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Modeling spring between two surfaces in COMSOL
Hi,I am modeling a structure from silicone which has multiple holes in it as can be seen in the image. My question is, how do I model a spring with a predeformation between two sides of one hole. So I...
View ArticleAcoustic transducer and rock interaction
Hi, could you please help me with the selection of proper physics/coupling in the case of modeling acoustic wave propagation in solids (rock). Acoustic waves excited by the electrically powered...
View ArticleModelling a matrix filled with randomly dispersed fillers of varying size
Hi there!I wish to model a composite, containing randomly oriented fillers of varying size and loading fraction. The interfacial properties of the matrix-filler interface will also need to be input. Is...
View ArticleConvergence issues with 2D DC discharge in Plasma module
I am trying to model a 2D DC dishcarge in nitrogen with an external circuit.I tried both by using an external circuit physics and using the COMSOL's inbuilt series RC circuit.I could not make much...
View Articleinterior boundary condition
I am frustrated by a modeling problem using comsol, where a slug is moving in a capillary and a continuity of tangential velocity is needed at the interface. But I have no idear about how to define...
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How to make micromagnetic balls swim in the magnetic field
This is a paramagnetic microsphere. Put it in an aqueous solution. If you add a magnetic field around the rectangle, how to simulate the movement of this microsphere in the magnetic field? Mainly...
View ArticleLaser heating of very thin surface
Hi, I'm trying to make a model of laser heating a very thin plate of Al, and have resorted to a swept mesh to even get the mesh down, as Comsol wont mesh it otherwise due to size. I have the laser shot...
View ArticleAcoustic optimization
Dears,I am completely new with Comsol and have problems optimizing the shape of the horn. The main issue is to determine the expression for maximum acoustic pressure in a defined point. I would like to...
View ArticleCustom Boundary Condition With Identity Pair
Hi,I'm working on a 3D geometry within Solid Mechanics physics where I'd like to impose a constraint that relates the displacements of one surface (destination boundary) to another surface (source...
View ArticleMesh Errors for Complex Geometry
Hi, I've been struggling with meshing a very large geometry(36x16x8m) with some very small elements(0.1m radius vents,etc). I simplified my geometry to practice meshing separate domains and was trying...
View Articlegrating resonance structure, reflection greater than 100%
Hi, I am simulating a grating resonant structure, I use the floquent peridoic condition and PORT 1 input TM wave. The incident angle is 45[degree]. But the transmittance and reflection(abs(ewfd.S11)^2)...
View ArticleCapillary pressure
Hello!I'm trying to simulate sessile droplet deformation with taking into account capillary pressure. To calculate capillary pressure I use Weak Form Boundary PDE which defines the curvature radius of...
View ArticleConnecting homogenized multi turn coils
Hi,I'm using multiturn_coil_assymetric_conductor from the application library as a template for my project. The attached picture shows my geometry. There are two homogenized multi turn coils surrounded...
View ArticleCan't find any S-Parameters data
Hello, I'm Rara, Im doing my research on metamaterials for hyperthermia treatment. I've just finished with my Complementary Split Ring Resonator (CSRR) simulations. I found the cut off frequency. But,...
View ArticleBicarbonate buffer equilibrium and diffusion
Hello,Does anyone know how to couple equilibrium reaction (for bicarbonate buffer) and transport of diluted species ? I was able to build both physics separetly bu I can't see any coupling between them.
View ArticleWhich numerical methods are used by the solver?
Hello! I am using COMSOL 5.4 for simulating a magnetic colloidal solution and I am interested in knowing which numerical methods it is using to solve the differential equations. Is there any way to...
View ArticleSimulating 2 COMSOL modules
Hello,I'm trying to simulate my physical setup for my master's thesis in COMSOL. It involves the creation of a magnetic field through applying a current to a copper-made solenoid. The magnetic field...
View ArticleModelling stress dependent elasticity
My Young's modulus changes with stress. I defined a function for Young's modulus versus stress. I tried to use weak contribution and auxiliary dependent variable to solve the problem with the circular...
View ArticleModelling stress dependent elasticity
My Young's modulus changes with stress. I defined a function for Young's modulus versus stress. I tried to use weak contribution and auxiliary dependent variable to solve the problem with the circular...
View ArticleConvergence problem
Hi,I am running a natural convection model and I put the material properties as a function of temperature (interpolation) and piecewise functions. I got results with constant number for the properties...
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