Diaphragm
Hi, I am trying to do simulation of air horn diaphragm, Inputs: Diaphragm dia and thickness and material property. Input pressure on diaphragm. Output: Max deflection of diaphragm. Kindly provide me...
View ArticleSimulation time for 2D and 3D vastly different (with comparable DoF)
Hello, I have a question regarding relative simulation time for 2D and 3D structure. I am using COMSOL RF module to simulate an optical structure. When I try a 2D case with very fine mesh density and...
View ArticleParametric sweep and geometry change
a,b,theta_a and theta_b are global geometry parameters. theta_a = 2/a, and theta_b = 2/b. a,b,theta_a, and theta_b are all used in geometry creation. I am running a parametric sweep for parameters a...
View ArticleDiscrepancy between particle trajectory and streamline?
Hello, I'm trying to teach myself how to use the particle tracing module, so I'm modeling a simple T-junction microfluidic channel. I get an unexpected result, however, when I trace the particles....
View ArticleParameters calculation
Hello, I would like to ask if anyone know where I could find a full list or a list of the parameter comsol calculates when solving a model?. For example I know for piezoelectrics Y11 corresponds to the...
View ArticleInitial Conditions for Sine-Wave or More complex disturbances
Hi Everyone, I have reviewed previous posts in Comsol forum about I.C . One of the suggested ways of applying the I.C was to do a stationary analysts before the time-dependent one. (This can be true...
View Articletime dependent boundary conditions
hello all.. i am solving a time dependent heat transfer problem.. at the start ,for a rectangular domain boundaries 1 and 2 are insulated and 3 and 4 are assigned with constant temperature.. after some...
View ArticleError-System matrix is zero
Failed to find a solution. System matrix is zero. Returned solution is not converged. Can anyone please explain me about this error?
View ArticleLithium ion battery 1D model: solver error
hi, I am trying to solve the Lithium ion battery model from the model library (li_battery_1d). I am always getting this error message while solving study1 in it .Please help me on this. Repeated error...
View ArticleHow to integrate a table result
Hello, I have calculated surface integrals for total flux over particular features in my geometry. This outputs a table of total flux in (mol/s) vs. time points. I would like to then be able to...
View Article2 sets of PDE equations with same variable
Dear all, I have a Comsol model in which I have two almost identical sets of general PDE equations. This is because i first solve them with a stationary solver to find stable initial conditions and...
View ArticleMagnetic Force on an armature
Hello I'm dealing with a very simple problem that has been very frustrating for me! I would appreciate if any one can assist me with that. I'm modeling an E-shaped core in 2D magnetic field module. It...
View ArticleIs Cap Face feature is existed in COMSOL 4.00
Hello, I am wondering if someone still uses COMSOL 4.00 and can guid me how to block some holes in my geometry. Is Cap face is existed in COMSOL 4.00 as its in COMSOL 4.3 Many thanks Faisal
View ArticlePlot a formula
Hi, I am trying to do simulation of resistivity changing versus deflection of a membrane. the membrane is subject to an input pressure from range 0 to 100[kPa]. I simulate the model parametric and...
View ArticleIn joule heating ,how to compute the resistance of a body?
In joule heating ,how to compute the resistance of a body? can you tell me the formula? such as voltage is V, the symble of current is what and the symble of resistance is what in comsol? Thanks a lot!
View ArticlePhysics for a elastomeric vibration isolator.
Good morning. I'm almost finished with my model. The model consists in : 1 - Base. ( Base ) 2 - Elastomeric Rubber. ( Borracha) 3 - Lid. (Tampa) 4 - Screw Hole.( Parafuso ) The Screw Hole receive the...
View ArticleVolume at constant temperature
Dear all, I am using the heat transfer module to simulate heat flow through a rod. The rod is connected to a piece of copper that is held at a constant temperature. The problem is that Comsol only...
View ArticleMeshing and convergence problems
Dear Comsolians, I was finally able to draw the problem in 3D in Comsol :), am also a beginner, lol. The way I have modeled the coils is that they do not form a complete closed loop, thus I assigned...
View ArticleUncertainty in deflection of mechanical structures
I designed a silicon structure which is supposed to deflect in the transverse direction (Y axis) under axial buckling (compressive) force (applied along X axis). Even after increasing the number of...
View ArticleConstrains and laminates
Hello, id like to simulate a laminate with around 5 isotropic laminated layers. These layers are in the form of a plate with a constant area load. The model is a laminate for photovoltaics with area...
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