How to solve "Feature: Stationary Solver 1 (sol1/s1) Attempt to evaluate...
Hello everybody, I’m working on a simulation of a tubular reactor for secondary reforming. Since my 3D simulation run resulted in error, I decided to face the same situation with a 1D model, but the...
View ArticleEigenfrequency, frequency domain, frequency domain modal and mode analysis...
Hi,Could someone please explain to me what's the difference between eigenfrequency, frequency domain, frequency domain modal and mode analysis studies?I'm preparing a setup and I'm not sure which...
View ArticleHow to simulate water falling under gravity and impinging on a curved...
Hello,I am attempting to simulate water, flowing out of a hole/slit, at the bottom of a tank (under the influence of gravity); entering into a domain (vertically downward), that contains air, and...
View ArticleEquivalent to Conductive Media DC model version 3.4 in Comsol 5.3a
Hi, I have an issue for calculating the current in ground and i want to know the equivalent for the old model Conductive Media DC model version 3.4 in Comsol 5.3a..Kindest Regards Samar
View ArticleSaving file between runs in a parameter sweep?
The IT department where I work is a stone wall that will not budge. I run a simulation over the weekend, come in to find my computer had been restarted by automatic updates and now I have to start...
View Articleboth shells and solids
Hi How i can model the viscoelastic sandwich plate (top and bottom layers are elastic, and core is viscoelastic) using both shells and solids.
View ArticleIntegration operator on element level???
Dear all,I want to integrate the independent variable on each element, rather than on the whole geometry. But there is no corresponding operater in COMSOL. Does anyone have experience about that? Would...
View ArticleA problem about the well boundary condition in the Darcy's law module
There seems to be a problem with well boundary conditions when simulating reservoir production processes by the Darcy’s law module. I assigned Neumanna boundary conditions (constant mass flow) to the...
View ArticleHow to apply two or more interpolation schemes when using Topology...
Dear Mr./Mrs.,The latest COMSOL 5.4 version has integrated the Topolgy optimization node in "definition". The filter as well as the projection can be accessed more conveniently compared with previous...
View ArticleStep function in a time-dependent problem
Hello everyone,I am trying to implement a step function in my time-dependent problem where I want to lower the temperature of a constant temperature boundary from 40°C to 20°C after 10min (600s) of...
View ArticleHELP FOR Studying current distribution in a grounding grid
I'm studying current distribution in a grounding grid buried at depth h=100 m below the earth surface . I am using magnetic and electric field interface in AC/DC module.Normally when current flows in a...
View Articlehow to use step function?
I want to apply a current in electrochemistry model. However, if I set a step fuction to the current, where do I use the step fuction?
View ArticleHave problem with Particle Tracing for fluid flow!
Hi everyone! When I simulation with Particle Tracing for fluid flow! I met one warning like this: "Some particles have been removed from the simulation because maximal number of wall interactions...
View Articlemodelling of metal hydride reactor
How can i use the heat transfer in porous media interfaces for modelling of metal hydride reactor (MgH2)? i need step wise procedure.
View ArticleHeat source simulation
Hi, I'm a complete comsol newbie. I'm trying to run a simulation that seems to be quite simple yet somehow I keep getting errors upon computing (usually the error is "The Relative Residual (x) Is...
View ArticleCan I use de Pipe Acoustics Module to study a pressure wave that came from...
I want to study how a pressure wave travel a long a pipe. That pressure wave came from explosion in a combustion motor. I'm using the pipe acoustic module, but the results in my simulations were...
View ArticleMeshing techniques in comsol
I want to know if any there are any meshing techinques that can solve a complex domain consisting of extremely small and sensitive domain elements. (finer than extremely fine). I am using COMSOL...
View Articleusing Prev operator
hello all,I am trying to create a condition were the solution of a present formula gets automatically added with the solution of the same formula from the previous time step. for this i used...
View ArticleTesla coil in comsol
hello, please I'm investigating how to transmit electrical power in the form of radio frequency from one coil to another, something like the tesla coil. radioactive and noninductive coupling. can you...
View ArticleTime Dependent Analysis of A Spiral PCB Coil
Hello, I am trying to model the magnetic field around a PCB coil during a tone burst excitation. I have modeled the PCB coil and the model runs correctly with a stationary study including a parametric...
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