Frequency dependent attenuation Transient Acoustics
Hi,I am going to simulate a transient wave propagation using COMSOL acoustic module. I have an arbitrary waveform which will be applied as a point source.I need to include frequency dependent...
View ArticleA question about ramp function in the "deep excavation" example
Hi all,In the ramp function in this example, the slope is defined as S_strut/U_max which has the unit of N/m^2, and the location is -U_max. However, when it is used as the force on struts, it has the...
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Issue with incident wave in Transient Acoustics mode
Hi, I have to model a multilayer plate in water and get the reflected and transmitted waves through it, with a transient incident wave.In the frequency mode, it's easy to put a background pressure...
View ArticleBending Beam Stress
Hello, I'm a new learner about COMSOL. Now I'm modeling a bending beam and want to simulate its stress. I create a 3D model and build a block(cuboid) suppose it's a beam. Then I fix one side of block,...
View ArticleStrange results with potential distribution
Hi,I happen to get some weird results while computing a parametric sweep over the distance of two domain point probes from the potential excitation source. With increasing distance from the electrode...
View ArticleProblem About Incentive Type Selection of Coil in 3D Model
Hello, I want to build a 3D model to simulate RF coil which is drived by power . But when I choicing the incentive type for the coil , there has no power type in the list . Though I can find the type...
View ArticleLinking the Thermodynamic Properties Database with the heat transfer module
Hello,I want to club thermodynamic properties package with heat transfer module for adsorption of CO2 on porous materials. I want to take properties of CO2 from this package because if take default...
View ArticleCapacitive Pressure Sensor
how i can change body material of Capacitive Pressure Sensor from Silicon to Graphene or any other material.....
View ArticleUndefined variable. - Variable: comp1.Ne
Dear Colleagues, I want to simulate a 3D MOSFET using semiconductor module. But, I am getting this error in the source domain:Undefined variable.Variable: comp1.NeGeometry: geom1Boundaries: 23,...
View ArticleMeshing Error
Hi,I'm trying to run a 3D fluid simulation. When the geometery is simple, everything runs fine. As soon as I add an angled rectange, it gives me the following error: Failed to create boundry layer...
View ArticleConcentric cylinder heat transfer with longitudinal fins
Hello Dears, I want to perform heat transfer in PCMs simulation in COMSOL Multiphysics 5.0a in concentric tube heat exchanger. The hot water will be flowing in the central pipe while paraffin wax will...
View Article3 questions about "Tunnel Excavation" example
Dear all,I'm a little bit confused about some points in this example and would appreciate any help.1- In this example, for initialization, we are using External Stress in solid2 and step#2 (from...
View ArticleStandard Deviation of Time-Dependent Solution
There is a feature that lets you do a time-average of your time-dependent data. I would like to know if there is a feature that will let me take the standard deviation of the same data sets.At the...
View ArticleIso2mesh mesh import to comsol
Hi,I am a regular user of Iso2mesh, MMCLab and COMSOL 5.3. I have been running my MC Simulations on Colin 27 Adult Head. Now I tried to save the mesh in mphtxt using the "savemphtxt" function. I was...
View ArticleA question about accuracy of Butler-Volmer kinetic equation
Hello, I have questions regarding how accurate butler-Volmer equation that applied for electrochemical reaction in batteries applications and models? if its accurate , Could you please provide a proof...
View ArticleCapacitive Micro-motor using the Electrostatics Interface - Results do not...
The below post is related to an archived discussionDear All,I am new to COMSOL but have managed to follow the following tutorial for a 2D simulation of a side-drive electrostatic micro motor using the...
View Articleparticle tracing in fluid flow after FSI time dependent study
Hello, Is it possible to run particle tracing after a time dependent study resulting from fluid-structure interaction problem? I did that but the particles do not capture the dynamics in the system, it...
View ArticleElectro-mechanical Impedance (EMI) Simulation
Dear all,I am simulating EMI in Comsol using prestressed-analysis and frequency domain module. There are two step this module including stationary and frequency-perturbation.In stationary solution, I...
View ArticleModelling Rubber layer in Comsol using MEMS
Hi,I am trying to model a rubber layer of 10 mm thickness in between two concrete layers. The aim is to study the damping properties of rubber upon application of dynamic load on the concrete surface....
View ArticleSeparation of nonmagnetic particles under the action of magnetic field
Hi I want to use magnetic field to separate non-magnetic particles in magnetic fluid environment, but after adding magnetic field, non-magnetic particles are not affected by magnetic field. Why ? I try...
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