Plotting Electric Field Gradient and "Dome-shaped" Electrical Field of...
Hi I am using AC/DC module to simulate the electric field distribution over a microelectrode when applying AC input voltage. I manged to get the total electric field distribution E (V/m) over the...
View Articlehow to define a variable in livelink with matlab which changes in a loop?
hi, I have a problem to define a loop in livelink. In the loop geometries with different shapes are created. The problem is how to define a parameter varies in loop? The .m file is attached below....
View ArticleWhich Comsol model should be used?
Hello, everyone, I am a very new user of comsol multiphysics of v4.3 I want to find out if there is any model which can simulate how cement is displaced in horizontal wellbore. Many thanks for your...
View ArticleWhat does this notation mean?
Dear Comsol users In the document http://www.pksez1.com/Modeling_PIN_Photodiodes.pdf which describes the simulation of a PIN diode, the author writes in Table 2 for the doping concentration N the...
View ArticleBest solver for non-linear, time-dependent superconductor model
Until now, I have used Comsol 3.5a for modelling highly non-linear, time-dependent superconductor problems. The solver I used for this was UMFPACK, which performed best out of all the available options...
View ArticleCouple different interfaces
Hi! I need to know how to couple different physics modules in Comsol 4.2. I have a global ODE interface and a transport of concentrated species interface, and I need to couple them. I need to solve...
View Articlefemur modeling
Can anyone help me with how to finely model the femur bone on COMSOL without using the import module.Any help or suggestions would be welcome.
View Articlesolid mechanics module help - using displacement to solve for force
Hello, I am working with the Solid Mechanics module to take experimental deformation data of a bead in a gel and known material properties of both the gel and bead to calculate the force acting of the...
View ArticleCharged Particle Tracing Equations
Is there a way that I can change the underlying equations for the Charged Particle Tracing Module? I have a constant electric field created, but instead of the particles passing through it feeling a...
View ArticleCombining 1D and 2D physics in a simulation
Hello, I want to do consecutive 2D and 1D simulations of different Physics on a model. For example, I want to solve the electrostatic equations inside a 2D structure then I want to solve Schrodinger's...
View ArticleDrude, Lorentz, Johnson and Christy
Dear Fellows, I have a question which is not related with software but with some functions which we use in software. I have to model optical antenna (gold on glass substrate). It is very common problem...
View ArticleHow to draw a spherical dome?
Hello all, I am very new to Comsol. I am trying to draw a three dimensional spherical dome and mate it with a rectangular box. I have successfully drawn the box with a circular opening on one face. I...
View ArticleHow to cause flow around a bluff body to go unsteady
Hi all, I'm simulating turbulent flow in a pipe around a bluff body with time dependent solvers so I can look at the vortex shedding that occurs. I'm solving the RANS equations with the standard...
View ArticleObtain two simulations, RF Module, 4.2a
Dear All, If I do some simulations from for wavelengths from 400nm to 1300nm, and after that from 1300nm to 2500nm, is there possible to obtain these two results in one? Thanks in advanced.
View Articlepoint plot
i have simulated distribution electric field, and in potential i put as fucntion of cosine (V*cos(2*pi*f*t)). and i want to visualize the result in graph especially in specific point in volume. and i...
View ArticleInconsistent Units
Hi, I´m trying to incorporate the following expression on Subdomain expressions: D=0.926*T^2.5/(T*245) the result should be in mm^2/s, but It shows me "Inconsistent Units" even when I try the...
View ArticleRayleigh-Plesset bubble response
Hello everybody, I try to model an micro air bubble in water under an incident ultrasonic pressure field. In near future I hope to be able to add walls to the system, therefore I need a model which...
View Articleline integration of scalar field for use in study, not as result
hello, i am having great difficulty figuring out how to use a line integral inside of a study. for example, i am seeking to use the line integral of a temperature field (1st interface) across a line in...
View ArticleVoltage drop across a thin spherical layer
Hello, I’m modeling the voltage distribution for two mediums separated by a thin spherical layer. I’m using a contact impedance boundary condition to simulate the thin spherical layer that separates...
View ArticleDefine an interpolation function in 3D: Mesh interpolation failed
Hi, I am trying to define an interpolation function and I have some troubles. I work the Comsol 4.0. I want to interpolate data in 3D block. The txt file has the following content: % x y z dok x1 y1 z1...
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