What is Mesh: Definition and 244 Discussions

hi ! i have created finite element mesh in abaqus. i need to export this mesh i.e. the nodes and element details on a file. can anyone guide me in this respect

Hello there, Subdivision modeling is a tool which all 3D Modeling Softwares uses. Its about creating a low density mesh and computer creates higher density mesh until your box turn into a sphere.I found something about finding iterative fractal function of a 3D object for example Rodin...

I've been asked to teach an electrical engineering course, due to lack of EE people at my college. I've been running through Mesh , nodal analysis etc. Its seems like these are just variations of using kirchhoffs voltage and current continuity equations. It seems pointless to me, I've...

Homework Statement Using matrix algebra calculate the voltage expected across each resister in the circuit diagram. Only need the simultaneous equations. The Attempt at a Solution -15=6800(I_b-I_a )+2200(I_b-I_c) 15=2200(I_c-I_b )+8200(I_c-I_d) -25=8200(I_d-I_c )+4700I_d Thanks for any help.

Homework Statement Find the node voltage method equations. Do not solve Find the mesh current method equations. Do not solve Homework Equations NoneThe Attempt at a Solution Using nodal analysis: Node v1 : -Is4+(v1-v2)/2+v1/20-10=0 Node v2 : Is4+(v2-v1)/2+3+(v2-30)/5=0 Looking at this I feel...

I'm using COMSOL 4.0a. Whenever I apply a free tetrahedral mesh, I can see it on the structure immediately. However, now I need to use a moving mesh to combine the results of structure deflection and fluid flow. I cannot get the solver to compute without errors. Am I supposed to immediately...

Hi! I have to do cartesian mesh of 3d object. I have to do this in Matlab. It will be a part of FEM programme. I've read sth about Delanuay triangulation etc, but I have to do really simple disretization sth like in http://en.wikipedia.org/wiki/Regular_grid (Example of a Cartesian grid.)...

hi what is concept of mesh cutoff energy? what is concept of Fermi energy in semiconductor and metallic CNTs?

given Electric circuit, i asked to find each current (I1 I2 I3 I4) by using Mesh Current Method. so how you can see in the picture i marked the directions for the 4 currents in blue color. and i wrote the equations in red color. what i am not sure is if the equations for I3 and I4 is...

I have performed interpoaltion of applied pressure from one mesh (mesh of tetra elements) to another mesh (mesh of brick elements). I have done the interpolation. I want to introduce some checks if my interpoaltion is rightly done.. Please can anyone advise what could be the checks that...

Phasor Mesh Current--what am I doing wrong?? Homework Statement Circuit diagram: Calculate the phasor mesh currents, I1 and I2. Homework Equations KVL/Mesh Current analysis with phasors/complex numbers. The Attempt at a Solution Mesh 1: (-550@0deg) + j75(I1) + 30(I1 - I2) -...

You know how a microwave oven has a mesh on the door so visible light gets through but not the microwaves? Can such a thing be done with infrared radiation too? Is it possible to block heat from getting through a mesh but not visible light?

Could someone please direct me to a good book/article that describes how to use a coarse and fine spatial mesh with the numerical method of characteristics? Thank you. Kate

[b]1.Find the voltage drop across each resistor? (I'll be able to do this after finding out the currents) I've had a go at the formulas but not sure if they're right I've never done 3 voltage sources before so the middle one is putting me off. Any help with the formulas would be great thanks.

Homework Statement Homework Equations KVL/KCL The Attempt at a Solution Meshes for; Loop 1 20 = 6i1 - 4i2 - 2i3 Loop 2 -4i1 + 18i2 - 8i3 = 0 Loop 3 2i1 + 8i2 + 6i3 +10i0 = 0 For the life of me I cannot get -5A as the answer. I have tried the following for i0; i0 = i1 - i2 i0 =...

Mesh Current: Cannot see my mistake in my approach? Homework Statement Find currents I1, I2, and I3 using Mesh Current Analysis in this circuit: Homework Equations KVL The Attempt at a Solution Initial equations: Mesh 1: -120 + 20k(I1) + 40k(I1 - I2) = 0 Mesh 2: 40k(I2 -...

Hi, I have written a piece of code to plot a greyscale image using imshow and a mesh plot using mesh in the same plot (the graphs are subplots in the smae figure. My problem is that when I use imshow the meshplot turns to greyscale rather than colour, and I can't worj out how to have one plot...

