Heat transfer in solids with phase transition
Hello,I'm building a heat transfer model with two contacting domains: a copper cube and ice rod. The copper cube is a heat source and one end of the ice rod is contacting the cube and the temperature...
View ArticleUsing a previous solution as an initial condition, with a different geometry
I’m trying to model how a crater in ice viscously relaxes. I expect for the floor of the crater to rise and velocities to be less than a micron/yr. However, this behavior is not seen because the entire...
View ArticleAnisotropy of Silicon in Solid Mechanics
Hello, I am simulating piezoelectric stack of AlN that is sandwiched between two electrodes and the sandwich sits on a Si substrate. I remember doing this in version 4 and now I am using v5.5 but for...
View ArticleChladni Plate Remodelling
I'm recreating the Chladni Plate with more shape as my study, unfortunately I got problem when I'm creating the model, may I know why I can't make it properly. I can't make another shape. Here is the...
View ArticleSimple Mesh Problem
Hello All, I am having a very very simple meshing problem. I have rectangular geometries stacked up with different dimensions. The cross section looks like a staircase. I would like to mesh this in...
View ArticleProblem with using both CPUs
Hi,I have recently bought a workstation with two Xeon Gold CPUs each having 16 cores (expecting to speed up the simulation!). When I use only one CPU and 16 cores (by going to Preferences>Multicore...
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Programmatically ignore seam edges for cylinders
I'm generating structures using a stochastic process. As a part of this structure I have multiple cylindrical geometries. I require a periodic mesh and have identified a key factor that causes meshing...
View ArticleAttempt to evaluate real square root of negative number. - Function: sqrt...
Hello Everyone,I am doing a simulation on laser keyhole welding and I am getting the following error: Attempt to evaluate real square root of negative number. - Function: sqrt Failed to evaluate...
View ArticleHow to establish a gradient magnetic field by setting in the background field?
Hi, everybody,Recently ,I need a gradient magnetic field as background field for computing. However I don't know how to input a gradient magnetic field related with spatial coordinates, that is how to...
View ArticleCoupling Two phase fluid flow and Electrostatics module
Hi, I am trying to model the shape of a charged fluid-fluid interface in presence of an external electric field. It a 2d model, where the electric field is generated by a parallel plate capacitor type...
View ArticleHow to get plasma density from argon_dbd_1d using LiveLink with Matlab ?
Hello All,I trying to get the plasma density etc from a Comsol tutorial argon_dbd_1d,mph using Livelink for Matlabwhen I usemphglobal(model,'plas.ne')I error, how would one extract the plasma temp,...
View ArticleComsol 5.2a compatibility MAC OS 10.15 Catalina
Hi, does anyone know if version 5.2a is compatible with Mac Os Catalina (10.15)? Thanks
View ArticleExporting java application to runnable jar file
Hello,I am following COMSOL tutorial about making GUI app from Programming reference manual. Everything works fine when I am running application from IDE (eclipse), however when I am trying to export...
View Articleswitch boundary conditions in a model
Hello, dear users. I have a problem with Switching the boundary conditions. There is a chamber with two inlets and one outlet, and I want to simulate a single-phase time-dependent fluid in the chamber....
View ArticleCalculating Surface Tension
Hello,I am having an issue with calculating surface tension in two-phase level set method in 2D axisymmetric section. I have a spherical droplet and I want to calculate the surface tension (in units of...
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Langevin function (division by zero)
Dear Forum,I am trying to implement a modified version of the Poisson Nerst-Planck equation, where the electric permitivity of the medium varies with the local electric field. Which is calculated like...
View ArticleWhat does the solution in frequency domain analysis mean?
I understand that any BC or load set in frequency domain analysis would be an amplitude that is excited harmonically under the** frequency** set in the study node.What I am concerning is the result....
View ArticleAC Voltage for Piezoelectrics
Hello all,I was wondering how to apply a sinusoidal voltage from (0-100)V with an offset of 50V to a piezostack. I was trying a frequency domain with FFT to get the time domain but my amplitude gets...
View ArticleSimulating Cells
Hi all,I'm running Comsol version 5.0 and I was wondering if it were possible to model cellular growth/response to a stimulus? I'm doing lab work involved in endothelial cells growing differently as a...
View ArticlePlane wave of two different wavelength.
I was trying to simulate particle sorting of gold immersed in water medium with a glass substrate. Here, I want to apply two plane wave source incident on the glass substrate together. The two light...
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