Under 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....
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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 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 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...
View ArticleParticle deposition efficiency based on forces.
Hey, I am quit new to this software. I have done the particle depsoition simulation for my case. My study includes two forces, drag and gravity. Now I find to out of total (50,000) how many particles...
View Articlecyclic voltammetry
Is it really so that the ready-made cyclic voltammetry node is valid only for 1D? I am able to do my CV simulation in 2D or 3D by using the Transport of Dilutes Species node, but I stumbled to the...
View ArticleSimple heating in a 2D coil
I'd like to simulate the heating in a small thin wire copper coil in 2D. When current is going through the wire it heats up. This changes the resistance which increase the heat loss further. In the end...
View ArticleAbout The Combined Inductive/DC Discharge Interface
Hi,I am making arc welding simulation using this interface. Should I only define the current in the Electric Current interface and needn't to define the current density in the Magnetic Fields cuz I see...
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