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Can't get arrow volume plot arrows to point in the right direction
I'm trying to model flow inside a rotating pipe. I think I have managed to set up the model correctly, the results in most plots look intuitively correct. However, when I try the arrow volume plot for...
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Interpolation & Excel
Hello everyone, I'm trying to define a material property that is a function of two physical quantities. I'm doing that using an interpolation function with the data imported from an Excel spreadsheet....
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Transport in diluted species
Hi, I want to break my simulation into different time time intervals, can it be done in comsol? For example, my time interval for the simulation is (0,20,100) can I run the same simulation for...
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Input Multiple frequencies
Hello, In a pressure acoustics simulation that I am working on, I have the input pressure pulse of varying frequencies. I am doing a frequency domain study and the pressure wave is something like this....
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Moving Sprung Mass on Simply Supported Beam
Hi Any tips on how to implement a moving sprung mass on a simply supported beam? I know to how to correctly implement a moving load, but not a moving sprung mass. thanks!
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New to COMSOL: where can I hire someone to help with a finite element fluid...
I would like to hire someone to prepare COMSOL code for reproducing plots/tables from an old finite element fluid flow simulation. The numerics and coding are more advanced than what I'm used to and I...
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total weight calculation for a domain with variable density
I’m trying to model a polymer degradation process with Comsol in which I introduced degradation to my model by defining variable concentration of one of its ionomer blocks. Then I defined its Density...
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Solid to Shell Conversion
Hallo Everyone I have a model of a loudspeaker enclosure in solid. Due to the time taken in the simulation in 3D, Acoustics solid interaction module, i am thinking of using the Acoustics shell...
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How can I select a 8-nodes brick element in Comsol 5.1?
Hi, I want to mesh a femur with hexahedrons, but I am not able to do it, since Comsol uses tetrahedral elements by default. I cannot use the sweep feature due to the geometry. Could someone please help...
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How can the comsol use an image to set up a model?
I have got an image( in black and white) from my experiment, I want to make an model with the image not to just simplify the model with "circles", I heard about that comsol can do this ( transfer image...
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Where does comsol save the log file
Hi, I see an error message in the comsol GUI in 'Log' tab saying"An error occurred while solving for freq = 10000" I assume that I can find more details about the source of this error in an actual log...
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Measure for deformation
Hi, I am looking at the deformation of microwells in an elastic structure. The model is working, but I am having some difficulties extracting useful data from the results. I would like to know how much...
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Advanced Closed-Loop Control of COMSOL Model using Matlab
Hi I'm an experienced user of Matlab where I usually do modelling and simulation of a desired control object. The problem is, that the object I'm about to control contains some complicated dynamics,...
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Notification of solution
Hello everyone, As we all know, the time consumed by solving complex models is very lengthy. I cant just wait during computation. I have to go places else. Is there a way I can enable a notification...
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spiral coil
Is there anyone knows to draw spiral in 2D? I could find suggestions saying about drawing helix in 3D. But I purely want to draw in 2D. Kindly suggest me.
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Hoop stress, radial stress
Hi all, In 2d axisymmetric , how to plot the hoop and radial stress? (there are many stress options in the insert expression tab) Thank you
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concentration jumps in transport of diluted species model
Hello, I have transport of diluted species model defined on two domain with one interior boundary condition, and I want to define a concentration jumps at the interior boundary. Let's says the ratio of...
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Why is Storage model in Darcy's Law time dependent?
Dear all, A simple square using Darcys Law. If I use the default "fluid and matrix properties" and make all the material properties as CONSTANTS, the result is static even if I use time dependent...
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How to model a curved cylinder?
I have been trying to simulate a blood flow inside a vein in which I have assumed the vein as a simple curved pipe. In the geometry section the cylinder option is meant only for straight and hollow...
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Plot section of model
Dear all, I am stuck with a fairly simple probelm (at least I do hope so). I have calculated a 2D model and I want to plot only a small detail of it. My model has dimensions of x=0-0.01 m and...
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