Livelink for Matlab
Hi, I would like to create a simple model using API in Matlab. When I type the command "shell.feature.create('fc1', 'FixedConstraint') ", errors "Unkonwn feature ID#FixedConstraint" exsit. I have...
View Articlemodel coupling
Dear sir or madam, I have a problem about coupling of a laminar flow domain and thin film flow-shell domain, 3d case. I have to transfer the pressure on an edge to the whole surface,shown in the...
View Articleliquid loading
I'm a beginner level COMSOL user and new to this forum. So please excuse me if I happen to ask a really silly question. I've been trying to simulate the behaviour of a piezoelectric crystal upon...
View ArticleCavitation in thin films
Relating to this topic from 2011: www.comsol.com/community/forums/general/thread/22758 Are there already tools available within Comsol to investigate cavitation effects in thin fluid films (such as...
View ArticleComsol won't create multiple meshes
I have a problem with Comsol and meshes. I have a carbon fibre, with copper at either end, sitting on top of a piece of glass. I illuminate the carbon fibre and look at heat transfer. I need a good...
View ArticleThermoelectric Effect - Adding the physics
Hello, I'm working in a project on thermoelectric generator. As 'Thermoelectric' physics interface,is not in the physics area/physics list, I was trying to add the physics using the steps given in the...
View ArticleGeneral Projection Bulk Temperature Example & Question
Dear all, The following model may prove useful to somebody (other than myself) who wishes to calculate the average of some scalar value as a function of axial distance. In this case it's the bulk fluid...
View ArticleShape optimization of radiating plate
Dear all, I'm currently optimizing the shape of a vibrating plate in an closed hollow cylinder filled with air to get an as straight as possible wavefront. I model it 2D axisymmetric and make use of...
View Articleelectromechanics
Hi, Can anybody tell me how to apply vaccum of 70-mtorr around my model clamped-clamped beam resonator.Something like keeping my model inside a chamber of vaccum.
View Articlemodel eye and its saccades
Hi, I'm trying to model the eye and have it oscillate about it's axis with an angular velocity. However, when I use moving mesh to create movement, I can't seem to get it to rotate about it's axis (the...
View ArticleMesh creation
Hello, I have a problem with mesh generation. I set up the model and then mesh it. but when I want to run the study at first step it re-generate the mesh. I don't know what is the reason. my model...
View ArticleNelder-Mead method in optimization module
Hello, I'm wondering if the Nelder-Mead method is also available in the optimization module? I can find it in the optimization node of a study, but not in the optimization module if it was added as...
View ArticlePort Phase
Hi all, I have a question about the port phase in rf module. I noticed that the software accepts 'i' as an argument for the field "port phase". what does that do? if I'im using multiple ports what is...
View ArticleDefining port, identity pair and PML layer
Dear Friend, Currently i am using comsol 4.3 version, i am totally new about it. could you suggest me how can i define port i,identity pair and also PML at same time in my model. it was works nicely in...
View ArticleTransport of concentrated species, Membrane gas separation
I've attached simplified model describing transport of the one component through membrane. I've made it simple to make you catch a problem easily. In my advanced model I'm using Laminar Flow physics...
View ArticleElectromechanics in COMSOL
Hi, I am a student and I have just started using COMSOL. I would like to find out the displacement of a cantilever beam (2-DIMENSIONAL) due to electrostatic force created when 10V of voltage is applied...
View ArticleHelp in COMSOL (LED)
Hi, New to COMSOL here. I am trying to simulate the extraction efficiency of different LED casings (the encapsulation) in COMSOL. Currently I have tried three different geometries: cone, pyramid, and a...
View Articleexpression for analytic function for ferro-fluid
In "magnetic drug" problem, if i actually use the ferro-fluid instead of taking it's mass fraction as 0.1, what would be the expression for analytic function? According to my understanding, we don't...
View ArticleStep index fiber
Hi, In the simulation of step-index fiber if i place a particle beside the core and want to evaluate a line integration of the following equation ----------------...
View ArticleAssigning material (iron, air or...) to the permanent magnet domains in...
Hi, I am modeling a generator in which I have used relative velocity of permanent magnets and coils to generate emf. I have successfully applied magnet properties (magnetization) in the study using a...
View Article