User defined comsol permittivity diagonal can not change values?

Hello please i hope to change values of permittivity tensor wich is diagonal with different values but i can not i use comsol software help

07 August 2018 6,571 0 View

How to simulate a carbon nanotube to trace the electron dispersion as well as the energy bands using the comsol?

how to simulate a carbon nanotube to trace the electron dispersion as well as the energy bands using the comsol

03 April 2018 5,829 0 View

The calculation of the bandwidth at -3dB, -10dB or -5dB ?

hello everyone is there anyone who can answer my question: The calculation of the bandwidth is done usually at -3dB, but I find in some works that this value of -3dB is different , for example Bw...

03 April 2016 6,909 3 View

Factorial theoretical structure is linked to likert scale response?

The theoretical factor structure of a questionnaire is linked to its Likert scale response? If I change the response scale this may affect the structure? For example, instead of using a scale from...

01 February 2015 7,198 7 View

How can I validate the qualitative food frequency questionnaire?

Given that the study objective is to seek only the usual food consumption without information on the portions?

01 February 2015 6,147 2 View

How can we use the GMRES algorithm for the following system?

good morningI read the article titled 'SINRD Circuits Analysis with WCIP' we can solve the equation system (10) by the GMRES algorithmSo to use the GMRES we must put the system in the form of...

11 December 2014 9,880 4 View

Is there a classification of foods according to their taste?

Is there a classification of foods according to their taste?

09 October 2014 6,274 4 View

What are the periodic wall boundary conditions?

What are these conditions and how can I choose the basis function?

03 April 2014 6,359 3 View

Carbon nanotube and carbon nanoube matamaterial

Is there a difference between carbon nanotube and carbon nanoube matamaterial? Is that the permittivity is related only to the carbon nanotube metamateial or it occurs also when there is a carbon...

31 December 2012 4,345 1 View

Is there any tutorial for comsol general projections?

Hi, im trying to make a projection in a 3d comsol model. I have a non uniforme chanel and my intention is to get the average tempreture in the y-z cross section and se the average tempreture...

02 March 2021 4,624 4 View

Is it possible to do piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch?

How to do Piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch? Piezoelectric coupling between the rectangular substrate and rectangular...

02 March 2021 9,833 3 View

How can i resolve the "final solutuin is not converged" error in Comsol for my heat transfer simulation??

I have been trying to simulate heat transfer problem in Comsol 5.5 for long time but it always throw an error stating: "Failed to find a solution. Maximum number of Newton iterations...

28 February 2021 8,626 3 View

How to use measure capacitance change in COMSOL time dependent study ?

I want to measure change of capacitance due to relative displacement between two parallel plates in COMSOL. Distance between two plates changes with time. So I'm using a time dependent study but...

26 February 2021 8,567 3 View

Error in comsol?

Dear respected researchers, while performing CFD analysis in Comsol it's showing like this Error: Nonlinear solver did not converge. The maximum number of Newton iterations reached can...

24 February 2021 249 3 View

What software programs can directly simulate Additive Manufacturing Directed Energy Deposition (DED)?

I understand there are a lot of software programs that can simulate DED by going through specific modeling, simulation, and commands. For me, that was time consuming and results were not accurate....

24 February 2021 4,428 3 View

How can I find the effect of different parameters like (Reynolds number, Hartman number, volume friction etc.) in COMSOL?

Here I am facing this problem. I don't find any effect of this type of parameters. I am a beginner user of COMSOL.

23 February 2021 9,086 3 View

RNA degraded after good nanodrop readings?

23 February 2021 8,850 2 View

How to Implement Elastoplasticity in a PCL model in COMSOL Multiphysics?

I am using COMSOL Multiphysics 5.5. I am trying to simulate the tensile test of PCL scaffolds. However, regardless of the strain, I have the elastic region all the time which is not true when it...

23 February 2021 4,050 1 View

Fictitious Boundary Meshing Method (FBM) in Commercial FEA software?

Is it possible to implement FBM in a commercial FEA software package, such as FEMLAB, COMSOL, or open source software like Moose?

22 February 2021 2,968 1 View