S-function / Simulink based on COMSOL .m file ?

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How to vary thickness of surface unevenly in comsol geometry?

I have a tube with a fixed inside thickness. Now, I want to change thickness of some part of this tube to X mm and some part to Y mm. Rest of the part has no change. Moreover, the parts of...

02 March 2019 7,794 3 View

Are oscillations in COMSOL Water-Hammer example die down with respect to time ?

I recently saw an example of water-hammering effect example of COMSOL Multiphysics. The example shows that the sudden closing of a valve produces pressure-shock through out the pipe upstream to...

31 December 2018 1,553 3 View

Shell and tube heat exchanger in comsol is not converging ?

I'm simulating a shell and tube heat exchanger in comsol . I am plugging some of the tubes within the structure to see its effect on del.P and temperature. When I plug 18 of 19 tubes, and one...

09 October 2018 9,912 4 View

Wall lift off in CFD ?

Dear all, I want to know about the wall lift off in CFD simulations What's it's significance and why they are different in FEM and FVM? Moreover, if it only depends on meaning, then why in...

08 September 2018 4,895 0 View

Related to the MATLAB-Livelink functionality ?

I have a doubt: A : 1. If a parameter value (say 'x = 100 ') is changed in model via Matlab-Livelink (via Matlab coding) 2. model is run. After it, B : 1. Again the paramater value is changed...

07 August 2018 6,431 0 View

CFD and Aspen Plus Validation of Heat Exchanger ?

I have simulated a heat-exchanger in COMSOL. The same heat-exchanger is simulated (with the exact geometry ) in Aspen Plus. I'm facing following problems in above: 1. The results of Aspen Plus...

06 July 2018 6,118 0 View

Time Constant for a heat exchanger ?

I have a shell and tube heat exchanger (1-1 pass ). It has shell of 250 mm ID and tubes of 50 mm ID (# 19). Length is 500 mm. I want to know the time-constant for this heat-exchanger (approx....

05 June 2018 1,247 0 View

External material addition in COMSOL ?

Hello, I want to add an external material to the COMSOL for simulation. How can we do it? thanks.

04 May 2018 4,149 0 View

Using global variable in S-function ?

Dear all, I am trying to connect a function-file in MATLAB to Simulink via 2nd level S-function. But I have a global variable defined in my function file. Can anyone let me know, how to declare...

03 April 2018 1,430 3 View

Connecting COMSOL to Simulink ?

Dear all, I want to use the S-function in Simulink to connect it to COMSOL. I am able to use the Livelink and can import COMSOL model to MATLAB and can access the results. But my problem is as...

03 April 2018 9,752 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 set the environment variable for incorporating the GD3 dispersion in G16 for performing calculations using the OPBE functional?

I have incorporated the dispersion effect for the OPBE functional by specifying the S6, SR6 and S8 parameters for GD3 in Gaussian G09 package. For this purpose, I have defined the environment...

05 August 2024 1,494 2 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

Yashashri Patil

IT can only possible if simulink is having the same solver which is used in comsol. You can run the comsol .m file through MATLAB via live link.

Vasanthan Devaraj

I assume you have a license which runs along with livelink for MATLAB.

Please check the below video link for how-to-do.

https://www.comsol.kr/video/livelink-matlab-demonstration