Geometry 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...
View ArticleUnder a harmonic excitation, PZT on a CCCC plate
Hi,I use comsol to solve a problem about piezoelectric energy harvesting. There is a piezoceramic patch on a CCCC plate, and the piezo-patch is conneted to a resistive (by SPICE circuit editor). I have...
View ArticlePrinciple direction vectors calculated from External material model
Dear all,I developed a constitutive mechanical model by using the external material model. I want to use the principle vectors corresponding to the principle stress in other physics. However, I found...
View ArticleWhat determines computation time?
Hello,I have two different models, one uses the MFH module to calculate the magnetic field of a superconductor, while the other uses coupled MFH and MFNC modules to calculate the same magnetic field....
View ArticleElectric Field and Equipotential Surface Simulation Problem
Hi, I am a new user to COMSOL. Can anyone help me, please? I want to compute and plot the electric field intensity and the equipotential surfaces produced by two parallel plates at their midway and at...
View ArticleHow to fix the temperature of a domain to a constant value ?
I am using comsol 5.4 2-D axis-symmetric geometry. I have to fix the temperature at 300K throughout the model in all domains. How do I do this?
View ArticleHow to simulate a wall without using Contact?
Is there a way to simulate a wall without using the contact-node? I don't want my geometry to deform past a certain boundary. (which is horizontal, if that helps...)regards and thank you
View ArticlePointwise Constraint - Hollow Fiber Membrane Contactor
Hello! I'm fairly new to COMSOL and would like to make a simple modelling that happens in Membrane Contactor using Hollow Fiber Membrane (for ammonia removal).I figured out pointwise constraint may...
View ArticleMaximum number of Newton iterations reached
Good day,I am having this error after inputing a new function into the model. The new fucntion I inputied is the equation of density of CO2, which represent real gas condition, since what COMSOL has is...
View ArticleHow to sweep parameter in a function
The below post is related to an archived discussionIf I define a function with parameter, how could I sweep the parameter? As discussed long ago, maybe it is a bug.
View ArticleHow to create a finite set of numbers
Hello,I would like to use as parameters a set of (random) numbers. The random part is easy once you have a set of numbers, but it seems that you can only define scalar parameters. Is there a way to do...
View ArticleDisc space occupied by a mph file.
Dear All Greetings of the day. I have a doubt regarding the disc space occupiedby a mph fle. I am trying to simulate the corona discharge for a needle-sphere electrode with oil as a medium(Similar...
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System matrix extraction
Greetings everyone I have a model where I calculate a potential distribution inside a 3D model. Let us denote this voltage vector . The matrix form is where we impose the boundary conditions to . At...
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