FEA meshing - why not 2d mesh -> 3d mesh ? Well, I have just realized why the people do not use FEA (finite elements analysis) as often as they should do: FEA preprocessing phase is a disaster! Simply speaking - there is no simple, efficient meshing software available on the market. Existing...

Homework Statement Find the value of CSB(current source B) and determine the value of I. Homework Equations Mesh equations The Attempt at a Solution mesh: a -> Ia = 0 b -> 11Ib = -12 c -> 6Ic = 12 d -> 2Id = -8 e -> Ie = -CSB Ic = 2 A Id = -4 A then I cannot...

Homework Statement [PLAIN]http://img718.imageshack.us/img718/3519/circuith.png This is a circuit I've simulated in pSpice, I can't get the currents to match up with my hand calculations using mesh analyses. Specifically, I'm not entirely sure how to handle the current source...

Homework Statement We have been doing mesh analysis of circuits, and I am just trying to work out how to do it in a larger circuit. Homework Equations 2. Using mesh analysis work out the currents flow through each of the three meshes. From these current values calculate the voltage...

Hi guys, is there anyway i can solve the voltage across the current source using Mesh Analysis. I already solved for the voltage across the current source using Nodal analysis. And btw, do you have any tips which technique is the best to use (Kirchoff's, Mesh, Nodal analysis) for different...

HI I have a problem in ansys that made me confused...I have modeled a conceret dam and meshed it with solid 45 elements...after that I have assigned the available surface pressure on the dam to the model...in another modeling, I changed the mesh size only and analyzed the the model with the...

Hello,:smile: Actually I'm just curious to know when and where we can apply mesh and nodal analyses. Perhaps, you can help me to understand this with some simple circuit diagrams. Thanks 1: To apply nodal analysis we must have at least two nodes. Am I correct? Moreover, we also need one extra...

Homework Statement Please see the attached file for the problem statement. I am attempting to find the current across the .25 Ohm resistor. Homework Equations Using kirchhoffs voltage law I write the following equations: (1 Ohm)(2 amps) + (.25 Ohm)(2 - M1) = 0 The Attempt at a...

Hi guys, I've referenced this forum many times so now its time to join! My problem, I'm having trouble understanding Nodal and Mesh analysis (and when to use each one, and why), especially when inductors and capacitors are present. For example here is a question that was proposed to me...

hi guys I am trying to fined Vo and Io using mesh analysis for the following cct The formulas I made from the cct using mesh analysis don't seem right :grumpy: here is what I have- loop1 2(I1 - I2) = 0 loop2 2(I2 - I1) + I2(j4) - 3Vo = 0 loop3 3Vo + I3(-2j) = 0 and I1 =...

Homework Statement see attached Homework Equations The Attempt at a Solution I'm working on the first circuit at the moment.We have to use mesh analysis to find the voltages at the i have put it in multisim and know the voltages are 4.78 and 4.58 respectively. i have done the...

Hi I need a way of joining a very thin strip of stainless steel mesh to form a cylinder. It forms the 300 micron mesh cylinder that sits inside a inline "Y" type strainer. The one i have currently doesn't seem to be joined by adhesive but by a heat crimp or sum sort of non...

this question is part of my electronics CW, I've done it before, but briefly. and looking back at all my old notes I've realized that every single one I've done before has 2 sources and only 2 loops, whereas you can see from the image below that this has 3 and its getting me in quite a...

Homework Statement I am supposed to use mesh current analysis using the following circuit diagram which is in the phasor domain: Homework Equations KVL The Attempt at a Solution Let's number these meshes from left to right 1,2,3. Here is what confuses me: If take a look at...

Homework Statement The circuit shown has two inputs, V_{s} and i_{s} and one output V_{o}. The output is related to the input by the equation V_{o}=ai_{s}+bV_{s} where a and b are constants to be determined. determine the values a and b by (a) writing and solving mesh equations and (b) writing...

Homework Statement Homework Equations KCL & KVL: The Attempt at a Solution Ok folks :smile: I am not sure where to go from here. Someone suggested changing the 144V to its Thevenin equivalent, which I have done below. I know that I am supposed to apply KCL at each node...

