Mesh Definition and 224 Threads

in ansys turbogrid i faced a setting that couldn't find out how it works and couldn't find an appropriate description for that. Near Wall Element Size specification in mesh data object that has 3 methods(1-absolute 2-y+ 3-normalize) i upload an image from software if someone know anything...

Homework Statement Exercise 4.15 on the image. The exercise asks for the value of the current I using superposition Homework Equations Superposition theorem, nodal and mesh analysis The Attempt at a Solution I think i am doing the mesh analysis wrong, but can't see where. Can someone...

How small would screen mesh have to be so that it would be consider waterproof? (ex: screen mesh small enough so that it would not break the surface tension of the water)

Hi there. I was trying to implement Numerov method for solving second order differential equations (you can see some information of Numerov algorithm at here: https://en.wikipedia.org/wiki/Numerov%27s_method ). At the beginning I've used a uniform grid mesh, all points equally spaced. I'm...

I was trying to implement a variable grid mesh in Numerov's method, while playing with fortran. Numerov method was working well with a standard discretization, but when I tried to implement this variable grid, things came to look as if the 'metric' of the function were depending on the...

i3 -? This is how I tried to solve using cramer's rule (denominator is the determinant of the matrix, while numerator is the determinant of the modified matrix) I ignored the prefix Kilo, but the method is right. So I get a different value for i3. Does anyone know what's wrong?

I have a function f(x,y) which i have defined in this way: a vector x and a vector y meshgrid[x,y] z= f(meshgrid[x,y]). how do i do a 2-d Fourier transform of f(x,y)? the transform must be done without using operations like fft, and must be done using summations written in the code.

I'd like to find Vth by mesh current analysis. Mesh A and B share a current source, so they're treated as one supermesh. What's the equation for this supermesh? Also, do I ignore the loop with the open circuit? Since there's no current flowing there... 2A = ib - ia Anyway, is this the right...

1. I have a question regarding the treatment of voltage sources in Mesh Analysis by inspection. I hope this is the correct place to post. In my course textbook (Fundamentals of Electric Circuits 4e p. 101) it says that the voltage is the algebraic sum taken clockwise of all independent voltage...

Hi pf, Please could someone provide an explanation of why the relationship between the wavelength and size of the gap is the significant factor for determining whether or not it blocks radiation in particular reference to the mesh on the door of a microwave oven. It seems very simple when a...

Given the circuit diagram above, I am interested in finding the current ia. Using mesh analysis, I determined it to be 1.71mA, but nodal analysis results in a value of 2.25mA. Solution attempts provided below. I think the issue is in my nodal analysis approach. Mesh Analysis..I1 is the left...

Hi everyone, I have recently installed ANSYS 14.5. But after opening workbench, while trying to open Fluent I am getting problems like "Unable to start the geometry editor." and "Unable to start the Meshing editor." I have attached the error screen shot. Please help me out in this. Thanks a lot.

Hi everyone! I'm trying to figure out how to go about this in calculating resistivity of a titanium grade 1 mesh. From what I know the ρ for titanium is 4.3x10^-8 ohm x m. The mesh will be a 1x12inch sheet wrapped cylindrically end to end. Here are the stock values including a change in area...

Hi - I have been through quite a few articles on the Lagrange Mesh method and mostly follow it, but still find it confusing to understand which are the practical equations I should be using. I want to find the expression(s) for the Kinetic energy matrix elements for the Laguerre mesh to be...

Hi, I have been trying to find some articles that would cover the Lagrange mesh method applied to the 1-D Schrödinger eqtn. - using the Laguerre mesh. I want to develop some fortran programs, for example building Lagrange functions, the kinetic energy matrix elements ... LMM is totally new to...

I am working on implementing a PDE model that simulates a certain physical phenomenon on the surface of a 3D mesh. The model involves calculating mixed partial derivatives of a scalar function defined on the vertices of the mesh. What I tried so far (which is not giving good results), is this...

Homework Statement Solve using the Mesh-current method. Determine the current magnitudes and the voltages across all elements Homework Equations i=v/r i1+i2+i3..=0 The Attempt at a Solution loop 1: 16(i3-3)+25i1-5i2=12 loop2: 4i1-5i2=15 1) i1=5/9i2-1 substituting 1) into loop2 gives...

