Java Runtime Environment error
Getting following error, A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x0000003da3efbc6c, pid=6909, tid=46912497239488 # # JRE version: 6.0_20-b02 # Java VM:...
View ArticleJoule heating using AC voltage
Can I simulate the following phenomenon in COMSOL 4.1? When AC voltage is applied across a silicon beam, the temperature on the beam will change due to Joule heating and the resulting thermal force...
View ArticleGravity effect
Hi, Sorry for my newbie question. I'm trying to simulate 2D two-phase flow in porous media. I'm wondering whether COMSOL considers gravity effect when applying Two-Phase Darcy's Law physics. Thank you,...
View ArticleAbout optical force calculation of particles manipulated by microring resonator
Hi,everyone. I want to simulate a structure which includes two bus waveguides and one microring resonator to form an on-chip optical tweezer. One microparticle is placed in the gap area between one...
View ArticleSimulatneous temperature distribution...!
Dear Comsol Users, I am willing to come over to you again, this time with some questions I would like to be enlighted. I've built a 3D heat exchanger (coil) inside a material (cylinder) and with...
View ArticleResonance frequency of beam (calculation+plot)
HI I want to calculate and plot resonance frequency of cantilever that I designed in MEMS module. Based on the previous discussions here I understand that I should do the study in "Eigenfrequency" and...
View Article2D geometry but illuminated from below
Hi, I want to create a 2D geometry but illuminate it from below, or out of plane, with a plane wave. Whenever I try and set the Background Field as exp(-i*emw.k0*z) (in x direction) I get errors as it...
View Articleproblem with port boundary condition
Hi, I am trying to simulate a coupler so I need to set a port as inport and I have to select "wave excitation at this port " check box but it's inactive. How can I activate it? Thanks, sara
View ArticleFirst time user - Which Model to use
Hi, I am trying to model a particle moving through the air via gravity and impacting a liquid and getting imbedded into a glue like liquid. Is this a CFD model or a mechanics model? Are there any...
View ArticleFlux units in surface reaction interface module, and modeling of surface...
Hi, I am trying to model a bulk - surface reaction-diffusion system (diffusion in the solution, diffusion on the surface, and adsorption/desorption which couples the two together). The system has a...
View Articlesloshing tank problem with solid structure
Hi all, I was trying several to do the "sloshing_tank" model with container which is elastic material. when I add the container with the sloshing_tank geometry, the free fluid surface did not show- as...
View ArticleHow to assign different values to dependent variables
Hi, I am just wondering that how it is possible to assign optional values to the dependent variable in some part of the domain ? I always get "Duplicate variable error". Actually I am trying to put...
View ArticleElectromagnetic forces on parallel current-carrying wires - Comsol example
Dear all, I suppose that Comsol example: Electromagnetic forces on parallel current-carrying wires in ACDC_Module/Verification_Models/parallel_wires should be fully and properly working example. I...
View ArticleMesh study refinement plots
Hi everyone, I'm running some mesh refinement studies and what I need is to have all curves (from each step of study) all together on one plot. Let's assume I'm not gonna utilize parametric sweet and...
View ArticleNegative Epsilon_Transient RF Simulation
Hi, I am trying to simulate a simple structure, where I have a dielectric, sandwiched between two metallic layers in time domain. I work at a single frequency, so there is no need even to define the...
View Articleoutput not saved
I have been running a number of long running transient cases.I ensure that I output the results often enough. However, I have noticed that if I kill the job, before it's complete, none of the output...
View Articlequadrotor model
i search for a model of quadrotor (uav). i am new in area of uav modelisation i have a work in Kasdi Merbah University Ouarglawww.univ-ouargla.dz
View ArticleError: Failed to compute elastoplastic strain variables
I am using solid mechanics and Darcy's law modules. In the solid mechanics, I add soil plasticity model and use D-P model, but calculation is ending by this error. Could you tell me what is the problem...
View Articlethermally resistive layer
Hi everyone, I am modeling a pipe with fluid circulating within by coupling heat transfer and fluid flow and the pipe diameter is defined in the geometry section. i need to define the pipe wall...
View Articlesolver settings
Hi I'm using two physics piezoelectric and moving mesh. I want to change the thickness of the PZT layer using moving mesh and want to calculate the voltage value for each thickness. how to do it in...
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