Homework Statement Find i0 in http://images3a.snapfish.com/232323232%7Ffp73395%3Enu%3D52%3A%3A%3E379%3E256%3EWSNRCG%3D3359%3B24399347nu0mrj" using mesh current analysis. Note that the ^i1, ^i2 and ^i3 are to label my currents and show they are flowing clockwise. i0--> is the direction of the...

Homework Statement Use mesh analysis to determine i1,i2 and i3 Homework Equations The Attempt at a Solution using mesh analysis i get rid of the 3A current source and the 1ohm resistor 1) -6 + 2(i1 - i3) + 4(i2 - i3) + 8i2 = 0 2) 2(i3 -i1) + 2i3 + 4(i3 - i2) =0 3)i1 + i3 = 3...

The problem can be seen @ http://gregsomers.com/elg.jpg Depending on what way is chosen for the current going through the 50ohm resistor, there are completely different answers... how do i know which direction to choose? I.E. 50(i2-i3) for current flowing to the right OR 50(i3-i2) for...

Homework Statement a) Use Y-Δ transformation to simplify the circuit in Figure 2-a to that in Figure 2-b and find the elements and values of Z1, Z2 and Z3 b) Use mesh analysis for the circuit in Fig. 2-b to calculate I1 and I2 Here are the circuits...

Homework Statement Homework Equations Not necessarily any equations ,just systematic approaches for mesh current analysis like using KVL Also used cramer's rule The Attempt at a Solution My work: http://i28.photobucket.com/albums/c216/aldodesigns/page1.jpg...

Homework Statement First post here... Sorry it has to be a question. I'm currently studying electrical engineering at university. Anyway, I've hit a couple of these mesh type circuits in my workbook and have no idea how to tackle them? The question asks to solve using Thevenin's...

Basically, part of my uni course is electronics and some of the mesh current method questions involve complex numbers, mainly the use of j and other things. I would get the answer as the solution gets it down to 4-j7 and then it says this equals 8.0623<-60.2551° ......... ...< is supposed to be...

Hi all, I've written a program that solves the Poisson equation in an irregular mesh, using a finite volume discretization. the method works well, and the solution is very good at a distance of 2-3 mesh sizes off of the source. The problem is that I need to know what is the contribution of...

I have a plate 35mm X 35mm and is about 2mm thick. In the middle of the plate there is a round insert that is a different material that is .1mm thick and 10mm in dia. I am applying a uniform heat flux to the top flat surface for 5sec and then let it cool for another 5sec. When I look at the...

Hi, I am sure I have mistaken my DE setup or my initial conditions assumption. Homework Statement http://ivila.net/E8.png R1 will be the middle Resistor R2 the top one. Homework Equations i1' + R1/L i1 = R1/L i2 i2(R1+R2)*1/(R1) + 1/(R1*C)*integral(i2)=i1 The Attempt at a...

Does anyone have a clue on how to obtain the mesh from the ultrasound image? The region of scatterer is automatically more densely meshed than its ambient. Any software? algorithm? Thx. Elgen

What I need is a 2d mesh,user specified.I have find some solutions on net but still have problems compiling.Anyone knows wheret o find more?

This was a test problem on an exam of mine. The problem asks for you to find the current through the 8 ohm resistor, which is 2.5 amps. I can solve the circuit by superposition or by source transformation and then reduction, but I cannot seem to solve it with mesh analysis. I defined three...

Hi, I have the following circuit: [PLAIN]http://img265.imageshack.us/img265/6476/upg2.png But when i try to calculate the mesh currents i end up with the wrong answer. This is what i did: Equation for i1: 6i_1 + 18(i_1-i_2) -30 Equation for i2: 17i_2 + 18(i_2-i_1) -19 Adding currents in the...

Hi, I am trying to shade two portions of the polygon defined by the dotted line in this code. The Mesh and MeshFunction cmds seem to allot global shading only. What is the best tool to shade, say half of the aforementioned polygon? Function[{LtMarg, BotMarg, RtMarg, HVal, DVal, rVal}...

Hi, I just have a quick question about mesh convergence, hopefully someone can help. I have a model of a pipe bend that I've meshed using ABAQUS and then found the location and value of the maximum von Mises stress. I then refined the mesh a few times and plotted the max stress against the...

Hi guys, I'm using a composite trapezoidal rule to approximate the integral of functions. Up till now I have been using a uniform composite mesh, ie, there are J intervals, each interval being 1/J wide (since the integral is between 0 and 1). How do I find the most efficient non-uniform mesh...