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Custom Drug release plot for tds

Hello, I am working with the transport of diluted species module. I have an implant that will release a drug into the eye. The drug will then diffuse through the eye.I however need to implement a plot...

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Self intersections not supported when meshing a solid

Hello, I am currently working on a 3D simulation of the blood flow in the aorta, for this I reconstruct the model from DICOM files in 3DSlicer, afterwards in meshmixer I cut the inlets and outles in...

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Unexpected Complex Frequencies in Acoustic Eigenfrequency Solver

I have a simple 3D model, with which I'm analyzing the phononic band structure, similar to this blog post: https://www.comsol.com/blogs/modeling-phononic-band-gap-materials-and-structures/. I'm seeing...

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Interpolating multiple heat fluxes along a boundary

Hi,The input data for a model Im creating consists of heat flux data specified at individual points along the edge of my geometry. Is it possible to interpolate this data so I have smooth application...

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floor heating

Hi there, I am trying to build up model of the room with displacement ventilation in combination with underfloor heating (adding window and solar radiation later on). Physics like Turbulent flow...

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How can I know every bubble perimeter for multiple bubble system in level set...

Hi, everyone,I have a multiple bubble case in level set. My goal is to find the perimeter of each bubble. Is there a way to use integration operator and find each bubble size?Thx.Sincerely

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Using the solution of a 3D simulation in a 2D simulation

Hi, I am wondering how it is possible to use the solution of a 3D simulation (comp1) in a 2D simulation (comp2)? I have created the 2D geometry by cross-sectioning a 3D geometry at z=0[cm]. The 3D...

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Poor man's import geometry

I was wondering if anybody here could suggest, if possible, how I may create a 3D geometry in Comsol from an imported STL file. The STL file is a scan of a femur, with two distinct regions: the inner...

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Laser Heating Self Guided tutorial - where is it???

I hate to make such a trivial request, but I'm wasting too much time searching:Through a google search, I found a PDF tutorial from COMSOL called 'Laser Heating – A Self Guided Tutorial' at...

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Undefined variable: tpfmm.iNz

Hi! I am trying to model electrowetting in a microfluidic chip using the laminar two phase flow, moving mesh (tpfmm) physics. Unfortunately, I've run into this error: Undefined variable:...

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Ryzen 2700X or i7-8700k?

Dear all, For a moderate sized model (30 min), what is the difference of performance between these two CPU's, assuming RAM and SSD are not the bottleneck?

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Strain Energy Release Rate (G)

How do I calculate the strain energy release rate (G1) for an edge crack by using strain energy (U). Using the formula G1=d(U)/d(Area) and with constant thickness and plane stress case:...

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Parameter sweep on load cases : (B load cases --> A x= B for one inverted A)

The below post is related to an archived discussionHelloI have the same problem presented in thread/146031 I would like to know please if this problem has a solution now with version 5.4 of COMSOL....

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Johnson-Cook material model

Dear COMSOL users. Can you help me in topic 'how to define Johnson-Cook material model for analysis coupled thermo-mechanical problems'. I want to use it for simulation of beahvior of temperature...

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Graphic "halved" in the plot window

Hi I'm using comsol 5.4 under Ubuntu 16.04 with an HDPI display. The graphics in the plot window is half of the area available for display. Clicking on that area one can select the object as they are...

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Frequency dependend amplitude of a monopole source

Hi,I like to use a monopole acoustic source but with an amplitude that varies with frequency. Is this possible ? I could imagine to have an acoustic source with an amplitude vector and a frequency...

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merging surface plots from 2 different comsol models (2 different files)

Hi, I wonder if it is possible to merge surface plots from 2 different comsol models?Many thanks, Regards, Asal

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Pipe module compatibility with 3_D CFD heat transfer module

I have been trying to simulate a non-isothermal mixing tank which is continuously introducing two different fluids from a long winding pipes. The pipe module (which is a 1-d model) with 3D CFD works...

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Large deformation

Hi, I'm working on the fracture of hyperelasticity material recently. However, the problem of inverted element always occurred when the material undergone a large deformation . Is there any proper way...

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Undefined value- NaN or Inf found when solving linear system using SOR

Hi, I have a patch antenna which was working on 900 MHz frequency. It was working well and giving the results. However, when i change the frequency to 10 GHz. It is showing this error-The following...

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