Hi, I'm trying to figure out if I haven't undestood the correct way to do a circuit analysis yet, or if I am just mistakening my calculi. Here is a scheme of the circuit: The component in the right bottom angle is a voltage dependent voltage source controlled by V0. I tried to make a mesh...

I neet to do a structured triangular mesh 2D of a complex geometry with FORTRAN Can someone help me!

I know this sounds like an odd question, but to me, it would be useful to figure this out, so I'm throwing this out there to see if it bounces off anyone. I would like to know if there is a relatively simple way to cause calcification of a sheet of knitting canvas. The material in question is...

Homework Statement There is an infinite 2D mesh of conducting wire. Resistance between any two consecutive junctions is R. What is the equivalent resistance between any two consecutive junctions? Homework EquationsThe Attempt at a Solution Every junction is connected to four points and one of...

Homework Statement Obtain the voltage Vx in the network of Fig.Q11, using the mesh current method. (Ans: Vx=4.35∠-194.5) Homework EquationsThe Attempt at a Solution I am not getting the correct answer, are my loop equations correct ? 10 - 2*i1 + 2j*i1 -5j(i1+i2) -5(i1+i3) = 0 4.33 + 2.5j -...

i am new to ANSYS, i designed a wind turbine blade in solidworks, when i try to create mesh it gives me an error. Previously i have made a mesh for a wind turbine blade i used >mapped face mesh then i used sizing and it was done but this blade is a bit different as it has 3 airfoils used in it

Homework Statement Use the mesh-current method to find the branch currents ia, ib, and ic in the circuit in figure.(Figure 1) And find currents i_a, i_b, and i_c if the polarity of the 77V source is reversed. The values of v1 and v2 are 77V and 16V , respectively. Homework Equations Mesh...

Homework Statement Homework EquationsThe Attempt at a Solution I'm not getting the correct answers, this is what I tried Loop 1: 150 - 14*i1 - 6(i1+i2) = 0 Loop 2: -24 + 3*i3 = 0 Therefore i3 = 8A 7A = i2 + i3 Therefore i2 = 7-8 = -1A Plugging that in equation 1, I get...

Homework Statement We have the circuit in the figure.I have to find Io. Homework Equations Mesh current analysis. The Attempt at a Solution The first mesh is i1 and the second one is i2. We have a supermesh here.Supermesh results when two meshes have a (dependent or independent)current...

Homework Statement I need to find a sequence of partitions , let's call it S of R=[0,1]x[0,1] such that as the number of partitions k→∞ , then limit of the area of the largest subinterval of the rectangle in the partition, denoted a(S) tends to 0, but the mesh size m(S) is a non-zero value...

Homework Statement Determine, using the values given in TABLE A, the current I in the circuit of FIGURE 2 by: (a) mesh analysis (b) nodal analysis. Any help verify for part (a)? And to help me get started with (b) as V3 is driving me nuts. Homework EquationsThe Attempt at a Solution For (a)...

Homework Statement Please see a picture Homework Equations KVL The Attempt at a Solution V1-I1Z1-(I1-I2)Z4=0 Z2(I2-I4)+Z5(I2-I3)-(I2-I1)Z4=0 Z3I3+V2+Z5(I3-I2)=0 V3+Z2(I2-I4)=0 Any clues are appreciated..

Hi I'm taking an intro course to electrical and computer engineering and I'm having trouble figuring out part c of number one. I have attached a copy of my solutions to parts a and b which I believe are right (correct me if I'm wrong please) however when I calculate the power dissipation of each...

Homework Statement I am going to have my circuit mid-term very soon, and I always used wolfram alpha to solve my mesh system of equations. I am just wondering if there is an easiest accurate way to solve for systems of equations from mesh and nodal analysis. For example, my classmate suggested...

I'm working on a structural member that is undergoing pure bending. The load is at the end of the member. I am modeled this as a 3 dimensional solid. I meshed using the bottom up approach and associated the meshed regions to their appropriate geometries. The problem I am having is that when I...

Homework Statement i can't write the problem text as it is a circuit [b]2. Homework Equations I labelled the meshes as clockwise shown on the image KVL: The sum of voltages around a loop equals zero The Attempt at a Solution i1 = 8A i2: 19(i1 - i2) - 5.54(i2-i3) = 0...

