Implement Viscoelastic Maxwell Material?
I am trying to model a Maxwell material (https://en.wikipedia.org/wiki/Maxwell_material): a purely viscous damper and a purely elastic spring connected in series. I do see the viscoelasticity under...
View ArticleAccessing the values of an inbuilt variable at a particular point!
Hello,Is there any way, to access the value of an inbuilt variable at a particular point? I have a simple comsol model (file attached).In this model, under "solid mechanics module", there is a boundary...
View ArticleRLC series circuit
Hello,Could someone please help me model the attached RLC circuit please?Kind regards,Sinéad
View ArticleRay Heating Module
Hi,I have been using ray heating module to perform the ray tracing and heat flux simulations for a parabolic trough solar collector. I am having problem in seeing the temperature distribution and heat...
View ArticleWall contact problem will not converge
Material 1 (domain 1) is cooling down by defined time dependant heat flux. as it reaches a certain temperature (solidification temperature) it is activated. next to the material there is a wall (domain...
View ArticleAcoustic Intensity not evaluated as expected at boundaries with PMLs
Hi, I've been using the Pressure Acoustics interface to evaluate total power absorbed in a domain and have come across some unexpected behaviour. This has been driving me nuts for about two days, but...
View ArticleMaking a loop in comsol
Hi,I wanted to make a loop in COMSOL for the inlet temperature but this temperature would be different in each time step. Step 1: T_in(0s)=10C Step 2: T_in(1s)=T_out(0s)+T_load(1) Step 3:...
View ArticlePlotting Magnetic flux density in air using " Cut Plane data set "
Hi ,I'm building a three axis magnetic flux coils. I need to visualize the mf.Bx / mf.By / mf.Bz on desired planes. when i add a " Cut Plane " in dataset and select an XY axis and plotting the air is...
View ArticleLaminar fully developed flow through pipe
How can we a cut a cross - section in the volume plot to view velocity profile in a fully developed laminar flow thorugh a pipe?
View ArticleShould this be considered as a concentrated or diluted species? membrane...
Hello!I am fairly new to COMSOL, even after reading the manual and configuration book I still can't figure out which physics, I should use, concentrated species or diluted species?I want to model...
View Articlefrequency response in 3D structure
Hello I study about piezoelectric energy harvesting. I fabricated doubly clamped piezoelectric energy harvester array. And I am trying to simulation about frequency response, I practiced with the...
View ArticleGeometry Export to step file error.
HiI'm exporting my geometry to step file and im having an error " Unsupported topology in conversion to CAD kernel. "any idea how to sort it.regards
View ArticleHow to export model to MATLAB
I tried model=ModelUtil.model('filename') and got following error : Exception:com.comsol.util.exceptions.FlException: Unknown model Messages:Unknown model. - Tag: filename it seems like the model not...
View ArticleHow To Calculate The Scattering Cross Sections Of The Electric Dipole In Comsol
Hi I have calculated scattering cross section of a silicon sphere when a plan wave was illuminated on it. Now I am going ro replace an electric dipole instead of this plan wave and calculate the...
View ArticleIn comsol is it possible to set a BC for a couple of seconds and then release...
As states i am running a time-dependent simulation in solid mechanics. I want to set a prescribed displacement to zero for the first 0.05s and then release it to free. Is there any way that I can do it?
View ArticleHelp regarding PARTICLE DEPOSITION in COMSOL
How can I simulate dust particle deposition in COMSOL Multiphysics 5.4 software? There is an option for particle tracing, but I can't find anything where I can do particle deposition. So, can anyone...
View ArticleExternal Material Model COUPLED with other physics
Hi,I developed a mechanical constitutive model by using the External material model. I want to use the state variable calculated from the External material model, say damage or plastic strain, into...
View ArticleParticles size issue in particle tracing module.
Hi everyone. I have to trace the trajectory of a silica particle (6 micromiters of diameter) into a microchannel (L= 1.8 mm, h= 15 um, s= 55 um). Thus, the particle should enter the channel safely....
View ArticleBoundary Condition Assignment For Periodic Structure In COMSOL
Hi, all.I face a problem in COMSOL: boundary condition assignment for a periodic structure.In the attached image, a surface acosutic wave (SAW) sensor is shown, wherein four pressure forces (N/m) are...
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