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How To Create Cross Section In 3D
I have been simulating Mie scattering in 3D by using symmetry so that only 1/4 of my model has to be solved for. The problem I have is that I would like to plot the solutions of the full model with 1/4...
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Different results of Simulation from Solid Mechanics and shell
Hello, I have a problem when doing a simulation with a bend pipe meshed by shell element. The results of principal strains are one time larger than meshed by solid mechanics. But the results of...
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dependent variables: sweep over "initial values" and "variables not solved for"?
Hello all- I have 2 Studies in my 2D model: Study 1 solves for various fields within my geometry. These fields are different for each wavelength (lam0). Study 2 takes the lam0-dependent fields from...
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How to export data on selected points
Hi All I have 1D line plot and I want to export the data of the plot on selected grid points, not the entire plot. Any Idea or suggestion would be of great help. Regards, A.
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How do I load arbitrary current to the coil in comsol?
In comsol, I want to give the coil arbitrary current defined by interpolation, but it always wrong. My specific approach is: (a) the global definition, using interpolation method defined excitation...
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Using a function for Permeability value
Hello! I am new to the software. I am modeling fluid flow through the annulus of a pipe coupled to a porous media and am using the Free and Porous Media Flow physics interface. The permeability of the...
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Two consecutive physics simulations
I'd like to run one physics simulation (solve for 2D electric field given a particular electrode geometry), and then use the output of the first simulation (the electric field distribution) to input...
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Natural convection in heat transfer
I am solving natural convection problem for 5hrs in which first problem start with conduction and finish with natural convection effects for solid liquid interface location. During first 1 and 2hrs the...
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Post removed for no apparent reason
Dear administrators or moderators, i posted a Discussion the other day about getting wrong results in the AC/DC module and it was removed. Now, i just read again the "Rules and guidelines" and could...
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Modelling coils near resonance frequency
Hi, I'm modelling an eddy current testing probe using the AC/DC module. It essentially consists of a transmitter coil with an applied input current and also a receiver coil which will have an induced...
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Electric Currents and Transport of a Dilute Species to Generate IV Sweep Plots
Hello community, I've created a working and functional model that shows the migration of two oppositely charged species over time in response to an applied electric potential through the bulk material....
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Photocurrent calculation in RF module
Greetings I have a solar cell (silicon brick) with metallic rods on the top surface. This is well known structure to enhance the solar cell responsivity with plasmonic effects. So I want to calculate a...
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Element killing during laser melting
Dear friends I am working on laser cutting with moving heat source with subsequent stress analysis. I have successfully simulated the thermal analysis . However, I dont know how to delete/kill those...
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simulation of deformation after removing fixed constraints
Dear all, I want to simulation the final deformation of a plate after removal of its bottom fixed contraint I have a solid plate with its bottom fixed to the ground. Its temperature changes from 70...
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Convection-diffusion equation and/or advection equation: incorrect solutions
Hi, I have been working with the convection-diffusion module of the COMSOL Multiphysics module (version 4.3a). I want to study how a charge density (a cloud of electrons) drifts horizontally and...
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Parallel Computing with MATLAB Livelink and COMSOL
Hi everyone, I am currently trying to use Matlab's Global Optimization tool (specifically using genetic algorithms) with my function. Every time my function evaluates, it loads a model file, modifies...
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How do I write three functions to one in comsol?
Excuse me. I want to ask a question. when 0=<t<=1, the function is f(t). When 1<t<=2, the function is g(t). When 2<t<=3, the function is h(t). How can the three functions be written...
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Force calculation gives N instead of N/m
Hi, I draw two beams next to each other in cross-section (a 2D simulation) and apply 1V to one and 0V to the other, and solve for electric field. When I do a Force Calculation in COMSOL v4.3a for beam...
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Different current at two ports
I am simulating a device in electrical currents model, and find the currents in the only two port are not the same. And what is more, the current in the electrode with higher voltage is confusing. I do...
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Maximum number of Newton iterations reached
I have imported a 3D meshed model from simpleware to COMSOL 4.3b. Some of the materials of the model are Hyperelastic, Neo-Hookean. While running the model via Direct Solver at 99% of progress there is...
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