Adding temperature varying with time
I want to enter temperature for calculating heat flux (temperature varies with time). Is there any method of entering the values? How can I use functions like interpolation, Rectangular etc,,,
View ArticleJoule Heating - Study help
Hello all, I am currently working on modeling the thermal stresses of a surface mounted component on a PCB. However, i am currently struggling to get the physics to work. I have followed the available...
View ArticleWhy my perspective view is like!?(Please help me!!!!!!)
Hey guys! I install the program & run it, but the perspective view is like(picture is attached). how to Repair or fix it? please help!!!!
View ArticleHeating evaluate from short current in Busbar
Hello everyone, I have normal Busbar , how can man the heating in this busbar and around it when flow throw it short current? I need your proposes. M
View ArticleHeat Transfer, Joule Heating, 1D Plot Global
Hello, I have a following problem. I use the module “Joule Heating”, and I want to calculate a resistance in the temperature dependence (“Time Dependent Study”). How can I display the global...
View ArticleGas in Thermal Stress
I am trying to characterize a flaw in a structure (a hole filled with air) for a thermal stress simulation. From a structural point of view, the gas has a Young molulus of zero which cause the...
View ArticleCOMSOL Error Message
Hi I've been problems with COMSOL in Plasma Module The following feature has encountered a problem:"The source selection for the operator intpot1 must be nonempty. Error in multiphysics compilation. -...
View ArticleComsol on HPC server
I have just set up Comsol on a 48 processor machine using HPC server it is one machine with no cluster. It is running extremely slow. When using all 48 processors it takes over 137 seconds to process...
View Articlewhere can I find the user guide for "Heat transfer module" and "joule heating...
Hi guys, just wondering where can I get the user guide of "Heat transfer module" and "joule heating module"? Electronic files will be better. I do have it for v 3.5, but as the software upgraded to...
View ArticleError: Parameter lists gives empty sweep
Hello, I would like to know the reasoning behind this error in return of a monotonously incresing series of frequencies. Examples: a) 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 90,...
View ArticleProperties of magnetic flux in some transformer sheets
Hello everyone, i´m trying to observe the magnetic flux density in a smal gap of some transformer sheets. So far building the model and getting results that are in consent with my experimental setup...
View ArticleAutomatic remeshing depending upon the gradient of the solution
Hello, everyone, I am solving a nonlinear equation on the plane. Its solution, u=u(x,y) is everywhere close to zero except for some region in the vicinity of the coordinate origin. This region is not...
View ArticleHow to determine face numbers (using matlab livelink) associated with an object
Hello again, I am trying to 'automatically' set my boundary conditions for a model generated in matlab with livelink. I know which objects need to have which boundary conditions based on a draw order...
View ArticlePressure in Reacting Flow in Porous Media
Hello All, I am running a model in 4.3a with the node "Reacting Flow in Porous Media," and simulating groundwater flow in a confined aquifer. When I look at the results, my average pressure gets down...
View ArticleParameterise the position in a text file?
Hello, I want to use the 2D distribution of the relative permeability of a nonlinear calculation in a linear calculation of the same Model with same parameters etc. For that I export the data of the...
View ArticleVelocity point constraint
Hi All, Can we define a velocity constraint at a certain point in a CFD simulation. It can be done for the pressure and there exist some explanations on this issue, but is it possible for the velocity...
View ArticleContinuing Modeling Issues with 2D & 3D piezoelectric SAW model
Hello all, I’m in desperate need of help with my model. The initial model setup is a 2D cross-sectional SAW device where I have silicon, a metallic electrode as my ground, a buffer layer, a...
View ArticleMaterial Parameter References and Subscritpions --- seeking suggestions
Good Day, My work involves a wide variety of materials used in semiconductors and electronic packaging. Perhaps like you I've found references on the web useful but incomplete and scattered. COMSOL...
View ArticleProblem with 3D PDE thin layer mesh
Hi everyone I encountered a problem with meshing a thin layer(~10e-6m) with 3D PDE model. I am not sure how to mesh such thin layer. Has anyone managed to mesh a similar case? Looking forward to your...
View ArticleMicrofluidic Frictional Energy Measurement
Hello, I want to measure the heat generated by frictional energy in Fluid passing through micro channel. Based on my structure it should be around 10 micro Joule. To make the case simple, the heat...
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