error meassages
Hi Mads, I wish you could assist me with this error I am getting, when run the poroelastic wave model: The following feature has encountered a problem: Parameter list gives empty sweep - Feature:...
View Articleaccess eigenmode displacement for mesh nodes?
Hi! This is my first post to this forum. I have a simple mechanical structure (say, a clamped clamped beam) where I have been trying to extract, via LiveLink, the displacements for the actual mesh...
View ArticleError: Meshes not compatible
Hi all, I'm running a mass transport simulation that involves first a laminar flow study, then using the results for a transport of diluted species study. I have had some issues with meshing my 3D STL...
View ArticleMoving mesh.
I don't know how to put some conditions in the moving mesh when I set up surface wave. I found an example file whose named 'Sloshing tank' through comsol model library. It is pretty similar with what...
View ArticleElectrostatics module doesnt work
Hello , I am trying to simulate Sharland et al's paper with 6 species corrosion process. After long weeks of attempts I have used constraints to enforce equilibrium constraints. Please find the...
View ArticleNo electrostatics force in the assembly geometry mode?
Hi, I use COMSLO to model a MEMS capacitor, whose top plate will deflect to the bottom plate due to the electromechanics force. The model works well in union mode with the physics of ES+SOILD+ALE. Then...
View Articlescript for exporting deformed geom from livlink matlab ?
Hi all, In GUI, I could remesh the deformed configuration from the results dataset, and from there i could export to a new geometry (xx.mphbin). But how can i do the same from matlab livelink ? I...
View ArticleHow to extract the nodes number from a up and down interior boundary or at...
Hi everybody, How to extract the nodes number from a up and down interior boundary or the outside boundary shown in the attachment.jpg? thanks in advance! Tianya
View ArticleHow to scale the mesh to the geometry size
Hi, I have a quick question: if you mesh a 2D square geometry of size 'L' with a mapped mesh and a total of 'x' domain elements, what would be an appropriate scaling criteria for the mesh if I was to...
View ArticleMeshing copper on a PCB
Hi In the RF module I'm trying to do a simulation for a pcb with metal thickness of 18um. The structure is a 2-port filter. The thickness of substrate is 1.27mm. The software simulates the structure...
View Articlescript for exporting deformed geom from livlink matlab ?
Hi all, In GUI, I could remesh the deformed configuration from the results dataset, and from there i could export to a new geometry (xx.mphbin). But how can i do the same from matlab livelink ? I...
View ArticleMixture of sweep mesh+Tetrahedral mesh in a 3D model
I have a helical coil embedded in solid cylinder and was trying to figure out best way to mesh it since helix always creates problems. 1)I did a mapped mesh on one end of coil cross section. 2)Swept it...
View ArticleBoundary conditions on 2D axis-symmteric model in Thermal stressProblem
I am imposing the very high temperature field i.e. T(r,z) on 2D axis-symmetric (cylinder) model in order to calculate stresses/strains. As temperature is high enough to yield the material , so I am...
View ArticleErrors with conjugate heat transfer...
Hello I am new to COMSOL and I am doing simple test model of natural convection of air around hot metal cylinder. I think, that I set everything properly (like volume force etc), physics is quite easy...
View ArticleUser Controlled Mesh across two different geometries
Hello All, I am new to COMSOL and would like to get some help with user controlled mesh. Attached is a figure I would like to model in COMSOL. The length is 2cm and the height is 1cm. When I try to use...
View Articlehow to use the "Previous solution" as initial value for new analysis
Any idea how to use the "Previous solution" as initial value for new analysis, for the sake of solution convergence?? Preferably, step-by-step procedure! Thanks, Hina
View ArticleI want to get surface wave.
Hi there. Thank you for reading my discussion. I try to build suface wave. I make a rectangular at first and apply a open boundary condition at the top of rectangular , then I use...
View Articlemeshing long and thin wire
Dear all, I need to create long and thin wire with different length of (500,700,1000)m, and radius of (0.315mm) and layer of insulator of (0.135 mm) in (2D) axi-symmetrical. But when I add the...
View Articleconvective heat transfer on a sphere
Hey guys, I'm writing a simulation of freeze drying for my bachelor thesis. In my bachelor-thesis, i’m looking at a system with a particle of pure ice (T=230 K), which is exposed to a ingoing water...
View Articlemode analysis, not getting the right neff
Hi: I am solving one file using Comsol 3.5a but I am getting neff to be 3.8. I am supposed to get it 3.88. Can anyone check why my neff does not go higher?. I have been trying for days and the best...
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