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Absolute Value of Temperature at Discrete Time Periods
I am performing an eigenfrequency analysis and I want to find the absolute value of temperature (T) at each given phase of the oscillation. When I use the expression abs(T) COMSOL creates a profile...
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Permeability
Hi I'm modeling a laminated core with COMSOL 4.3 in 2D. I have defined the permeability of the steel with a BH curve. My model is working pretty good as we expected. I can plot the B and H on any...
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Torque through Maxwell Stress Tensor
Dear all: Recently I tried to implement a similar problem to the one presented in the following poster. The goal is to obtain the force and the torque over a particle that is illuminated by an...
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defining function depending on 3D spacial coordinate vector and time
Hello, I am quite new to Comsol, and I would like to create a function depending on the 3D position in the coordinate system of my geometry and the time. It would create a space and time dependent...
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Modeling Magnetostriction - mod1.Azy variable
Hello I'm modeling magnetostriction in a laminated core in 2D. I have studied the '''non linear_magnetostriction'' model in COMSOL and have compare my model with that. In my model everything looks...
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Problems modelling a microstrip resonator
Hi there, I am trying to model a microstrip resonator with COMSOL and I am having some problems with it since it's the first time I use this software. Basically I followed the steps on the example "...
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Selection with name
Hi, I am a new student to start COMSOL. I have some questions in selection domains: When I import a model and try to follow the description, I need to select the right object, but I need to try one...
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Step function for battery module
Hello. I would like to create a discharge and charge cycle by using a step function. It is for Li-ion battery. I've managed to create only one pulse by define equation for discharge and charge:...
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solving for Diffusivity
I am using the Transport of Dilute Species Module(time dependent study) for my project. In this module I am required to solve for N according to the equation N=-D∇c where D is the diffusivity and c is...
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What is "Thickness" in a 2D model?
Hey all, In the piezoelectric transducer (pzd) and structure mechanics (solid) physics, there is a "thickness" box in one of their trees. I already draw the thickness of my domains in the geometry. I...
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Challenges of matching the results of 2D axisymmetric and 3D for a cylinder
Hello everyone: I am modeling the transport of diluted species in a cylinder in 2D axisymmetric and 3D domain. I could not match the simulation results of the 3D model with that of the 2D axisymmetric....
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reservoir modelling with two phase linear poroelasticity
Hi everyone, I have a question: is it possible to create a two-phase reservoir model in Comsol by using Subsurface flow Module (Poroelasticity)? Thank you all Giulia
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Displacement limit in electromagnetic actuator
Hello all, I am trying to simulate the displacement of a plunger in an actuator due to the effect of the forces ( the model includes permanent magnets and a coil), so for my transient analysis I am...
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Modeling Negative Stiffness Structure in series with resin (large strains)
Hi, I'm modeling a metal NSS with a block of resin on top of it in 2D. I've set two constraints: fixed constraint on the bottom of the structure and prescribed displacement on the top of the resin. In...
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Creating geometry dependent force
Hi, I try to create a force that dependent on an angle, to simplify earodynamic forces. Therefore I created a variable "Angle" under definitions: Angle = asin(-t1z). To check if my formula was right I...
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Numerical study of laminar natural convection inside square enclosure with...
Dear All While validating a paper based on Numerical study of laminar natural convection inside square enclosure with single horizontal fin, I am not being able to get results and visualization...
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to create hole in a thin film
I am facing problem to make holes in a thin film. I made a thin film using 'block' in geometry. Now I need to create holes of rectangular shapes in this film. Thanks Kal
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How to get comparable results from several different comsol projects?
Hi, I have built several different 2D models and get result figures from each of the model, I want to know whether it's possible for comsol to draw one figure with all these results in it. For example,...
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Friction in Frequancy Domain Studies
Hi Everybody, Has anybody applied friction force in a frequancy domain study before? I am trying to apply the friction using the friction subnode under the contact node. However, I am not sure if I do...
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Post-buckling study
Hi all, I was working on post buckling study. The geometry is a cylinder with internal mass connected by beams, the buckling point should be when the internal mass start to rotate(so the beams buckled)...
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