Simulation in COMSOL?

More Amir Tahmasebi Boldaji's questions See All

How I should simulate the EMAT in Comsol? Which Modules or physics I should use?

How I should simulate the EMAT in Comsol? Which Modules or physics I should use? Any one can help me?

09 October 2017 3,374 1 View

Problems about acousto-optic coupling in Comsol, how to check whether the moving mesh is correct?

I’m trying to reproduce the acousto-optic coupling simulation in the paper Frequency–angular resolving LiDAR using chip-scale acousto-optic beam steering. LNOI(lithium niobate on insulator) is...

13 August 2024 9,795 0 View

How to get LP fiber modes directly from Comsol?

Hi there, I'm new to modelling with comsol. I would like to ask if it is possible for comsol to output linearly polarized (LP) modes? I tried modelling a simple single mode fiber with an enlarged...

23 July 2024 4,019 3 View

Can anyone help with this comsol error? Pleaaaase I need help !!?

Undefined variable. - Variable: comp1.cNa - Géométrie: geom1 - Domaine: 1 Failed to evaluate expression. - Expression: comp1.cNa - Affichage: Graphique sur ligne 1

19 July 2024 1,938 2 View

Why electrical charge on the moving plate increase?

Hi, everyone This figure depicts a simulation of an electrostatic energy harvesting system in COMSOL Multiphysics software. My question is regarding the relationship between the changes in...

19 July 2024 4,694 4 View

Why does the error "The relative error (0.29) is greater than the relative tolerance" appear in Comsol Multiphysics?

Hello, My name is Radu Jubleanu, I am a PhD student at the Politehnica University of Bucharest. I work in the field of magnetic storage in superconductors. I want to carry out a numerical study of...

15 July 2024 6,025 1 View

How to use stress and displacement results from 1st stationary simulation as initial conditions for 2nd eigenfrequency simulation in COMSOL?

Dear All, I am trying to define the dispersion curves of a periodic unit cell in COMSOL Multiphysics with prescribed displacements. I am using two separate studies: - Study 1: Stationary, with...

13 July 2024 7,855 1 View

I have need a LPBF/SLM model on comsol multiphysics ?

In this model clearly understanding how to active one layer to another layer and how to add powder material properties step by step.

08 July 2024 6,147 0 View

Is it possible to define exothermic processes in finite element software like COMSOL? If yes, how can this be done?

We aim to study an exothermic process and evaluate its temporal changes. Could you recommend suitable software for this purpose and explain how to conduct this analysis? What specific data is...

30 June 2024 8,413 1 View

Has anyone simulated Argon plasma jet in Comsol?

Hello, Has anyone successfully modeled 2D argon plasma jet using the COMSOL? I would greatly appreciate any guidance on this matter.

30 June 2024 5,597 0 View

COMSOL simulation of transient wave optics propagation is not physical?

Hi guys, I am trying to simulate a 1 ps long plane wave propagating in a dispersive material, with the wave optics transient module. According to the drude-lorentz model, when the frequency of...

29 June 2024 486 1 View

Turki Haj Mohamad

Same problem is discussed in this forum:

https://www.comsol.com/forum/thread/42763/fail-to-evaluate-variable-material-epsilonr13?last=2014-03-04T12:29:57Z

Amir Tahmasebi Boldaji

sorry, I didn't find any usefull information in this page

René Christensen

Looks like you perhaps have forgotten to mesh, or apply a physics to those domains. Since it is only 3 domains, go through them all to see if something obvious is missing.