Heat Generation for a Specified Time
Hello all, I have a model in which I have two heat sources, one of which starts at the beginning of the simulation, and the other is controlled (turned on) by a temperature probe. Is there any way to...
View ArticleTime Dependent study
I am working on simulation of Time dependent study of wire in a tube furnace. i am using fluid structure interaction an heat transfer in fluids. My objective is to view temperature profile by time...
View ArticleMeshing Error
I am trying to mesh a geometry with 2 concentric cylinders present in a air flow passage for thermal study. While meshing.. i am getting the following error "intersecting face elements" for the inner...
View Articlecapacitive pressure sensor
respected sir i am using comsole 3.5. in that 3.5 version there is a model is given which is inside mems-->sensor-->pressure sensor 3d.mph,,,in that model everything is ok but in the 3d model...
View ArticleDeposition rate using particle tracing module
Hi I have modeled a reactor using the "fluid flow" and "particle tracing module". A substrate wafer is placed across the flow channel. I have implemented the boundary condition so that whenever a...
View Articlecomputing in comsol
The 3D plot group appears light green throughout the model. There is no error indication. How to get the correct result. I am simulating a spin based device. Many materials I have incorporated are user...
View ArticleAcoustic Band Structure in 2d
Hi Folks - Ive posted a couple of questions to some related discussion but it looks like they haven't been visited in a while so I thought I would make a new discussion group. I am interested in...
View ArticleHeat Pipe on a Heatsink
I watched the tutorial for Heatsink Analysis. I was wondering if we can develop the model by adding a heat pipe. I was told that it needs to be developed as a porous region but how the -thermodynamic...
View Articleimporting txt file to create geometry in comsol 4.0a
hi can i create a geometry by importing coordinate data existing in a text file in comsol4.0a? suppose i am having (x,y) data in a text file and i want to use this data for creating geometry in...
View ArticleRecoverable error in residual, but solver could not recover.
Recoverable error in residual, but solver could not recover. What is the meaning of this error ?
View ArticleNatural Heat Convection - Solution not converged
I am trying to solve a simple problem of natural heat convection in water. It is a 2D problem . Two faces are kept at 300K and 310 K. Dimensions are 1 and .6 m . I have connected both heat and flow...
View Articleimport a bmp image into COMSOL geometry
Hey, as stated in this webpage: http://www.comsol.com/products/formats/ Comsol can both read and write few types of images. However, when I tried to import a bmp image as my structure for flow...
View ArticlePiezoelectric coupled with a shunt circuit for vibration damping
Hi, everyone! I am simulating the effect of a shunt circuit on the vibration of a piezoelectric device. Theoretically, with a shunt circuit connected (a resistor and a inductor in parallel with the...
View Articlepore scale model:autocad import
I have created a model in autocad. I wish to simulate fluid flow in it(a porous media). it is a mdoel of grain particles. the problem is that at the import stage,i am getting error message that the...
View ArticleDimension of a exported data array
I have two model, and I need to graph with matlab the difference. I plot with 1D graph a first model, and export the graph; then i plot with 1D graph the second model, and export the graph. My problem...
View ArticleTurbulence model of hydraulic valve
Hello everybody I really hope you can help me with this:-) I'm currently trying to simulate a flow of hydraulic oil through a valve however, I keep getting the following error: Failed to find a...
View ArticleAverage in a circle line
Can anyone help me with the problem? I have a circle plane with a radius of 1. The current model can calculate the concentration in each point. Now I want to know the average concentration in the...
View ArticleCOMSOL solver control
Hi, I am looking at a problem that solves physics at two different time scales. Basically, I want to do the following At a coarser time scale I want to solve a few partial differential equations...
View Article[Solved] Selection Left Click
Hello community, I am faced with a strange problem. I just updated to Comsol 4.3 after using 4.2a for a long time. But it seems I can't left-click on an object to select it anymore. I don't know...
View ArticleDifficulty in using iterative method for Rf problems which has multiple ports...
Hi everybody, have anybody encountered the problem of keep on having ill conditioned preconditioner when you apply a lot of port condition on a single boundary (For grating structure simulations where...
View Article