Communication between Comsol and Matlab
Hello Forum, I encounter a problem when I try to use a Matlab function within Comsol. I can plot the function in Comsol. But when I try to run the study, I receive the error attached: "Failure loading...
View ArticlePlotting Problems
I try to plot the following structure: dat=mpheval(out,'solid.E','dataset','dset1') dat = expr: {'solid.E'} d1: [1x8856 double] p: [2x8856 double] t: [3x17334 int32] ve: [8856x1 int32] unit: {'Pa'}...
View ArticleWhile Loops and Converge Criteria for pseudo steady state model
Hello, I am attempting to create a series of simulations whose aim it is to examine the influence of my model's physics on the models geometry. What I have is a vascular geometry , which has a certain...
View ArticleLaplace operator for domain probe---2D axisymmetric tissue-vessel oxygen...
Hi all, I have been learning to use COMSOL for some time, but this is my first time to join this community. I have few questions about using Laplace operator in the domain probe function. I am...
View ArticlePipe Flow-multifluid distillation
Problem consists of 1 inlet pipe with high viscosity fluid. Through distillation process oulet pipes conists of fluids of different viscosities and densities. Has anyone handled this type of problem?...
View Articleresidual 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 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 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 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 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 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 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 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 ArticleSimulation of third order nonlinearities such as four wave mixing in silicon...
Hello; I myself think that simulation of nonlinearities is possible by COMSOL. However, I have not tried it until now. The question in my mind is possibility of launching several fields (several...
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