Flapping Wing Simulation
Hi,I want to simulate the stress which is acting on the wing while it's basically flapping. For simplicity, in 3D rectangular shape wing, I just tried to apply angular velocity in fsi-moving mesh...
View Articlemicrofluidic mixing via Acoustic Force
Hello all, I want to increase mixing efficiency in microfluic with H shaped microchannel via Acoustic force. But I have ni idea how to use Acoustic in my model and which interface I am suppposed to use...
View ArticleNoise (sound) Produced by Vortex shedding
I'm new to comsol so please bear with me. I wish to know the sound produced and propagated by vortex shedding of air flow over a cylinder. Do I use the Linearized Navier-Stokes, Frequency Domain (Insf)...
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Help: simple simulation of the concentration battery
Hello everyone. I have been plagued by the simulation of the concentration battery recently. the model like this: WHO CAN HELP ME I am truely thankful my email: chenxu2656@gmail.com
View Articlemicro pattern on circle
Hi i want to create micro rectangular pattern on circle circumference like the figure in the attached file, i need help regarding this.
View ArticleThermal coupling on shell elements
Hello everybody, I am trying to ceate a thermal contact between two plates. I created medium surfaces to model the problem with shell elements. I am using the physical interface " heat transfer in...
View ArticleHow to simulate using wave optics a model of big dimensions
Hello,I'm trying to simulate using the Wave Optics module what happens when a light source (450 nm) is intruduced in a device with certain geometry, how the electromagnetic field develops throughout...
View Articleproblem of point source amplitude in The Pressure Acoustic, Transient Domain
hi, I'm doing a simulation about the pressure acoustics transient domain.In my simulation,I use a point source as the input,and define the wave shape of the point source as sine wave.The problem is...
View ArticlePressure Drop Black Box
I am modeling a facility exhaust system at a plant in order to properly balance the system with new additions we are planning. In this exhaust system we have a filter bank where there is a pressure...
View ArticleFailed to find a solution
While running a simulation on my 3D model, I encountered a problem that reads:Failed to find a solution. Maximum number of segregated iterations reached. Returned solution is not converged. Not all...
View ArticleIncorporating Pressure into an Electrostatic Study
Hi,I'm trying to perform a partial discharge analysis in cable insulation using COMSOL.I would like to incorporate pressure into a void in the insulation (e.g. 101 [kPa]).How would I do this in an...
View ArticlePower and Intensity in acoustic model
Hi everyone,I am using the acoustic module for performing simulations of a piezoceramic tube immersed in water. Plotting the acoustic intensity profile along the axial direction at the center of the...
View ArticleHow parallel my model can run?
i am working on a simple time dependent simulation that include a single domain of a conductive gas (custom made T dependent material ) with electric current + heat transfer in fluids interfaces, so...
View Articlemathematics and pde
my variables are Ve1, Vi1, U1.In pde equation when I substitute these variables in the source term, they appear in light brown color.Why is this so? Attaching screenshots.Somebody please help/ Thanks...
View ArticleUser Defined Shear Dependent Viscosity
The below post is related to an archived discussionI came across the exact same problem as mentioned in the linked threat. I am trying to define a dynamic viscosity based on the temperature / shear...
View Articlehow to assign a tangential force on a parallelepiped's surface
I'd like to know how to assign a tangential force on a parallelepiped's surface. I had assigned a normal force using the command nx in x direction and selected the right surface , but I don't Know how...
View ArticleLorentz force not interacting in the turbulent flow k- ε model
I am trying to perform a 3D fluid flow simulation, for calculating the velocity in the fluid caused by Lorentz force(from electromagnet coils). I am having a problem of interacting the Lorentz force...
View Articlehow we can update RF module
Hi i want to update RF module of COMSOL (version 5.1). how i can? can anyone help me?
View ArticleThermal Boundary Resistances
I'm modelling the thermal characteristics of a thin-film transistor.In addition to the thermal conductivities of the materials in the stack, I'd like to include some thermal boundary resisistances (in...
View Article5.3a Demo: Battery Capacity Fade.there is a strange phenomenon
Recently, I used this example to simulate battery aging. I found that charge transfer resistance(Rct=Overpotential/Local current density) of the battery is not a normal change during battery aging.In...
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