residual stress from laser heating
Hello I am trying to determine residual stress on a metallic ribbon (28 micron) because of laser heating. The heat source is a continuous wave laser having gaussian profile. I have already got spatial...
View ArticleUpdate Interpolation function in each simulation step
Hello Everyone, I am trying to set up a time-dependent simulation in COMSOL v4.3a. It's a structural mechanics model and the material properties are defined by an interpolation function which is read...
View ArticleDisplacement of device over time
I have modeled a mass spring structure using solid mechanics and a time dependent study. I have applied a body load using 0.1*g_const*solid.rho. When I plot the results of displacement field, it...
View ArticleMultiphase flow, heat transfer due to chemical reaction problem
Hi, I have to simulate a problem : A highly viscous liquid is moving with a certain velocity and we are passing a cooling gas, over the surface of the liquid,to see the cooling effect and observe the...
View Articlecapacitance of a parallel plate capacitor
These are the steps for my capacitor simulation 1. set two solid blocks (dimensions (25x1x20) ) 1 distance away from each other. 2. set a solid box (65x43x60) to surround the plates of the capacitor....
View Articlewhat is wrong with the ALE
(all are in the .doc attachment. Thanks) Hi,everyone, I ‘m building a simple model based on the “heat transfer” module and the “ALE” module. The geometry is a simple rectangle. In the heat transfer...
View ArticleHow to 'fill' the space between two parametric curves.
Good morning, I'm trying to make an S shape drawing to my model that consists in two rectangles and 4 parametric curves ( forming 2 semi-circles). But when I make the extrusion the parametric part of...
View ArticleWater balloon deformation
Hello, I've only recently started using this program, so my level of knowledge is not very high. I'm trying to model the physical deformation of a water balloon due to external force (get the shape in...
View Articlecomsol with matlab
Hi, I encountered a problem while using comsol. when I open the icon comsol with matlab, I got "??? Undefined variable "com" or class "com.comsol.model.util.ModelUtil.connect"." Any ideas on what is...
View ArticleProblem in defining analytic function
Hello everyone, Am working on electrostatics and had used an image function for my model. I am trying to define the relative permitivity of as a function of grey scale in image. But whwn i try to plot...
View ArticleResonating magnets
Hi folks, Me and my team-mates are working on a project and we now need to simulate a design we made. We have a tube with a length of 10cm and a diameter of 2cm. At both ends of the tube, say x = -5cm...
View ArticleHow to use stationary solution as initial value for 2nd time dependet study?
Hello Everybody. I’m using comsol 4.3a. I try to use the solution from study 1 (stationary heat transfer) as the initial temperature value for a second time dependent study. Further a new geometry...
View ArticleNeed help regarding use of optimization tool for inverse heat transfer problem
Hi, I have just started using "Comsole V4.2a". Can anyone provide me any tutorial regarding a simple inverse heat transfer problem ? The problem may be finding out thermal conductivity k, using known...
View ArticleRemeshing a Deformed Mesh in 4.0a
Hi, I am simulating the heat transfer in biological tissue that has been compressed. First I apply a gravitational load, and next I want to run the heat transfer calculations on the deformed geometry....
View ArticleInitial Conditions for Sine-Wave or More complex disturbances
Hi Everyone, I have reviewed previous posts in Comsol forum about I.C . One of the suggested ways of applying the I.C was to do a stationary analysts before the time-dependent one. (This can be true...
View ArticleCoupled magnetic and solid-mechanics simulation
I have a question about coupling a magnetic study to a solid mechanics study. I attach to this email a simple model to explain my question. In the model you can find a permanent magnet with a round...
View ArticleDC discharge dc.de_4
Hi, I am starting to use the plasma module and I am currently having a look at the DC discharge example (www.comsol.com/showroom/documentation/model/8640/). During the model set up the value of the...
View Articlethermally resistive layer
Hi everyone, I am modeling a pipe with fluid circulating within by coupling heat transfer and fluid flow and the pipe diameter is defined in the geometry section. i need to define the pipe wall...
View ArticleHow to display "Cut Point 3D" data sets?
Hi there, I want to simulate and visualize discrete measurement points which I import from another application as distinguished "Point" objects in the geometry of my 3D-model. So far I've created a...
View Articleminimum time value under condition
Hi I have a problem on my simulation I have a time dependent simulation and I want to get the minimum time value when a phenomena occur ( The voltage V raise a value above a certain threshlod) I want...
View Article