how to calulate the size of the area
Hi,,recently ,when i finish my simulation,i want to calulate the size of the area bounded by a given contour,Could someone tell me how can i do that ?Thanks a lot.
View ArticleBoundary conditions / multiple dependet PDE (coefficient form)
Hey there, I am using the PDE coefficient form with 5 variables (u1, u2, u3, T, p) to solve a thermoacoustic problem in comsol. I want to implement the following BC to the whole geometry (sound hard,...
View ArticleSpecify inflow
Hi everyone! I'm dueling with a problem and I'm a very recent user of COMSOL so probably this is an easy thing but not that simple for me. So, I'm trying to simulate the flow of a specific amount of...
View ArticleStructural optimisation
Hi, I am using a livelink from Solidworks to Comsol in order to import 3D geometry and quickly define some geometry parameters. I've made a structural analysis with applying torque load to my model and...
View ArticleModelling of a switched reluctance motor
Hi I'm a new COMSOL user(have the 4.0a version). I would like to model a Switched Reluctance Motor(attached picture). The design is rather simple. The stator consists of multiple salient...
View ArticleMultiphase Stirred Tank
Hello! I'm trying to simulate a stirred tank of water with air bubbles in 2D Axisymmetric model. But, In the bubbly flow module doesn't exist the condition "sliding wall" Can you help me with this?...
View ArticleMagnetic field of permanent magnet
Hi, I'm trying to create a cylindrical neodymium magnet and visualize the magnetic field generated by the magnet on a normal plane. Anybody knows how to do this? Later on I intended to visualize the...
View ArticleError-System matrix is zero
Failed to find a solution. System matrix is zero. Returned solution is not converged. Can anyone please explain me about this error?
View ArticleNatural heat convection
Dear all I tried to model the heat distribution on the PMMA road inside the convection furnace for optical fiber drawing. The problem now I was enable to heat up the surrounding Air by the convection...
View ArticleEvaluation of global variables in comsol batch
Hi, I have 170 global variables defined in a structural mechanics model in model definitions --> variables. Each of the variables is a line integration process. When I evaluate them to a same table...
View Articlethomson coil modeling
Hello! I am modeling a thomson coil. I made an 2D axisymmetrical model of the exciting coil and a conductive workpiece (armature) which is going to be pushed away from the coil in te 'magnetic and...
View ArticleElectric field lines, Current density lines
Dear All, I have trivial issue. I have model which consists of metal nanoparticles on substrate (RF module). After simulation, I want to plot electric field lines (Ex and Ey component) and current...
View ArticleJoule heating on thin films
Hi everyone! I am struggling since quiet some time with a problem in joule heating in thin films. I have a resistor on a microscope glass slide and I am able to simulate Joule heating on the glass...
View ArticleEnergy Harvester using a vibration generator and magnets
For a thesis paper my group member and I are going harvest energy using a vibration generator and magnets. we are using COMSOL to virtually recreate the system. so far we've been able to make the...
View ArticleCoupling Physics (Piezoelectric + Laminar Flow)
Good day, I am currently running a simulation of a SAW device that interacts with a fluid domain. I have managed to simulate the SAW device with the piezoelectric physics but have yet to be able to...
View ArticleDisplay driver Intel Graphics Accelerator Drivers for Windows 8(R) stopped...
Hi, I have a serious problem. I have Windows 7 on my laptop. Every time I try to open COMSOL 4.3b including results or see any plot in this software, my screen become black, and then there is the empty...
View Articleheat transfer optimization
I would like to ask some question about optimization. i have try to optimize my heat transfer model,but i dont know how to define the objective function. i would like to optimize my model to decrease...
View ArticleCoupling Stationary fluid flow and transient solute transport to AC/DC module
Hello, I'm not the most proficient COMSOL user yet, and I have a 2D problem in v3.5a that would seem to be rather simple but has proven difficult to me thus far. My problem is as follows: I want to...
View ArticleChaotic Response of Beam vibration
Hello everyone, I have a very general question about COMSOL. There is a permanent magnet placed on the tip of a cantilever beam. Another permanent magnet is placed close to the beam tip but does not...
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