Global Component To Calculate Capacitance Has Disappeared?
Hello, I am using the AC/DC electrostatics module to calculate the capacitance between two metal lines (a component of the overall detector I am modeling). I defined one of the lines as the terminal...
View ArticleVariable static at zero
Hi. I had a similar problem a few weeks ago, but I believe this is different. Sorry if I'm spamming up the forum. I'm trying to see how a function varies. Forgive my mess, but I've uploaded my defined...
View ArticlePDE for Electron Hole diffusion
Hi, I have a question that I was hoping someone in the community could kindly help me with. I am trying to model electron/hole density (two concentric clouds) diffusion with PDE (general Coefficients)....
View ArticleBolt pretension not converging
Hi, I'm having trouble with convergence in a bolt pretension model. The model contains two imported CAD parts, and two bolts from COMSOL part library. The model is built by emulating the tutorial...
View ArticleShowing convergence plots during a simulation in batch mode
Hi, I am using COMSOL 5.2a on Windows 7 and run my codes in batch mode using Notepad and Windows command line. By using ''-graphics'' command I can see plots of my already defined probes on screen...
View ArticlePlotting magnetic field w.r.t distance along z-axis
Hi all, I've adopted the following model: www.comsol.com/model/static-fi...eling-of-a-halbach-rotor-14369 I've changed the magnetic field to be confined within the rotor through simply changing the...
View ArticleWeather Conditions on a Plant
I'm working on a project, which i am making a study about the interaction of sunlight with a plant at a specific weather conditions. The problem that i am facing is that i don't know how to input the...
View ArticleAdd hourly weather conditions data
I'm working on a project, which i am making a study about the interaction of sunlight with a plant at a specific weather conditions. The problem that i am facing is that i don't know how to input the...
View ArticleHeat transfer in an axial symmetric fin
Hi guys, I am trying to find the heat transfer from an axially symmetric fin using COMSOL. What I've done is to create a fin using the axisymmetric mode. This essentially looks like a 2D rectangle on...
View ArticleElectro Thermal Compliant Actuators
Hello all, I am trying to simulate an ETC Actuator in COMSOL, i am trying to find the displacement due to the driven force which in this case is DC Voltage driven, i am using the 'Joule heating and...
View ArticleError in multiphysics compilation
I got error message "Error in multiphysics compilation" I am working with Heat transfer in solid module. Can you help? Thanks
View ArticleCOMSOL 5.2 gets stuck after some time
From almost two weeks I am facing this problem that whenever I run a simulation that requires long processing time, I find that the program stops responding. I just get a "waiting" cursor and a (Not...
View ArticleComsol terminates in strange ways
Hi! I've been wondering about this for some time now, as it happens quite a lot with me. How is it, that the "Termination criterion" is set to "Solution or residual", and the "Relative error" is set...
View ArticleCoupling magnetic field (no current) with solid state BH curve
Hi All, I want to model magnetostriction phenomena. I found an example (nonlinear_magnetostriction.mph) where the magnetic field is created by a coil (current density J0) and which uses Magnetic Field...
View ArticleInitial Values setting during parametric sweep calculation
Hi all, When I was doing parametric sweep in a stationary solver, I found that once the "stationary solver" is started, the initial value for every parametric step is defined by solution of the last...
View ArticleUsing previous solution as initial values
Dear all, I am trying to get familiar with how to use results from a previous solution as initial conditions in a new solution. To do this I am using a very simple model (see description down below)...
View ArticleCompute study for only the 2D cross section of a 3D geometry?
Hi all, I have made a 3D model in COMSOL vs 5.2a of a microfluidics channel and am attempting to model the DEP response of cells in the channel to the presence of an electric field created by...
View ArticleFloating Potential
I have a question about floating potential condition. I have 2 metals (like electrodes) which are not directly connected to voltage source and i want to use them to measure the signal (or voltage...
View Articlestarting comsol with alternative mpi
hello! i'm trying to run comsol on our cluster. however, the cluster isn't supporting intel mpi. the alternatives i can use are: mvapich2_gcc-1.6 mvapich2_gcc_qlc-1.6 mvapich2_intel_qlc-1.6...
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