Help request in CST microwave?

im working now on TPV solar cells and metamaterials and i realy need our help in CST microwave i have a tpv cell simulation and i want to extract particullarly the absorbtion of only the active...

02 March 2021 2,246 2 View

The most suitable method to calculate the stress intensity factor in the presence of contact between the crack lips?

I'm trying to study cracked structures under a compressive load taking into account contact between the crack lips. I would like to know if the method of extrapolation by displacement remains...

21 February 2021 8,694 4 View

How can i get the data for the FTSE/JSE Responsible investment top 30 index (J110)?

Hi All , Please can you recommend a free database (i already use yahoo finance but it's not avaible) ,or if someone has already worked on this index for the period of 2015 it would be great to...

22 December 2020 247 3 View

How to find the dimensions of a patch antenna of a horn shape?

So i was asked to make a horn-shaped patch antenna, but i'm having hard time to find its dimensions. Is there a relation between a real horn antenna dimensions and a patched one?

07 December 2020 1,748 3 View

How to implement the Maximum Tensile Stress Criterion for crack propagation ?

Hello everyone, I'm working on crack propagation using a meshless method in linear elastic fracture mechanics and I want to use the Maximum Tensile Stress Criterion. I need some references or...

29 September 2020 2,362 3 View

How to calculate the sum and the subtraction of many random variables that follow exponential distributions ?

How to calculate the sum and the subtraction of many random variables that follow exponential distributions and have different parameters ? (The value of Lambda is different for all or some...

03 September 2020 3,721 10 View

Question regarding displacement of phases in Match! software?

Hello First of all i am an amateur when it comes to XRD and phase analysis so please bare with me on this . That being said , i am having an issue with Match! software whereas the suggested phases...

09 March 2020 4,240 6 View

About a MOSFET device ?

Is the thermal study of the MOSFET device important to improve the efficiency of the device or is there another opinion?

06 January 2020 8,718 4 View

How to model the terminations of a coaxial cable in MoM simulation? and How can i get the its Transfer Impedance ?

I want to simulate a coaxial cable in FEKO software. However, the results do not agree with the transmission line solution that uses the transfer impedance (Schelkunoff model). I m thinking that...

05 December 2019 4,357 8 View

Rotate mesh in ANSYS?

Hello , I am trying to make a 2D airfoil simulation using ansys fluent to calculate Aerodynamic coefficients for multiple angles of Attack . the domain i build has two parts exterior and a cyrcle...

19 November 2019 6,217 6 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

High aspect ratio hexahedral mesh optimization solver?

I am interested in evaluating mesh optimization solvers that converge to high aspect ratio unstructured hexahedral grids. In other words, I am interested in a solver that optimizes warpage,...

26 February 2021 7,279 2 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

Implementation of chance-constrained optimization problem via scenario approach?

23 February 2021 7,826 2 View

Should I use Pressure Based Solver or a Density-Based Solver?

Dear researchers, I want to simulate a flow (air) in a wind tunnel, and I want to integrate a fluidic actuator inside it in order to control the separation of the boundary layer. At the blower...

22 February 2021 4,882 3 View

Is there any effective FEM solver to perform simulation of balloon inflation with large deformation (e.g. 300% strain)?

Hi! Thank you for your time, attention, and support. I am currently using FEM solver Abaqus to perform a set of balloon inflation simulations, trying to understand the deformation shape, stress,...

14 February 2021 2,524 4 View

How to model in HFSS or FEKO Free Space Material Characterization?

I am having trouble setting up this problem in HFSS or FEKO. In HFSS, I've tried both FEM and FEBI-IE solvers. With FEKO, I've tried it's MoM solver and default settings. I am would like model...

09 February 2021 375 2 View

Is it possible to report hydrodynamic loads on different parts of an ocean vehicle while 6DOF motion analysis in Ansys Fluent is running?

It seems a 6dof UDF containing vehicle characteristics such as mass and moments of inertia can be used for specifying a boundary as reprentative of ocean vehicle. It is required to have...

03 February 2021 7,726 3 View

How to Fix Floating Point Exception in Fluent?

Hello, I am trying to model a solar cyclone tower (The solar cyclone: A solar chimney for harvesting atmospheric water ) in Fluent. At the moment, I am trying to model a simplified version...

30 January 2021 9,448 3 View

Error While Solving Stiff Problems In COMSOL?

Hi, So I am trying to solve a stiff problem using Global ODEs and DAEs. The problem has 32 differential equations and I have inserted all the initial values correctly, however, I keep getting this...

28 January 2021 1,872 3 View