I've attached a picture of the problem statement, figure, and of my work so far. I'm trying to use mesh currents and then differentiate it, but I really have no idea if I'm on the right track. Also, I don't understand why i1 isn't just V/R (The physical current is the mesh current for R1...

Howdy! Looking for help with the following problem (#33). I found it easiest to take a picture of the problem statement and the figure and another of my work (I am working on learning LaTeX so I can write them neatly in posts, but until then, I hope a picture is sufficient). I got the system...

I'm an intro calc-based physics instructor, and recently uncovered some vagueness, or maybe errors (?), with my recipe. Can you please comment on the following? Question 1: Loop Currents - MY RECIPE: "Determine # of loop currents by connecting each circuit junction once, and only once, to a...

What is the Lagrange Mesh method?

Hello people, I ve recently started to solve questions about magnetic coupled circuits, but I am stuck at a question that I ve seen for first time. I want to write the mesh equations but I simply don't know what should I do with the transformator in the middle when writing the equation for upper...

Hi all, I have co-ordinates of 4 vertices of quadrilateral for every element in mesh. I assembled such elements by moving single, separate point in whole domain and compared it's coordinate with all vertices of quadrilateral. Above technique work properly, but it required rectangle element...

Hi Could anyone explain to me the concept and significance of mesh density as a function of steps per wavelength? I am asking this in context of a frequency domain EM-solver. Thanks

Hi all, It is well know that, rectangular or quadrilateral element gives better result over triangular meshes in finite element method. I know, Rectangular meshes has more discretization error, but my question is that, if i refine mesh up to 4 to 6 pixel width of screen, where i am wrong?

I have just gotten my new Ti-nspire CAS calculator and seem to be stumped. I have created my two equations from my mesh analysis of a circuit. Loop I2: I1(2+j2)+I2(8-j2)=12 Loop I1: I1(-j2)+I2(j-4)=0 I know I can solve this by hand but would like to learn to use my nspire. Any direction...

Hello, I was wondering if you have for example, a 6/8 mesh, does that mean for the particle diameter you do 0.5(D6) + 0.5(D8) to find an average diameter of the 6/8 mesh particles?

Homework Statement Hi Basically, I have to learn about mesh analysis and have been given a circuit from which I am meant to find the equations to find the currents through each load in the system. Thing is, I am not sure whether my loops for solving the circuit are correct. Would...

Homework Statement Attached an image. Homework Equations KCL The Attempt at a Solution 80 = 10i1 + 20(i1 - i2) + 30(i1 - i3) 30 = 12(i2 - i3) + 20(i2 - i1) 0 = 40i3 +30(i3 - i1) + 12(i3 - i2) 80 = 60i1 - 20i2 - 30i3 30 = 20i1 + 32i2 - 12i3 0 = -30i1 - 12i2 + 82i3 i1...

Homework Statement I have attached an image of the problem: Homework Equations KCL Equation The Attempt at a Solution 0 = 2i11 + 3(i1-i2) 212 = 3(i2-i1) + 5(i2-i3) -122 = 3i3 + 5(i3-i2) 5i1 - 3i2 = 0 -3i1 +8i2 + 5i3 = 212 -5i2 + 8i3 = -122 Is this the correct approach? Also, does anybody...

Homework Statement Use the mesh-current method to find the power developed in the dependent voltage source in the circuit in figure (Figure 1) if v = 29V. Homework Equations ∑R in mesh 1 * i_1 - ∑R in common between meshes 1 and 2 * i_2 = v_source in mesh 1 ∑R in mesh 2 * i_2 - ∑R in...

Homework Statement I need to find the Current through short circuit wire (between a and b). Homework Equations All the resistor values are same, 100 Ohms V1 = 5V V2 = 10V The Attempt at a Solution Loop A ia*(R2+R4+R1) - ib*(R4) = 5 Loop B 10 + (ib-ia)*R4 + ib*R3 = 0...

Hello everyone. Hope somebody can help. Homework Statement We are given the following circuit. http://puu.sh/70uaQ.png We need to find the currents i1, i2 and i3 by explicitly using the mesh law. Homework Equations There are no relevant equations.The Attempt at a Solution So, I draw these 4...

Specifically what maths do I need to learn to be able to do the following? Wrap the surface of a 3D volume (convex hull) with a 2D convex hexagonal mesh. My guesses so far, Some kind of projection/mapping algorithm? Some way of calculating 2D Voronoi diagrams on curved surfaces...