How to simulation thermal expansion with a T dependent CTE
I would like to simulate the thermal expansion of an combined object from cryo temperature to room temperature. My current conditions are: COMSOL version 3.5a, simulation model is smsld, the CTE...
View ArticleCalculation of effective material loss (alpha-eff)
I was wondering while doing my undergraduate research that- if there is any way to calculate the effective material absorption loss (alpha-eff) using comsol. I know the equation, but i do not know how...
View ArticleConvergence plots
Does anyone know if it is possible to show a convergence plot during a livelink with Matlab? I'm using version 4.4 and matlab R2013a. Thanks
View ArticleExporting 1D point graph data
Hi all I did simulations for different parameter values (Radius of circle) using 'parameter sweep' and draw point 1D point graph for all the different parameters taking the center of the circle. But I...
View ArticleSingular matrix error occurred
I am finding eigen frequency of two helical coils for wireless electricity. every thing is goes well: geometry, materials,Electromagnetic Waves- Frequency Domain & Mesh . But when I compute,...
View Article2D Marangoni Effect due to Evaporation of Solute
Dear Community, I am trying to solve Marangoni effect due to evaporation of solute. I have closely followed the model example in which the Marangoni effect is due to the thermal gradients. Here is what...
View ArticleSimulate a musical instrument on Comsol
Hi, I'm new to Comsol and I'm trying to perform a simulation about a con-shaped wind musical instrument. I'd like to obtain the harmonics of it, and I have already built a geometry, but I'm not sure...
View Articlehow to solve piecewise equations with integration using comsol?
Hello everyone, I am a new comsol user, recently I have meet a problem and don't know how to solve it. The equation are as follow: X=0, when V<0.5; d(X,t)=V,when V>=0.5; V=sin(2*pi*t); I don't...
View ArticleConcentration profile of transport of diluted species
Hi all I am running simulation containing a node of flow through free and porous media and a node for electrostatics and one node for transportation of dilute species but i m not getting a...
View ArticleSegregated Group Solver different results
Hi folks, I have been using COMSOL for a while now and, sometimes, when facing a difficult convergence problem I do mess around with the solvers a bit. I have seen some posts here on the forum...
View ArticleUsing lower limit node
Hi, I'm trying to use the lower limit node, but I can't select any variables because the variables window is not there. I can select variables in the segregated step nodes. See attached file for...
View ArticleFire and Structure
How can i determine deflection of beam under fire? How can i determine thermal expansion of concrete & steel under fire? How can i determine heat flow rate of concrete & steel under fire?
View ArticleCapacitance
Hi! Where could I find explanation about how Comsol computes capacitance in 3D AC/DC modeule -> statics, electric -> electrostatics (postprocessing, C11_emes)? I have 3.5a version, but I think it...
View ArticleHeat transfer modelling of selective laser melting
Hello everyone, How can I simulate melting of a powder media? To be more clear, when the temperature of a part in a powder bed exceeds melting point, it turns into molten material. After that when the...
View ArticleWater flow in a PVC pipe to measure impact of water pressure on it
Hello, I'm the beginner of Comsol Multiphysics. I wants to pass water though a PVC pipe. I have used a straight pipe using Turbulent Flow, k-ε. In geometry there are two domain one for water, another...
View Article3D Window control with Space Navigator 3D-mouse
Hi everybody, I use a 3dconnexion Spave Navigator for control in SolidWorks. In COMSOL such devices are (to my disappointment) not supported. Does anbody know about a feature request? If not and more...
View ArticleUsing saved solution Comsol v4.1
hi, I want to use the saved solution for the initialization of the second one. for example I solve my problem with a given boundary condition and I want to increase the boundary value for the next...
View ArticleGeometric Nonlinearity problem
I have an odd problem. I am trying to recreate the Large Deformation Beam model (www.comsol.com/showroom/documentation/model/204/) before I start my own project to investigate buckling. I was following...
View Articlecone-jet mode in electrostatic field
Hi, Here is my problem. I want to simulate a electrohydrodynamic (EHD) phenomenone , a nozzle with full water (or electrolyte) in a electrostatic field, the the water is polarized and deformed the...
View ArticleNeed help in output acoustic pressure in air domain
Hello,everyone I used Pressure acoustic, frequency domain and electromechanics Physics, 2D-axisymmetric to simulate a vibration membrane to get the output pressure in the water domain. The result is...
View Article