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 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 to determine the strucutre of a complex in solution ?

i have a complex i synthesise in situ, currently i use UV-vis to study its geometry. is there other techniques to study its geometry in solution ?

25 October 2019 2,062 7 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

How to define and get results (stresses) for certain points of a model in abaqus, using python? When the size of the model changes?

I want to do a parameter study of a aixsymmetric cylinder in Abaqus. I want to create several jobs where I get the stresses for 3 different points in my model. These points are defined. I wrote a...

01 March 2021 10,078 1 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

What is Flat Lens Antenna?

28 February 2021 5,433 3 View

Can impedance of antenna be less than 50 ohms?

I am simulating helix antenna in hfss, right now, giving excitation with 50 ohms port. When I see the results of Z parameter (real). It shows lower than 50 ohms. Do not understand, if it can be...

27 February 2021 4,218 7 View

How relevant is Mini slump cone?

for all the rheology researchers, my question is, how relevant is a mini slump cone (smaller than a standard 50 cent rheometer). currently based on testing, the thickness of slumped material is...

26 February 2021 3,668 1 View

Stress/strain tensors decomposition ???

25 February 2021 6,760 1 View

How to reduce residual stresses in MD simulation?

I am working on a preparation of representative polymeric structures of some popular polymers, such as polyimide or PTFE for MD simulation, during which a single nitrogen or oxygen atom will be...

24 February 2021 8,105 3 View