Which simulation softwares can be used for designing a traveling wave tube?

Can anybody guide me towards a simulation software that can be used for designing traveling wave tubes? Any views about COMSOL multiphysics?

11 December 2017 9,946 2 View

How can I measure voltage at the port of an antenna in HFSS?

I have a plane wave incident on a horn antenna and would like to measure the voltage at the port of the antenna? How do I go about it? Waiting for some input.. Regards,

03 April 2017 5,897 9 View

What is optimum height and width of a rectangular port in HFSS?

Hello, I have a confusion with assigning a port in HFSS. What should be the height and width of the port for printed antennas, lets say a patch antenna or any other antenna. When I keep the width...

02 March 2017 4,223 4 View

How do I design phase shift array using circuit elements to control the pahse shifts?

I am interested in designing a beam steering planar array and would like to know a few techniques to introduce phase difference. I know a transmission line of different lengths could be used to...

05 June 2016 4,769 6 View

How can electromagnetic band gaps (EBG) be used efficiently for patch antennas?

04 May 2016 1,747 5 View

How to use "Activate slit condition on interrior port" in COMSOL??

I am designing a simple pyramidal horn antenna in COMSOL without using symmetry planes. When I try to excite it using a rectangular port it says I need to activate the slit condition. I am not...

01 February 2016 1,757 1 View

How do I set up free convection in comsol?

I want to see the effect of free convection on a patch of water enclosed inside a solid (Calcite) when it is heated by a dipole antenna. Currently, I am simulating the antenna in a separate study...

10 November 2015 5,777 2 View

How do I model conduction and convection in heat transfer in solids interface?

I am trying to model heat flow in a material using the Heat Transfer in Solids interface of COMSOL (5.1). I would like to include conduction and convection as well. Guidance needed for a new...

08 September 2015 1,340 5 View

How to solve Convergence error due to singularity in COMSOL?

I am trying to model heat flow in a solid material. I am using periodic ON/OFF of the Electromagnetic source (Antenna), via a rectangular pulse. The pulse is ON for 12 hours and OFF for 12 hours,...

08 September 2015 9,636 0 View

How can we select boundaries, edges, domains in COMSOL?

I am new to COMSOL and I would like to know how to find out the number of boundaries, edges and domains? How does COMSOL assign the numbering. For example, if I want to assign a material to my...

07 August 2015 5,765 2 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

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

How to build fluid structure interaction simulation for elastic ring squeeze film damper in COMSOL?

How to build fluid structure interaction simulation for elastic ring squeeze film damper in COMSOL?

22 February 2021 5,408 1 View