject nozzle from model library. But how can I use periodic input boundary condition for several droplets modeling?
View ArticleWave Propagation/Resonance in Nonlinear solid materials
Dear COMSOL fellows, I have encountered a problem in simulating resonance of my own external nonlinear material in a simply-supported aluminum thin plate. Using time-dependent study, it still gives me...
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