Training courses
Hello, I was interested in learning how to use comsol for simulation of penetration of drugs in spheroids in peritoneal cavity tumors Is there any training courses given by comsol or textbook that can...
View ArticleDifference between available Hydrogen gas models
What is the difference between the following?Liquids and Gases > Gases > HydrogenMaterial Library > Elements > Hydrogen > Hydrogen [gas] > Hydrogen [gas, H2]Specifically with respect...
View ArticleIn the acoustic module, how to set the parameters of anisotropic materials
In the acoustic module, how to set the parameters of a material when the density of mass or the bulk modulus of elasticity is anistropic i.e. the density of mass or the bulk modulus of elasticity of...
View ArticleDeposited Ray Power
Hi all,I am modelling a Winston cone by using geometric optic engine. I'm sucessfull getting the ray trajectories but however when I computed the deposited ray power at the entrace aperture and the...
View ArticleSAW Device with IDTs
I'm trying to create a finite-sized surface acoustic wave device (file attached) with gold electrodes for the IDTs.Essentially, I'm creating an IDT similar to...
View ArticleDelete user defined material
Hello fellow COMSOLers,is there a way to remove materials from the user defined materials library. I already checked the forum and manual but cannot find anything.Any advice is greatly appreciated.Best...
View ArticlePlotting Coordinates for Specific Condition (Heat Transfer)
Is it possible to plot a graph of x,y coordinates for a specific temperature condition in COMSOL?I am taking a slice, similar to the one attached, out of a 3D model and looking to create a graph of the...
View ArticleElectric field - electric potential - AC/DC Module
Hello,I'm trying to simulate a photonic crystal with the AC/DC module. Does someone know why i'm having no variaton on electric potential or electric field when i changed the currently work frequency...
View ArticleWhy do Comsol and Ansys have different mode shapes?
Hi,I am doing coupling anaysis for structural vibration and acousitc pressure. I have compared the result from Comsol to that from Ansys, but they have different mode shapes. Since I do not use...
View ArticleEvaluating Objective function from only part of a parametric sweep
Dear all,I am sweeping an electromagnetic problem in frequency domain. If I am investigating for example frequencies 1, 2, and 3, is there a way to create an objective function that is only evaluated...
View Articlechanging air humidity
I am trying to simulate a model which consists of two electrodes. The electrode at the top is shaped as a cone and the one at the bottom is shaped as a plate. The plate is grounded and the cone is...
View ArticleBoundary Condition
I am trying to insert a parabolic boundary condition in the inlet of my pipe flow model. The equation is like U=Umax(1-(R/Rmax)^2); I do know the value of Rmax & Umax. But R is a variable one. How...
View Articlelock symbol in node
Can anyone explain what this lock symbol denote in comsol? Screenshot attached. Looking for a quick reply.
View ArticleElectric switch in circuit
dear all, Hoping all is well with all of you.Kindly how to make a switch in electric circuit.. kindest regards samar akef
View ArticleParameter estimation + Parametric sweep
Hi,I am tring to perform Parameter Estimation on a set of measured data. I am using a Stationary Solution to solve the Helmholtz Eq and a Parametric Sweep to vary the width of a wire. As you may be...
View ArticleDivision by zero, Failed to evaluate variable, Failed to evaluate Jacobian of...
Hello, I am using comsol to model conjugate heat transfer and fluid mechanics under turbulent flow regime. But I keep getting this error below:Division by zero. - Function: / Failed to evaluate...
View ArticleQuestion regarding COMSOL meta-material tutorial
Hello, I am looking to use COMSOL to create a simulation involving the interactions between photons and a resonator.I found a large amount of benefit looking through this tutorial on the matter...
View ArticleMagnetic Fields Time Dependent Solver "Failed to find consistent initial values"
Hello!I am attempting to model an oscillating magnetic field in the X-Y plane using 2 pairs of helmholtz coils connected to sinsusoidal current sources together with a steady state background magnetic...
View ArticleElectromagnetic Energy Harvester
We are currently trying to simulate an electromagnetic coil induction to generate electrical power. The system consists of static planar coil and vibrating membrane with attached permanent magnet...
View ArticleCOMSOL keeps giving error upon restart (vector parameter definition)
Hi!I tried having a vector as a parameter in the global definitions, but immediately it turned out it did not work (it turned red), so I deleted the parameter. Now, I am trying to make a simple app out...
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